CN108282431B - Information processing method and device - Google Patents

Information processing method and device Download PDF

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CN108282431B
CN108282431B CN201710009572.XA CN201710009572A CN108282431B CN 108282431 B CN108282431 B CN 108282431B CN 201710009572 A CN201710009572 A CN 201710009572A CN 108282431 B CN108282431 B CN 108282431B
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pilot signals
phase
port
phase tracking
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CN108282431A (en
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李辉
高秋彬
塔玛拉卡·拉盖施
苏昕
陈润华
李传军
黄秋萍
王蒙军
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China Academy of Telecommunications Technology CATT
Datang Mobile Communications Equipment Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
    • H04L27/2695—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation with channel estimation, e.g. determination of delay spread, derivative or peak tracking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/38—Demodulator circuits; Receiver circuits
    • H04L27/3845—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier
    • H04L27/3854—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier using a non - coherent carrier, including systems with baseband correction for phase or frequency offset
    • H04L27/3872—Compensation for phase rotation in the demodulated signal

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention provides an information processing method and device, relates to the technical field of communication, and aims to accurately calculate channel state information when phase noise exists at a sending end or a receiving end. The information processing method of the present invention includes: sending pilot signals of N ports to a receiving end, wherein the pilot signals of the N ports are distributed on M Orthogonal Frequency Division Multiplexing (OFDM) symbols; and sending the phase tracking pilot signals of the S ports to the receiving end, so that the receiving end performs phase compensation according to the pilot signals of the N ports, the phase tracking pilot signals of the S ports and the port corresponding relation acquired by the receiving end according to a preset mode and determines channel state information.

Description

Information processing method and device
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an information processing method and apparatus.
Background
In the Rel-10 LTE (Long Term Evolution) system, a measurement pilot (CSI-RS, channel state information reference signal) is introduced. The channel state information reference signal is used to make measurements of channel information. When a large-scale antenna is used at a transmitting end, a plurality of antenna ports are usually provided, and in order to measure channel characteristics at each antenna port, CSI-RSs of the plurality of ports need to be configured correspondingly for a receiving end to perform channel measurement.
The measurement pilot may be configured as 2-port or 4-port or 8-port. Due to the enlargement of the antenna scale, in the LTE system of Rel-13 release, measurement pilots of 12 ports and 16 ports are introduced, and further, in the LTE system of Rel-14 release, pilots of 20 ports, 24 ports, 28 ports and 32 ports are introduced.
Fig. 1 shows one possible 32-port CSI-RS pilot configuration. The numbers in the figure indicate the CSI-RS port numbers. On the same subcarrier, two adjacent CSI-RS ports are multiplexed on the two Resource Elements (REs). The 2-port CSI-RS, labeled "1516" in the figure, multiplexes these two REs, with each port occupying two REs, using (11) and (1-1) multiplexing together.
According to fig. 1, the different ports of the 32 ports are distributed over different OFDM (Orthogonal frequency division Multiplexing) symbols, e.g. port 15 is located over OFDM symbols 5, 6 of slot 0, port 23 is located over OFDM symbols 2, 3 of slot 1, and port 39 is located over OFDM symbols 5, 6 of slot 1.
In a non-high-speed mobile scene, if the transmitting end and the receiving end do not have phase noise, each OFDM symbol in the subframe can be approximately considered to have the same channel characteristics, so that all the port CSI-RSs distributed on a plurality of OFDM symbols experience the same channel characteristics, and complete channel estimation can be accurately carried out. However, if phase noise exists at the transmitting end or the receiving end, different phase changes will be generated on different OFDM symbols, CSI-RS ports on different OFDM symbols will experience different channel characteristics, and an estimation error will be generated when estimating a complete channel.
Disclosure of Invention
In view of the above, the present invention provides an information processing method and apparatus for accurately calculating channel state information when phase noise exists at a transmitting end or a receiving end.
To solve the above technical problem, the present invention provides an information processing method, including:
sending pilot signals of N ports to a receiving end, wherein the pilot signals of the N ports are distributed on M Orthogonal Frequency Division Multiplexing (OFDM) symbols;
sending the phase tracking pilot signals of the S ports to the receiving end, so that the receiving end performs phase compensation according to the pilot signals of the N ports, the phase tracking pilot signals of the S ports and the port corresponding relation acquired by the receiving end according to a preset mode and determines channel state information;
wherein, in the phase tracking pilot signals of the S ports, the phase tracking pilot signal of each port corresponds to the pilot signals of K ports in the pilot signals of the N ports, and the pilot signals of the K ports have the same phase noise; transmitting the phase tracking pilot signal of each port using the antenna port used by one or more of the K ports;
wherein N, M, S and K are integers which are more than 0, and N is more than or equal to K and more than or equal to 1.
Wherein, the phase tracking pilot signal of each port is transmitted on the M OFDM symbols and occupies the same sub-carrier; or one of the M OFDM symbols is selected as a reference symbol, the phase tracking pilot signal of each port is transmitted on the reference symbol and the OFDM symbol where the pilot signals of the K ports are located, and the same subcarrier is occupied;
the port corresponding relation is as follows: each of the S ports corresponds to the K ports.
Wherein the method further comprises:
sending the port corresponding relation to the receiving end; or
And the receiving end appoints the corresponding relation of the ports in advance.
Wherein the pilot signal comprises a channel state information reference signal, and the phase tracking pilot signal comprises a phase tracking reference signal or a channel state information reference signal.
In a second aspect, the present invention provides an information processing method, including:
receiving pilot signals of N ports sent by a sending end, wherein the pilot signals of the N ports are distributed on M OFDM symbols;
receiving phase tracking pilot signals of S ports sent by the sending end;
acquiring a port corresponding relation;
performing phase compensation according to the pilot signals of the N ports, the phase tracking pilot signals of the S ports and the corresponding relation of the ports, and determining channel state information;
wherein, in the phase tracking pilot signals of the S ports, the phase tracking pilot signal of each port corresponds to the pilot signals of K ports in the pilot signals of the N ports, and the pilot signals of the K ports have the same phase noise; transmitting the phase tracking pilot signal of each port using the antenna port used by one or more of the K ports;
wherein N, M, S and K are integers which are more than 0, and N is more than or equal to K and more than or equal to 1.
