SU495776A1 - Method of transmitting digital signals - Google Patents

Description

through the regenerator 14 and the divider circuit 15 by the pre-decoder code 16. The other input is connected to the frequency divider 15, and the outputs are connected to the regenerator 14 and the sealing set 17, the second input of which is connected to the code converter K). The output of the filter circuit 1 1 is connected to the upper part of the compaction equipment 18.

The transmission system of digital eiiriia, TOB works in the following way.

The clock signal from the compressed air supply 1 is connected to a multiplier of 3. The resulting voltage of the subcarrier frequency is fed to a phase modulator 4, to which a modulating digital signal is supplied from code converter 2. The phase modulated subcarrier frequency is fed through the filter system 5 to the input of the frequency modulator 6, and the input to the terminal equipment. Through the filter system 5, the group signal of a multi-channel telephony from the compaction equipment 8 also arrives at the input of the frequency modulator 6. The output signal of the frequency modulator 6 is fed to the transmitter 7.

At the irienem end of the connection, receiver 9 receives a signal at frequency detector 10, to the output of which is a keynote of the filter system P. From the output of the filter system 11, the modulated spindle signal is fed to the H1, it goes to the phase detector

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-12 . It is nano female; 1l (1) az () B (the Io detector is produced by the device |) with the implementation of the selection of the 1 1 signal of the current frequency 13.

From the output of the phase detector 12 pfvrov signal arrives at pereiiepaTOp 14 and far; through an inverter code 16 pa of the equipment of pilot 17 (in the terminal end mode ||) PL1 to the annotation of the introduction of pfr e1 gpals into the high-frequency trunk (in the mode of intermediate station e regeneration).

The clock voltage is formed in the frequency divider 15 and is supplied to the regenerator 14, the code 16 converter, as well as to the compaction equipment 17.

From the output of the filtering system, the 1 1 spgial megapal telephony is fed to the receiving part of the seal aerial 18 (in the terminal station mode).

Form m Y l and p 3 about b 1 e te p and

The method of transmitting digital signals is multi-channel telephony signals by phase modulation of the subcarrier frequency, about the fact that, in order to increase the reliability of information transmission by arbitrary statistics of digital signals, the signal spednal frequency is multiplied by multiplying the clock frequency of the discrete message, and A clock frequency is obtained by dividing the frequency of the signal at that sub-frequency and then phasing it.

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8 L