FR2339291A1 - Digital data transmission method - uses phase modulation of carrier wave and removes ambiguity arising from phase reference of carrier - Google Patents

Digital data transmission method - uses phase modulation of carrier wave and removes ambiguity arising from phase reference of carrier

Info

Publication number
FR2339291A1
FR2339291A1 FR7601836A FR7601836A FR2339291A1 FR 2339291 A1 FR2339291 A1 FR 2339291A1 FR 7601836 A FR7601836 A FR 7601836A FR 7601836 A FR7601836 A FR 7601836A FR 2339291 A1 FR2339291 A1 FR 2339291A1
Authority
FR
France
Prior art keywords
carrier
carrier wave
data transmission
digital data
transmission method
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7601836A
Other languages
French (fr)
Other versions
FR2339291B1 (en
Inventor
Marc Rene Liger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Societe Anonyme de Telecommunications SAT
Original Assignee
Societe Anonyme de Telecommunications SAT
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Societe Anonyme de Telecommunications SAT filed Critical Societe Anonyme de Telecommunications SAT
Priority to FR7601836A priority Critical patent/FR2339291A1/en
Publication of FR2339291A1 publication Critical patent/FR2339291A1/en
Application granted granted Critical
Publication of FR2339291B1 publication Critical patent/FR2339291B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
    • H04L27/2035—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using a single or unspecified number of carriers
    • H04L27/2042—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using a single or unspecified number of carriers with more than two phase states
    • H04L27/2046—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using a single or unspecified number of carriers with more than two phase states in which the data are represented by carrier phase

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

The method of digital signal transmission uses phase modulation of a carrier wave. The digital signal is split up into a series of q binary elements. These correspond to each of n = 2q levels which can be taken by a series of q elements with state of phase xi of a carrier wave. The n state of phase x1......xn are chosen with respective appearance probabilities of P1....Pn for at least one of the sums (between i = 1 and i = n) Pi cos xi and Pisinxi not equal to zero. When all the probabilities P1....Pn are equal x1 and xn are separated by 4 (pi)/(n+1), and xi and xi+1 are separated by 2(pi)/(n+1).
FR7601836A 1976-01-23 1976-01-23 Digital data transmission method - uses phase modulation of carrier wave and removes ambiguity arising from phase reference of carrier Granted FR2339291A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7601836A FR2339291A1 (en) 1976-01-23 1976-01-23 Digital data transmission method - uses phase modulation of carrier wave and removes ambiguity arising from phase reference of carrier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7601836A FR2339291A1 (en) 1976-01-23 1976-01-23 Digital data transmission method - uses phase modulation of carrier wave and removes ambiguity arising from phase reference of carrier

Publications (2)

Publication Number Publication Date
FR2339291A1 true FR2339291A1 (en) 1977-08-19
FR2339291B1 FR2339291B1 (en) 1981-06-19

Family

ID=9168298

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7601836A Granted FR2339291A1 (en) 1976-01-23 1976-01-23 Digital data transmission method - uses phase modulation of carrier wave and removes ambiguity arising from phase reference of carrier

Country Status (1)

Country Link
FR (1) FR2339291A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2453560A1 (en) * 1979-04-05 1980-10-31 Licentia Gmbh METHOD FOR THE PRODUCTION OF AMPLITUDE MODULATED MODEM TRANSMISSION SIGNALS IN QUADRATURE MAQ
EP0475165A2 (en) * 1990-09-11 1992-03-18 ANT Nachrichtentechnik GmbH Method for producing a QPSK signal with a superposed carrier

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2127517A1 (en) * 1971-06-03 1972-12-14 Licentia Gmbh Modulation method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2127517A1 (en) * 1971-06-03 1972-12-14 Licentia Gmbh Modulation method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2453560A1 (en) * 1979-04-05 1980-10-31 Licentia Gmbh METHOD FOR THE PRODUCTION OF AMPLITUDE MODULATED MODEM TRANSMISSION SIGNALS IN QUADRATURE MAQ
EP0475165A2 (en) * 1990-09-11 1992-03-18 ANT Nachrichtentechnik GmbH Method for producing a QPSK signal with a superposed carrier
EP0475165A3 (en) * 1990-09-11 1992-06-17 Ant Nachrichtentechnik Gmbh Method for producing a qpsk signal with a superposed carrier
US5289503A (en) * 1990-09-11 1994-02-22 Ant Nachrichtentechnik Gmbh Method and circuit arrangement for producing a QPSK signal on which a carrier signal is superposed

Also Published As

Publication number Publication date
FR2339291B1 (en) 1981-06-19

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