Wherein, the phase tracking pilot signal of each port is transmitted on the M OFDM symbols and occupies the same sub-carrier; or one of the M OFDM symbols is selected as a reference symbol, the phase tracking pilot signal of each port is transmitted on the reference symbol and the OFDM symbol where the pilot signals of the K ports are located, and the same subcarrier is occupied;
the port corresponding relation is as follows: each of the S ports corresponds to the K ports.
Wherein, the performing phase compensation according to the pilot signals of the N ports, the phase tracking pilot signals of the S ports, and the port correspondence, and determining channel state information includes:
respectively using the pilot signals of the N ports and the phase tracking pilot signals of the S ports to carry out channel estimation, and obtaining a first channel estimation result of the pilot signal of each port and a second channel estimation result of the phase tracking pilot signal of each port;
determining a reference OFDM symbol from the M OFDM symbols, and obtaining a second channel estimation result of the phase tracking pilot signal transmitted on the reference OFDM symbol;
calculating phase adjustment parameters of phase tracking pilot signals transmitted on any first OFDM signal except the reference OFDM symbol in the M OFDM symbols respectively relative to the phase tracking pilot signals transmitted on the reference OFDM symbol;
performing phase compensation on a first channel estimation result of the pilot signal transmitted on the first OFDM symbol according to the port corresponding relation and the phase adjustment parameter;
and determining the channel state information according to each first channel estimation result after phase compensation.
Wherein the phase adjustment parameters are:
a quotient of a second channel estimation result of the phase tracking pilot signal transmitted on the first OFDM signal and a second channel estimation result of the phase tracking pilot signal transmitted on the reference OFDM symbol.
Wherein the performing phase compensation on the first channel estimation result of the pilot signal transmitted on the first OFDM symbol according to the port correspondence and the phase adjustment parameter includes:
obtaining a phase adjustment parameter corresponding to a pilot signal transmitted on the first OFDM symbol according to the port corresponding relation;
and using a first channel estimation result of the pilot signal transmitted on the first OFDM symbol and a quotient of a phase adjustment parameter corresponding to the pilot signal transmitted on the first OFDM symbol as a phase compensation result.
Wherein, the obtaining the corresponding relation comprises:
receiving a notification signaling sent by the sending end, and acquiring the corresponding relation according to the notification signaling, wherein the notification signaling comprises the corresponding relation; or
And acquiring the corresponding relation agreed in advance with the transmitting end.
In a third aspect, the present invention provides an information processing apparatus comprising:
a first sending module, configured to send pilot signals of N ports to a receiving end, where the pilot signals of the N ports are distributed on M orthogonal frequency division multiplexing OFDM symbols;
a second sending module, configured to send the phase tracking pilot signals of the S ports to the receiving end, so that the receiving end performs phase compensation according to the pilot signals of the N ports, the phase tracking pilot signals of the S ports, and a port correspondence relationship obtained by the receiving end according to a predetermined manner, and determines channel state information;
wherein, in the phase tracking pilot signals of the S ports, the phase tracking pilot signal of each port corresponds to the pilot signals of K ports in the pilot signals of the N ports, and the pilot signals of the K ports have the same phase noise; transmitting the phase tracking pilot signal of each port using the antenna port used by one or more of the K ports;
wherein N, M, S and K are integers which are more than 0, and N is more than or equal to K and more than or equal to 1.
Wherein, the phase tracking pilot signal of each port is transmitted on the M OFDM symbols and occupies the same sub-carrier; or one of the M OFDM symbols is selected as a reference symbol, the phase tracking pilot signal of each port is transmitted on the reference symbol and the OFDM symbol where the pilot signals of the K ports are located, and the same subcarrier is occupied;
the port corresponding relation is as follows: each of the S ports corresponds to the K ports.
Wherein the apparatus further comprises:
a third sending module, configured to send the port correspondence to the receiving end; or
And the preprocessing module is used for appointing the corresponding relation of the ports in advance with the receiving end.
Wherein the pilot signal comprises a channel state information reference signal, and the phase tracking pilot signal comprises a phase tracking reference signal or a channel state information reference signal.
In a fourth aspect, the present invention provides an information processing apparatus comprising:
a first receiving module, configured to receive pilot signals of N ports sent by a sending end, where the pilot signals of the N ports are distributed on M OFDM symbols;
a second receiving module, configured to receive phase tracking pilot signals of S ports sent by the sending end;
the acquisition module is used for acquiring the corresponding relation of the ports;
the processing module is used for carrying out phase compensation according to the pilot signals of the N ports, the phase tracking pilot signals of the S ports and the corresponding relation of the ports and determining channel state information;
wherein, in the phase tracking pilot signals of the S ports, the phase tracking pilot signal of each port corresponds to the pilot signals of K ports in the pilot signals of the N ports, and the pilot signals of the K ports have the same phase noise; transmitting the phase tracking pilot signal of each port using the antenna port used by one or more of the K ports;
wherein N, M, S and K are integers which are more than 0, and N is more than or equal to K and more than or equal to 1.
Wherein, the phase tracking pilot signal of each port is transmitted on the M OFDM symbols and occupies the same sub-carrier; or one of the M OFDM symbols is selected as a reference symbol, the phase tracking pilot signal of each port is transmitted on the reference symbol and the OFDM symbol where the pilot signals of the K ports are located, and the same subcarrier is occupied;
the port corresponding relation is as follows: each of the S ports corresponds to the K ports.
Wherein the processing module comprises:
a channel estimation sub-module, configured to perform channel estimation using the pilot signals of the N ports and the phase tracking pilot signals of the S ports, respectively, to obtain a first channel estimation result of the pilot signal of each port and a second channel estimation result of the phase tracking pilot signal of each port;
a first determining sub-module, configured to determine a reference OFDM symbol from the M OFDM symbols, and obtain a second channel estimation result of the phase tracking pilot signal transmitted on the reference OFDM symbol;
a calculation sub-module, configured to calculate phase tracking pilot signals transmitted on any first OFDM signal of the M OFDM symbols except the reference OFDM symbol, and phase adjustment parameters with respect to the phase tracking pilot signals transmitted on the reference OFDM symbol, respectively;
a phase compensation submodule, configured to perform phase compensation on a first channel estimation result of the pilot signal transmitted on the first OFDM symbol according to the port correspondence and the phase adjustment parameter;
and the second determining submodule is used for determining the channel state information according to each first channel estimation result after phase compensation.
Wherein the phase adjustment parameters are:
a quotient of a second channel estimation result of the phase tracking pilot signal transmitted on the first OFDM signal and a second channel estimation result of the phase tracking pilot signal transmitted on the reference OFDM symbol.
Wherein the phase compensation sub-module comprises:
an obtaining unit, configured to obtain, according to the port correspondence, a phase adjustment parameter corresponding to a pilot signal transmitted on the first OFDM symbol;
a processing unit, configured to use a first channel estimation result of the pilot signal transmitted on the first OFDM symbol, and a quotient of a phase adjustment parameter corresponding to the pilot signal transmitted on the first OFDM symbol as a result of phase compensation.
The obtaining module is specifically configured to receive a notification signaling sent by the sending end, and obtain the corresponding relationship according to the notification signaling, where the notification signaling includes the corresponding relationship; or acquiring the corresponding relation agreed in advance with the sending end.
The technical scheme of the invention has the following beneficial effects:
in the embodiment of the invention, when phase noise exists at the sending end or the receiving end, the phase tracking pilot signals of S ports sent by the sending end can be used for carrying out phase compensation on the channel estimation of the pilot signals of different ports sent by the sending end distributed on different symbols by the receiving end, so that the channel characteristics experienced by all the ports are consistent, and accurate channel estimation and channel state information calculation can be carried out.
Drawings
Fig. 1 is a schematic diagram of a conventional 32-port CSI-RS pilot configuration;
FIG. 2 is a flowchart of an information processing method according to a first embodiment of the present invention;
FIG. 3 is a flowchart of an information processing method according to a second embodiment of the present invention;
fig. 4 is a schematic diagram of an antenna array at a transmitting end according to an embodiment of the present invention;
FIG. 5 is a flowchart of an information processing method according to a third embodiment of the present invention;
fig. 6 is a schematic diagram of a subframe configuration of a CSI-RS according to a third embodiment of the present invention;
FIG. 7 is a flowchart of an information processing method according to a fourth embodiment of the present invention;
fig. 8 is a schematic diagram of a subframe configuration of a CSI-RS according to a fourth embodiment of the present invention;
FIG. 9 is a diagram of an information processing apparatus according to a fifth embodiment of the present invention;
FIG. 10 is a block diagram of an information processing apparatus according to a fifth embodiment of the present invention;
fig. 11 is a schematic diagram of an information processing apparatus according to a sixth embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention will be made with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The invention provides an information processing scheme aiming at an OFDM system, when phase noise exists at a transmitting end or a receiving end, the phase change of a channel experienced by pilot frequency of ports, which is caused by the phase noise and distributed on different ports on different symbols, can be compensated, the consistency of the channel characteristics experienced by all the ports is ensured, and therefore, accurate channel estimation and channel state information calculation are carried out.
Example one
As shown in fig. 2, an information processing method according to an embodiment of the present invention is applied to a sending end, and includes:
step 101, sending pilot signals of N ports to a receiving end, where the pilot signals of the N ports are distributed on M OFDM symbols.
Wherein the pilot signal comprises a channel state information reference signal, CSI-RS.
Step 102, sending the phase tracking pilot signals of the S ports to the receiving end, so that the receiving end performs phase compensation according to the pilot signals of the N ports, the phase tracking pilot signals of the S ports, and the port correspondence relationship obtained by the receiving end according to a predetermined manner, and determines channel state information.
Wherein the phase tracking pilot signal comprises a phase tracking reference signal or a channel state information reference signal CSI-RS.
Wherein, in the phase tracking pilot signals of the S ports, the phase tracking pilot signal of each port corresponds to the pilot signals of K ports in the pilot signals of the N ports, and the pilot signals of the K ports have the same phase noise; transmitting the phase tracking pilot signal of each port using the antenna port used by one or more of the K ports;
wherein N, M, S and K are integers which are more than 0, and N is more than or equal to K and more than or equal to 1.
Specifically, the phase tracking pilot signal of each port is transmitted on the M OFDM symbols and occupies the same subcarriers; or one of the M OFDM symbols is arbitrarily selected as a reference symbol, and the phase tracking pilot signal of each port is transmitted on the reference symbol and the OFDM symbol where the pilot signals of the K ports are located, and occupies the same subcarrier.
Wherein, the port corresponding relation is as follows: each of the S ports corresponds to the K ports.
In addition, in the embodiment of the present invention, the corresponding relationship may be sent to the receiving end through a notification signaling such as a high-level signaling or an arbitrary dynamic control signaling, or the corresponding relationship may be predefined with the receiving end.
It can be seen from the above that, in the embodiment of the present invention, when phase noise exists at the transmitting end or the receiving end, the phase tracking pilot signals of S ports transmitted by the transmitting end can be used for performing phase compensation on channel estimation of pilot signals of different ports transmitted by the transmitting end distributed on different symbols by the receiving end, so as to ensure that channel characteristics experienced by all ports are consistent, and further, accurate channel estimation and calculation of channel state information can be performed.
Example two
As shown in fig. 3, the information processing method according to the second embodiment of the present invention is applied to a receiving end, and includes:
step 201, receiving pilot signals of N ports sent by a sending end, where the pilot signals of the N ports are distributed on M OFDM symbols.
Step 202, receiving phase tracking pilot signals of S ports sent by the sending end.
And step 203, acquiring the corresponding relation of the ports.
In this step, a notification signaling sent by the sending end may be received, and the corresponding relationship is obtained according to the notification signaling, where the notification signaling includes the corresponding relationship; or acquiring the corresponding relation agreed in advance with the sending end.
The notification signaling may be higher layer signaling or any dynamic control signaling.
Wherein, in the phase tracking pilot signals of the S ports, the phase tracking pilot signal of each port corresponds to the pilot signals of K ports in the pilot signals of the N ports, and the pilot signals of the K ports have the same phase noise; transmitting the phase tracking pilot signal of each port using the antenna port used by one or more of the K ports;
wherein N, M, S and K are integers which are more than 0, and N is more than or equal to K and more than or equal to 1.
Wherein, the phase tracking pilot signal of each port is transmitted on the M OFDM symbols and occupies the same sub-carrier; or one of the M OFDM symbols is selected as a reference symbol, the phase tracking pilot signal of each port is transmitted on the reference symbol and the OFDM symbol where the pilot signals of the K ports are located, and the same subcarrier is occupied;
wherein, the port corresponding relation is as follows: each of the S ports corresponds to the K ports;
step 204, performing phase compensation according to the pilot signals of the N ports, the phase tracking pilot signals of the S ports, and the port correspondence, and determining channel state information.
Specifically, in this step, the following process may be included:
(1) and performing channel estimation by respectively using the pilot signals of the N ports and the phase tracking pilot signals of the S ports to obtain a first channel estimation result of the pilot signal of each port and a second channel estimation result of the phase tracking pilot signal of each port.
(2) And determining a reference OFDM symbol from the M OFDM symbols, and acquiring a second channel estimation result of the phase tracking pilot signal transmitted on the reference OFDM symbol.
(3) And respectively calculating phase adjustment parameters of the phase tracking pilot signals transmitted on any first OFDM signal except the reference OFDM symbol in the M OFDM symbols relative to the phase tracking pilot signals transmitted on the reference OFDM symbol.
Wherein a quotient of a second channel estimation result of the phase tracking pilot signal transmitted on the first OFDM signal and a second channel estimation result of the phase tracking pilot signal transmitted on the reference OFDM symbol.
(4) And performing phase compensation on a first channel estimation result of the pilot signal transmitted on the first OFDM symbol according to the port corresponding relation and the phase adjustment parameter.
In this step, a phase adjustment parameter corresponding to the pilot signal transmitted on the first OFDM symbol is obtained according to the port correspondence. Then, a quotient of a first channel estimation result of the pilot signal transmitted on the first OFDM symbol and a phase adjustment parameter corresponding to the pilot signal transmitted on the first OFDM symbol is used as a result of the phase compensation.
(5) And determining the channel state information according to each first channel estimation result after phase compensation.
It can be seen from the above that, in the embodiment of the present invention, when phase noise exists at the transmitting end or the receiving end, the phase tracking pilot signals of S ports transmitted by the transmitting end can be used for performing phase compensation on channel estimation of pilot signals of different ports transmitted by the transmitting end distributed on different symbols by the receiving end, so as to ensure that channel characteristics experienced by all ports are consistent, and further, accurate channel estimation and calculation of channel state information can be performed.
EXAMPLE III
In this embodiment, it is assumed that the antenna array at the transmitting end has 32 antenna ports as shown in fig. 4, where the antenna port numbers are given, and all the antenna ports have the same phase noise.
As shown in fig. 5, an information processing method according to a third embodiment of the present invention includes:
in step 301, the transmitting end transmits an N (N ═ 32) port CSI-RS.
Wherein each CSI-RS is transmitted on an antenna port with the same number as it. The 32-port CSI-RS is distributed over 4 OFDM symbols in one time unit (subframe), as shown in fig. 6 (assuming one PRB (physical resource block) bandwidth), where ports 0-7 are distributed over OFDM symbol 4, ports 8-15 are distributed over OFDM symbol 5, ports 16-23 are distributed over OFDM symbol 6, and ports 24-31 are distributed over OFDM symbol 7.
In step 302, the transmitting end transmits a phase tracking pilot signal of an S (S ═ 1) port.
The phase tracking pilot signal is transmitted on the OFDM symbols 4, 5, 6, 7 where the N-port CSI-RS is located, and occupies the subcarrier 11. Here, the phase tracking pilot signal of the 1 port corresponds to CSI-RSs of all 32(K ═ 32) ports, and is transmitted using antenna port 0 used by CSI-RS port 0.
In this embodiment, the port mapping relationship is: the phase tracking pilot signals of the 1 port correspond to all 32 CSI-RS ports. The port corresponding relationship is predetermined by the sending end and the receiving end.
And step 303, each receiving antenna port of the receiving end receives the CSI-RS of the 32 ports and the phase tracking pilot signal of the 1 port in OFDM symbols 4-7, and carries out channel estimation respectively.
Here, the result of channel estimation of CSI-RS port i (i ═ 0, …,31) located on OFDM symbol l subcarrier k is denoted as Hi kL, the estimation result of the phase tracking pilot signal is denoted as P1 0 1,l。
And step 304, according to the channel estimation result of the phase tracking pilot signal, taking the OFDM symbol 4 as a reference symbol, and respectively calculating the phase change of the OFDM symbols 5-7 relative to the OFDM symbol 4, namely determining a phase adjustment parameter.
The phase adjustment parameter is calculated according to the following mode:
Figure BDA0001204207000000111
Figure BDA0001204207000000112
Figure BDA0001204207000000113
wherein,
Figure BDA0001204207000000114
indicating the phase adjustment parameters corresponding to OFDM symbol 5,
Figure BDA0001204207000000115
indicating the phase adjustment parameters for the OFDM symbol 6,
Figure BDA0001204207000000116
indicates that the OFDM symbol 7 corresponds toThe phase adjustment parameter of (2);
Figure BDA0001204207000000117
representing the result of the estimation of the phase tracking pilot signal transmitted by the OFDM symbol 4 on the subcarrier 11,
Figure BDA0001204207000000118
representing the result of the estimation of the phase tracking pilot signal transmitted by the OFDM symbol 5 on the subcarrier 11,
Figure BDA0001204207000000119
representing the result of the estimation of the phase tracking pilot signal transmitted by the OFDM symbol 6 on the subcarrier 11,
Figure BDA00012042070000001110
representing the result of the estimation of the phase tracking pilot signal transmitted by the OFDM symbol 7 on the subcarrier 11.
And 305, the receiving end determines that the phase tracking pilot signal of the 1 port corresponds to the CSI-RS of all 32 ports according to the port corresponding relation predetermined by the transmitting end and the receiving end, and performs phase compensation on the CSI-RS channel estimation result by using the estimated inter-symbol phase adjustment parameter.
As shown in fig. 6, since the CSI-RS ports 0 to 7 are located on the reference symbol 4, the channel estimation result does not need to be compensated; for CSI-RS ports 8 ~ 15, use
Figure BDA00012042070000001111
Performing channel compensation to obtain
Figure BDA00012042070000001112
For CSI-RS ports 16 ~ 23, use
Figure BDA00012042070000001116
Performing channel compensation to obtain
Figure BDA00012042070000001113
For CSI-RS ports 24 ~ 31, use
Figure BDA00012042070000001114
Performing channel compensation to obtain
Figure BDA00012042070000001115
And step 306, calculating channel state information by using the compensated channel estimation result of the 32-port CSI-RS.
Specifically, the compensated Channel estimation result of the 32-port CSI-RS is used to calculate the RI (rank indication), the PMI (Precoding Matrix Indicator) and the CQI (Channel Quality Indicator), and the CSI can be fed back.
It can be seen from the above that, in the embodiment of the present invention, when phase noise exists at the transmitting end or the receiving end, the phase tracking pilot signals of S ports transmitted by the transmitting end can be used for performing phase compensation on channel estimation of pilot signals of different ports transmitted by the transmitting end distributed on different symbols by the receiving end, so as to ensure that channel characteristics experienced by all ports are consistent, and further, accurate channel estimation and calculation of channel state information can be performed.
Example four
In this embodiment, it is assumed that the antenna array of the transmitting end has 32 antenna ports as shown in fig. 4, and the antenna port numbers are given in the figure. Two different phase noises are generated by two phase noise sources in the antenna ports, wherein the ports 0-15 have the same phase noise, and the antenna ports 16-31 have the same phase noise.
As shown in fig. 7, an information processing method according to a fourth embodiment of the present invention includes:
in step 401, the transmitting end transmits an N (N ═ 32) port CSI-RS.
Wherein each CSI-RS is transmitted from an antenna port with the same number as it. The 32-port CSI-RS is distributed over 4 OFDM symbols in one time unit (subframe), as shown in fig. 8 (assuming one PRB bandwidth), where ports 0-7 are distributed over OFDM symbol 4, ports 8-15 are distributed over OFDM symbol 5, ports 16-23 are distributed over OFDM symbol 6, and ports 24-31 are distributed over OFDM symbol 7.
In step 402, the transmitting end transmits a phase tracking pilot signal of the 2(S ═ 2) port.
The phase tracking pilot signal of the port 0 corresponds to K-16 CSI-RS ports 0-15, and is transmitted by using an antenna port 0 used by the CSI-RS port 0; the phase tracking pilot signal of the port 1 corresponds to 16 CSI-RS ports 16-31, and is transmitted by using the antenna port 16 used by the CSI-RS port 16. Selecting an OFDM symbol 4 as a reference symbol, transmitting a phase tracking pilot signal of a port 0 on OFDM symbols 4 and 5 where CSI-RS ports 0 to 15 corresponding to the OFDM symbol, transmitting a phase tracking pilot signal of a port 1 on OFDM symbols 6 and 7 where CSI-RS ports 16 to 31 corresponding to the OFDM symbol and the reference symbol 4, wherein the port 0 occupies a subcarrier 11, and the port 1 occupies a subcarrier 12.
Step 403, the transmitting end informs the receiving end of the corresponding relationship of the ports through high-level signaling or dynamic control signaling.
Here, the port correspondence relationship is: the phase tracking pilot signal port 0 corresponds to CSI-RS ports 0-15, and the phase tracking pilot signal port 1 corresponds to CSI-RS ports 16-31.
And step 404, each receiving antenna port of the receiving end receives the CSI-RS of the 32 ports and the phase tracking pilot signal of the 2 ports in OFDM symbols 4-7, and carries out channel estimation respectively.
Here, the result of channel estimation of CSI-RS port i (i ═ 0, …,31) located on OFDM symbol l subcarrier k is represented as
Figure BDA0001204207000000131
Similarly, the estimation result of the phase tracking pilot signal port t (t is 0,1) located on the subcarrier k of the OFDM symbol l is represented as
Figure BDA0001204207000000132
Step 405, the OFDM symbol 4 includes all phase tracking pilot channel ports, and determines the OFDM symbol 4 as a reference symbol. And according to the channel estimation result of the port of each phase tracking pilot signal, phase change of the OFDM symbols 5-7 relative to the OFDM symbol 4 is respectively calculated, namely, phase adjustment parameters are determined.
The phase adjustment parameter is calculated according to the following mode:
Figure BDA0001204207000000133
Figure BDA0001204207000000134
Figure BDA0001204207000000135
wherein,
Figure BDA0001204207000000136
represents the phase change of the OFDM symbol l estimated by the phase tracking pilot signal port t (t is 0,1) relative to the reference symbol;
Figure BDA0001204207000000137
represents the result of the estimation of the phase tracking pilot signal of port 0 of the transmission of the OFDM symbol 4 on the subcarrier 11,
Figure BDA0001204207000000138
represents the result of the estimation of the phase tracking pilot signal of port 0 of the transmission of the OFDM symbol 5 on the subcarrier 11,
Figure BDA0001204207000000139
represents the result of the estimation of the phase tracking pilot signal of port 1 of the transmission of the OFDM symbol 6 on the subcarrier 12,
Figure BDA00012042070000001310
representing the result of the estimation of the phase tracking pilot signal of port 1 of the transmission of the OFDM symbol 7 on the subcarrier 12.
And step 406, the receiving end receives the corresponding relation between the phase tracking pilot signal port and the CSI-RS port informed by the sending end through signaling, determines that the phase tracking pilot signal port 0 corresponds to the CSI-RS ports 0-15 and the phase tracking pilot signal port 1 corresponds to the CSI-RS ports 16-31, and compensates the channel estimated by the CSI-RS by using the estimated inter-symbol phase adjustment parameter.
As shown in fig. 8, since the CSI-RS ports 0 to 7 are located on the reference symbol 4, the channel estimation result does not need to be compensated; for CSI-RS ports 8-15 corresponding to phase tracking pilot signal port 0, use is made of
Figure BDA00012042070000001311
Performing channel compensation to obtain
Figure BDA00012042070000001312
For CSI-RS ports 16 to 23, corresponding to phase tracking pilot signal port 1, use is made of
Figure BDA0001204207000000141
Performing channel compensation to obtain
Figure BDA0001204207000000142
For CSI-RS ports 24-31, corresponding to phase tracking pilot signal port 1, use is made of
Figure BDA0001204207000000143
Performing channel compensation to obtain
Figure BDA0001204207000000144
Step 407, calculating channel state information using the compensated channel estimation result of the 32-port CSI-RS.
Specifically, the compensated channel estimation result of the 32-port CSI-RS is used to calculate the RI, PMI and CQI, and channel state information CSI can be fed back.
It can be seen from the above that, in the embodiment of the present invention, when phase noise exists at the transmitting end or the receiving end, the phase tracking pilot signals of S ports transmitted by the transmitting end can be used for performing phase compensation on channel estimation of pilot signals of different ports transmitted by the transmitting end distributed on different symbols by the receiving end, so as to ensure that channel characteristics experienced by all ports are consistent, and further, accurate channel estimation and calculation of channel state information can be performed.
EXAMPLE five
As shown in fig. 9, an information processing apparatus according to a fifth embodiment of the present invention may be located at a sending end, and include:
a first sending module 501, configured to send pilot signals of N ports to a receiving end, where the pilot signals of the N ports are distributed on M orthogonal frequency division multiplexing OFDM symbols; a second sending module 502, configured to send phase tracking pilot signals of S ports to the receiving end, so that the receiving end performs phase compensation according to the pilot signals of the N ports, the phase tracking pilot signals of the S ports, and a port correspondence relationship obtained by the receiving end according to a predetermined manner, and determines channel state information;
wherein, in the phase tracking pilot signals of the S ports, the phase tracking pilot signal of each port corresponds to the pilot signals of K ports in the pilot signals of the N ports, and the pilot signals of the K ports have the same phase noise; transmitting the phase tracking pilot signal of each port using the antenna port used by one or more of the K ports;
the phase tracking pilot signal of each port is transmitted on the M OFDM symbols and occupies the same subcarrier; or one of the M OFDM symbols is selected as a reference symbol, the phase tracking pilot signal of each port is transmitted on the reference symbol and the OFDM symbol where the pilot signals of the K ports are located, and the same subcarrier is occupied;
wherein, the port corresponding relation is as follows: each of the S ports corresponds to the K ports;
wherein N, M, S and K are integers which are more than 0, and N is more than or equal to K and more than or equal to 1.
Wherein the pilot signal comprises a channel state information reference signal, and the phase tracking pilot signal comprises a phase tracking reference signal or a channel state information reference signal.
As shown in fig. 10, the apparatus further includes: a third sending module 503, configured to send the port correspondence to the receiving end; or a preprocessing module 504, configured to pre-agree the port correspondence with the receiving end.
The working principle of the device according to the invention can be referred to the description of the method embodiment described above.
It can be seen from the above that, in the embodiment of the present invention, when phase noise exists at the transmitting end or the receiving end, the phase tracking pilot signals of S ports transmitted by the transmitting end can be used for performing phase compensation on channel estimation of pilot signals of different ports transmitted by the transmitting end distributed on different symbols by the receiving end, so as to ensure that channel characteristics experienced by all ports are consistent, and further, accurate channel estimation and calculation of channel state information can be performed.
EXAMPLE six
As shown in fig. 11, an information processing apparatus according to a sixth embodiment of the present invention may be located at a receiving end, and include:
a first receiving module 601, configured to receive pilot signals of N ports sent by a sending end, where the pilot signals of the N ports are distributed on M OFDM symbols; a second receiving module 602, configured to receive phase tracking pilot signals of S ports sent by the sending end; an obtaining module 603, configured to obtain a port correspondence; a processing module 604, configured to perform phase compensation according to the pilot signals of the N ports, the phase tracking pilot signals of the S ports, and the port correspondence, and determine channel state information;
wherein, in the phase tracking pilot signals of the S ports, the phase tracking pilot signal of each port corresponds to the pilot signals of K ports in the pilot signals of the N ports, and the pilot signals of the K ports have the same phase noise; transmitting the phase tracking pilot signal of each port using the antenna port used by one or more of the K ports;
the phase tracking pilot signal of each port is transmitted on the M OFDM symbols and occupies the same subcarrier; or one of the M OFDM symbols is selected as a reference symbol, the phase tracking pilot signal of each port is transmitted on the reference symbol and the OFDM symbol where the pilot signals of the K ports are located, and the same subcarrier is occupied;
wherein, the port corresponding relation is as follows: each of the S ports corresponds to the K ports;
wherein N, M, S and K are integers which are more than 0, and N is more than or equal to K and more than or equal to 1.
Wherein the processing module 604 comprises: a channel estimation sub-module, configured to perform channel estimation using the pilot signals of the N ports and the phase tracking pilot signals of the S ports, respectively, to obtain a first channel estimation result of the pilot signal of each port and a second channel estimation result of the phase tracking pilot signal of each port; a first determining sub-module, configured to determine a reference OFDM symbol from the M OFDM symbols, and obtain a second channel estimation result of the phase tracking pilot signal transmitted on the reference OFDM symbol; a calculation sub-module, configured to calculate phase tracking pilot signals transmitted on any first OFDM signal of the M OFDM symbols except the reference OFDM symbol, and phase adjustment parameters with respect to the phase tracking pilot signals transmitted on the reference OFDM symbol, respectively; a phase compensation submodule, configured to perform phase compensation on a first channel estimation result of the pilot signal transmitted on the first OFDM symbol according to the port correspondence and the phase adjustment parameter; and the second determining submodule is used for determining the channel state information according to each first channel estimation result after phase compensation.
Wherein the phase adjustment parameters are: a quotient of a second channel estimation result of the phase tracking pilot signal transmitted on the first OFDM signal and a second channel estimation result of the phase tracking pilot signal transmitted on the reference OFDM symbol.
Wherein the phase compensation sub-module comprises: an obtaining unit, configured to obtain, according to the port correspondence, a phase adjustment parameter corresponding to a pilot signal transmitted on the first OFDM symbol; a processing unit, configured to use a first channel estimation result of the pilot signal transmitted on the first OFDM symbol, and a quotient of a phase adjustment parameter corresponding to the pilot signal transmitted on the first OFDM symbol as a result of phase compensation.
The obtaining module 603 is specifically configured to receive a notification signaling sent by the sending end, and obtain the corresponding relationship according to the notification signaling, where the notification signaling includes the corresponding relationship; or acquiring the corresponding relation agreed in advance with the sending end.
Wherein the pilot signal comprises a channel state information reference signal, and the phase tracking pilot signal comprises a phase tracking reference signal or a channel state information reference signal.
The working principle of the device according to the invention can be referred to the description of the method embodiment described above.
It can be seen from the above that, in the embodiment of the present invention, when phase noise exists at the transmitting end or the receiving end, the phase tracking pilot signals of S ports transmitted by the transmitting end can be used for performing phase compensation on channel estimation of pilot signals of different ports transmitted by the transmitting end distributed on different symbols by the receiving end, so as to ensure that channel characteristics experienced by all ports are consistent, and further, accurate channel estimation and calculation of channel state information can be performed.
It should be noted that the scheme of the embodiment of the present invention may be used for downlink transmission or uplink transmission.
An embodiment of the present invention provides a data processing apparatus, including: a processor; and a memory connected to the processor through a bus interface, the memory being used to store programs and data used by the processor in performing operations, and when the processor calls and executes the programs and data stored in the memory, the memory including functional modules or units implementing:
a first sending module, configured to send pilot signals of N ports to a receiving end, where the pilot signals of the N ports are distributed on M orthogonal frequency division multiplexing OFDM symbols;
a second sending module, configured to send the phase tracking pilot signals of the S ports to the receiving end, so that the receiving end performs phase compensation according to the pilot signals of the N ports, the phase tracking pilot signals of the S ports, and a port correspondence relationship obtained by the receiving end according to a predetermined manner, and determines channel state information;
wherein, in the phase tracking pilot signals of the S ports, the phase tracking pilot signal of each port corresponds to the pilot signals of K ports in the pilot signals of the N ports, and the pilot signals of the K ports have the same phase noise; transmitting the phase tracking pilot signal of each port using the antenna port used by one or more of the K ports;
wherein N, M, S and K are integers which are more than 0, and N is more than or equal to K and more than or equal to 1.
An eighth embodiment of the present invention provides a data processing apparatus, including: a processor; and a memory connected to the processor through a bus interface, the memory being used to store programs and data used by the processor in performing operations, and when the processor calls and executes the programs and data stored in the memory, the memory including functional modules or units implementing:
a first receiving module, configured to receive pilot signals of N ports sent by a sending end, where the pilot signals of the N ports are distributed on M OFDM symbols;
a second receiving module, configured to receive phase tracking pilot signals of S ports sent by the sending end;
the acquisition module is used for acquiring the corresponding relation of the ports;
the processing module is used for carrying out phase compensation according to the pilot signals of the N ports, the phase tracking pilot signals of the S ports and the corresponding relation of the ports and determining channel state information;
wherein, in the phase tracking pilot signals of the S ports, the phase tracking pilot signal of each port corresponds to the pilot signals of K ports in the pilot signals of the N ports, and the pilot signals of the K ports have the same phase noise; the phase tracking pilot signal of each port is transmitted by using the antenna port used by one or more ports in the pilot signals of the K ports;
the phase tracking pilot signal of each port is transmitted on the M OFDM symbols and occupies the same subcarrier; or one of the M OFDM symbols is selected as a reference symbol, the phase tracking pilot signal of each port is transmitted on the reference symbol and the OFDM symbol where the pilot signals of the K ports are located, and the same subcarrier is occupied;
wherein, the port corresponding relation is as follows: a correspondence between each port of the S ports and K ports corresponding to each port;
wherein N, M, S and K are integers which are more than 0, and N is more than or equal to K and more than or equal to 1.
It should be noted that the apparatuses provided in the seventh and eighth embodiments of the present invention are apparatuses capable of implementing the information processing method provided in the foregoing method embodiment, so that all the embodiments of the information processing method provided in the foregoing method embodiment can be applied to the seventh and eighth embodiments, and can achieve the same or similar beneficial effects.
In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the transceiving method according to various embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (20)

1. An information processing method characterized by comprising:
sending pilot signals of N ports to a receiving end, wherein the pilot signals of the N ports are distributed on M Orthogonal Frequency Division Multiplexing (OFDM) symbols;
sending the phase tracking pilot signals of the S ports to the receiving end, so that the receiving end performs phase compensation according to the pilot signals of the N ports, the phase tracking pilot signals of the S ports and the port corresponding relation acquired by the receiving end according to a preset mode and determines channel state information;
wherein, in the phase tracking pilot signals of the S ports, the phase tracking pilot signal of each port corresponds to the pilot signals of K ports in the pilot signals of the N ports, and the pilot signals of the K ports have the same phase noise; transmitting the phase tracking pilot signal of each port using the antenna port used by one or more of the K ports;
wherein N, M, S and K are integers which are more than 0, and N is more than or equal to K and more than or equal to 1.
2. The method of claim 1,
the phase tracking pilot signal of each port is transmitted on the M OFDM symbols and occupies the same subcarrier; or one of the M OFDM symbols is selected as a reference symbol, the phase tracking pilot signal of each port is transmitted on the reference symbol and the OFDM symbol where the pilot signals of the K ports are located, and the same subcarrier is occupied;
the port corresponding relation is as follows: each of the S ports corresponds to the K ports.
3. The method of claim 1, further comprising:
sending the port corresponding relation to the receiving end; or
And the receiving end appoints the corresponding relation of the ports in advance.
4. The method of claim 1, 2 or 3, wherein the pilot signal comprises a channel state information reference signal and the phase tracking pilot signal comprises a phase tracking reference signal or a channel state information reference signal.
5. An information processing method characterized by comprising:
receiving pilot signals of N ports sent by a sending end, wherein the pilot signals of the N ports are distributed on M OFDM symbols;
receiving phase tracking pilot signals of S ports sent by the sending end;
acquiring a port corresponding relation;
performing phase compensation according to the pilot signals of the N ports, the phase tracking pilot signals of the S ports and the corresponding relation of the ports, and determining channel state information;
wherein, in the phase tracking pilot signals of the S ports, the phase tracking pilot signal of each port corresponds to the pilot signals of K ports in the pilot signals of the N ports, and the pilot signals of the K ports have the same phase noise; transmitting the phase tracking pilot signal of each port using the antenna port used by one or more of the K ports;
wherein N, M, S and K are integers which are more than 0, and N is more than or equal to K and more than or equal to 1.
6. The method of claim 5,
the phase tracking pilot signal of each port is transmitted on the M OFDM symbols and occupies the same subcarrier; or one of the M OFDM symbols is selected as a reference symbol, the phase tracking pilot signal of each port is transmitted on the reference symbol and the OFDM symbol where the pilot signals of the K ports are located, and the same subcarrier is occupied;
the port corresponding relation is as follows: each of the S ports corresponds to the K ports.
7. The method according to claim 5 or 6, wherein the performing phase compensation according to the pilot signals of the N ports, the phase tracking pilot signals of the S ports, and the port mapping relationship, and determining channel state information comprises:
respectively using the pilot signals of the N ports and the phase tracking pilot signals of the S ports to carry out channel estimation, and obtaining a first channel estimation result of the pilot signal of each port and a second channel estimation result of the phase tracking pilot signal of each port;
determining a reference OFDM symbol from the M OFDM symbols, and obtaining a second channel estimation result of the phase tracking pilot signal transmitted on the reference OFDM symbol;
calculating phase adjustment parameters of phase tracking pilot signals transmitted on first OFDM symbols except the reference OFDM symbol in the M OFDM symbols respectively relative to the phase tracking pilot signals transmitted on the reference OFDM symbol; wherein the first OFDM symbol is any one of the M OFDM symbols except the reference OFDM symbol;
performing phase compensation on a first channel estimation result of the pilot signal transmitted on the first OFDM symbol according to the port corresponding relation and the phase adjustment parameter;
and determining the channel state information according to each first channel estimation result after phase compensation.
8. The method of claim 7, wherein the phase adjustment parameters are:
a quotient of a second channel estimation result of the phase-tracking pilot signal transmitted on the first OFDM symbol and a second channel estimation result of the phase-tracking pilot signal transmitted on the reference OFDM symbol.
9. The method of claim 7, wherein the phase compensating the first channel estimation result of the pilot signal transmitted on the first OFDM symbol according to the port mapping and the phase adjustment parameter comprises:
obtaining a phase adjustment parameter corresponding to a pilot signal transmitted on the first OFDM symbol according to the port corresponding relation;
and using a first channel estimation result of the pilot signal transmitted on the first OFDM symbol and a quotient of a phase adjustment parameter corresponding to the pilot signal transmitted on the first OFDM symbol as a phase compensation result.
10. The method according to claim 5 or 6, wherein the obtaining the correspondence comprises:
receiving a notification signaling sent by the sending end, and acquiring the corresponding relation according to the notification signaling, wherein the notification signaling comprises the corresponding relation; or
And acquiring the corresponding relation agreed in advance with the transmitting end.
11. An information processing apparatus characterized by comprising:
a first sending module, configured to send pilot signals of N ports to a receiving end, where the pilot signals of the N ports are distributed on M orthogonal frequency division multiplexing OFDM symbols;
a second sending module, configured to send the phase tracking pilot signals of the S ports to the receiving end, so that the receiving end performs phase compensation according to the pilot signals of the N ports, the phase tracking pilot signals of the S ports, and a port correspondence relationship obtained by the receiving end according to a predetermined manner, and determines channel state information;
wherein, in the phase tracking pilot signals of the S ports, the phase tracking pilot signal of each port corresponds to the pilot signals of K ports in the pilot signals of the N ports, and the pilot signals of the K ports have the same phase noise; transmitting the phase tracking pilot signal of each port using the antenna port used by one or more of the K ports;
wherein N, M, S and K are integers which are more than 0, and N is more than or equal to K and more than or equal to 1.
12. The apparatus of claim 11,
the phase tracking pilot signal of each port is transmitted on the M OFDM symbols and occupies the same subcarrier; or one of the M OFDM symbols is selected as a reference symbol, the phase tracking pilot signal of each port is transmitted on the reference symbol and the OFDM symbol where the pilot signals of the K ports are located, and the same subcarrier is occupied;
the port corresponding relation is as follows: each of the S ports corresponds to the K ports.
13. The apparatus of claim 11, further comprising:
a third sending module, configured to send the port correspondence to the receiving end; or
And the preprocessing module is used for appointing the corresponding relation of the ports in advance with the receiving end.
14. The apparatus of claim 11, 12 or 13, wherein the pilot signal comprises a channel state information reference signal, and wherein the phase tracking pilot signal comprises a phase tracking reference signal or a channel state information reference signal.
15. An information processing apparatus characterized by comprising:
a first receiving module, configured to receive pilot signals of N ports sent by a sending end, where the pilot signals of the N ports are distributed on M OFDM symbols;
a second receiving module, configured to receive phase tracking pilot signals of S ports sent by the sending end;
the acquisition module is used for acquiring the corresponding relation of the ports;
the processing module is used for carrying out phase compensation according to the pilot signals of the N ports, the phase tracking pilot signals of the S ports and the corresponding relation of the ports and determining channel state information;
wherein, in the phase tracking pilot signals of the S ports, the phase tracking pilot signal of each port corresponds to the pilot signals of K ports in the pilot signals of the N ports, and the pilot signals of the K ports have the same phase noise; transmitting the phase tracking pilot signal of each port using the antenna port used by one or more of the K ports;
wherein N, M, S and K are integers which are more than 0, and N is more than or equal to K and more than or equal to 1.
16. The apparatus of claim 15,
the phase tracking pilot signal of each port is transmitted on the M OFDM symbols and occupies the same subcarrier; or one of the M OFDM symbols is selected as a reference symbol, the phase tracking pilot signal of each port is transmitted on the reference symbol and the OFDM symbol where the pilot signals of the K ports are located, and the same subcarrier is occupied;
the port corresponding relation is as follows: each of the S ports corresponds to the K ports.
17. The apparatus of claim 15 or 16, wherein the processing module comprises:
a channel estimation sub-module, configured to perform channel estimation using the pilot signals of the N ports and the phase tracking pilot signals of the S ports, respectively, to obtain a first channel estimation result of the pilot signal of each port and a second channel estimation result of the phase tracking pilot signal of each port;
a first determining sub-module, configured to determine a reference OFDM symbol from the M OFDM symbols, and obtain a second channel estimation result of the phase tracking pilot signal transmitted on the reference OFDM symbol;
a calculation sub-module, configured to calculate phase adjustment parameters of the phase tracking pilot signals transmitted on the first OFDM symbol except the reference OFDM symbol among the M OFDM symbols, relative to the phase tracking pilot signals transmitted on the reference OFDM symbol, respectively; wherein the first OFDM symbol is any one of the M OFDM symbols except the reference OFDM symbol;
a phase compensation submodule, configured to perform phase compensation on a first channel estimation result of the pilot signal transmitted on the first OFDM symbol according to the port correspondence and the phase adjustment parameter;
and the second determining submodule is used for determining the channel state information according to each first channel estimation result after phase compensation.
18. The apparatus of claim 17, wherein the phase adjustment parameters are:
a quotient of a second channel estimation result of the phase-tracking pilot signal transmitted on the first OFDM symbol and a second channel estimation result of the phase-tracking pilot signal transmitted on the reference OFDM symbol.
19. The apparatus of claim 17, wherein the phase compensation sub-module comprises:
an obtaining unit, configured to obtain, according to the port correspondence, a phase adjustment parameter corresponding to a pilot signal transmitted on the first OFDM symbol;
a processing unit, configured to use a first channel estimation result of the pilot signal transmitted on the first OFDM symbol, and a quotient of a phase adjustment parameter corresponding to the pilot signal transmitted on the first OFDM symbol as a result of phase compensation.
20. The apparatus according to claim 15 or 16, wherein the obtaining module is specifically configured to receive a notification signaling sent by the sending end, and obtain the corresponding relationship according to the notification signaling, where the notification signaling includes the corresponding relationship; or acquiring the corresponding relation agreed in advance with the sending end.
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