SU641672A1 - Arrangement for digital transmitting and receiving of telephone signals - Google Patents

Description

the output of the amplitude-pulse modulator of each channel unit is connected via the shaper of a group pulse-amplitude signal to the input of the encoder, to the control input of which and to the control input of the amplitude-pulse modulator the corresponding outputs of the transmitting generator equipment are connected, the third output of which is through the shaper of the common clock signal connected to one of the inputs of the combining unit, to the other input of which the output of the cold swept generator is connected, and at the receiving side - connected to the input of The common signal receiver and receiving generator equipment, to another input of which the common clock receiver receiver output is connected, and the outputs of receiving generator equipment are connected to the corresponding inputs of the separation unit and decoder and to one of the selector inputs of each channel unit, to another input of which the output of the separation unit is connected through the decoder, in addition, the output of the separation unit is connected to the input of the receiver of the VCS; on the transmitting side, the driver of the individual sync signal connected between the output generator equipment, and a transmission unit and an additional input of the combination unit, and on the receiving side, k receivers of individual sync signals and a memory block, with k receivers of individual sync signals connected between the receiver input of the common sync signal and the corresponding inputs of the receiving generator equipment, the memory block is connected between the common sync signal receiver input and additional outputs of the receiving receive equipment, and the memory unit output is connected to the input of the separation unit.

The drawing shows the structural diagram of the device.

The device for digital transmission and reception of telephone signals comprises, on the transmitter side, n channel units 1, each of which includes an amplitude-pulse modulator 2, a selector 3, a driver 4 and a receiver 5 for control and interaction signals (CMS). The output of the amplitude-pulse modulator 2 of each channel unit I is connected via a generator 6 of a group pulse-amplitude signal to the input of the encoder 7, to the control input of which and to the control input of the amplitude pulse modulator 2 the respective outputs of the generator equipment 8 are connected. The third output of the equipment 8 through the common synchronization driver 9 is connected to one of the inputs of the combining unit 10, to the other input of which the output of the final generator 4 of the CS is connected.

At the receiving side are combined at the input of the receiver II common signal and. receiving equipment 12, to the other input of which is connected the output of the receiver I 1 of the common clock signal. The outputs of the generator equipment 12 reception are connected to the corresponding inputs of the separation unit 13 and the decoder 14 and to one of the inputs of the selector 3 of each channel unit I. To the other input of which the output of the separation unit 13 is connected through the decoder 14. In addition, the output of the separation unit 13 is connected to the input of the receiver 5 of the CMS. An individual sync driver 15 is connected between the output of the generator equipment 8 of the transmission and the auxiliary input of the integration unit 10.

On the receiving side k of the receivers, 16 individual sync signals are included between the receiver input AND of the common power and the corresponding inputs of the receiving equipment 12. The memory block 17 is connected between the input of the common-signal receiver i I and the additional outputs of the receiving equipment 12, and the output of the memory block 17 is connected to the input of the separation unit 13. The channel blocks 1 also include the Differential {) Equipment Block 18, low-pass filters 19, 20.

The device works as follows. The telephone signals of the N subscribers entering the corresponding channel blocks 1 are fed through the differential block 18 and the low-pass filter 19 to the inputs of the amplitude-pulse modulators 2.

The operation of the amplitude-pulse modulators 2 is carried out by generator transmission equipment 8. The signals from the outputs of all n amplitude-pulse modulators 2 are combined into a group amplitude-pulse signal in the shaper 6 of a group amplitude-pulse signal, the signal from the output of which enters the input of the encoder 7, where / is transformed into a sequence of k-bit code groups, corresponding to each of the N telephone channels.

To each code group in block 10, a single character is added for transmitting the BMS produced by shaper 4, and in addition, a common and individual sync signals are input from the shaper 9 common synchrsignal and from the shaper 1 $ n Wjtt output of the sync signals.

The common sync signal is designed to determine the temporal position of the constituent streams in a cycle, and the individual sync signals to correctly decode and distribute the code groups in each of the streams.

At the receiving side, a common sync signal is allocated from the group digital signal in the common synchronization signal receiver 11, and in the individual sync signal receiver 16, the number of which is equal to the number of system streams, the individual sync signals are extracted. In parallel, a group digital signal is fed to the input of zanomotion unit 17, the number of memory cells in which is determined by the product of K, i.e. the number of characters in the code groups and the number of constituent streams. The information is read in sequences from the outputs of the geoeratoric equipment 2 of the reception controlled by individual sync signals. The reading from the memory block 17 is carried out in accordance with code groups corresponding to individual samples of amplitude-pulse modulation according to signals from the 1.2 ... gates of the generator equipment 12 of the reception.

In separation unit 13, SUs B are received that are fed to receiver 5 of SUV channel unit 1. Decoder 14 converts the sequence of code groups into an amplitude-pulse signal, which through the selector 3, low pass filter 20 and differential block 18 goes to the subscriber.

If the group signal generated by the digital stream combining device enters the input part of the digital transmission and reception device of the telephone signals, the common synchronization signal receiver 11 divides this signal into component streams, and the individual sync receivers 16 ensure correct decoding of code groups within each stream .

In turn, when a group signal generated by the transmitting part of this device arrives at the input of the receiving part of the device, similarly, the receiver I of the common sihroshygal ensures separation of the group signal and component streams, and for each of the sync signals generated by the shaper 15 individual sync signals, Correct decoding of the groups and distribution of the amplitude-pulse signals in the receiving part of each of the component streams.

Claims (1)

Invention Formula A device for digital transmission and reception of telephone signals containing the transmitting side of the p-channel blocks, each of which includes an amplitude-pulse modulator, a selector, a driver and a receiver of control and interaction signals (CS), with the output of the amplitude-pulse modulator of each the channel unit is connected via a group amplitude-pulse signal shaper to the encoder input, to the control input of which and to the control input of the amplitudes of the pulse-modulator are connected generator outputs of the transmission, the third output of which is connected to one of the inputs of the combining unit through the driver of the common sihrosigial, to the other input of which is connected the output of the generator CMS, and  the receiving side - the common signal receiver and the receiving receiving equipment integrated to the other input of which the common clock signal is connected, and the outputs of the receiving generator equipment are connected to the corresponding inputs of the splitter and decoder and to one of the selector inputs of each channel unit to the other the output of which is connected to the output of the separation unit through a decoder, in addition to the output of the separation unit 25 is connected to the input of the receiver of the BMS, characterized in that, in order to increase the efficiency of use of the device by transmitting and receiving telephone signals in the form of K combined independent digital signals. on the transmitting side, the driver of individual sync signals is connected between the output of the transmitting geoerator equipment and the auxiliary input of the combining unit, and on the receiving side there are k receivers of individual sync signals and a memory block, while k receivers of individual sync signals are connected between the receiver input of the common sync signal and the corresponding inputs of the receiving generator equipment, the memory unit is connected between the common clock receiver input and the additional outputs receive generator equipment, and the output of the memory unit is connected to the input of the separation unit. Sources of information) and {, taken into consideration at the examination: I. Sakachita Tokayshi, Mijake Nobuo. A 120-chanall PCM System for Symmetrical pairs. The PCM-120 system. - “Japan Teiecomuns Rev 1969, II. N 3, p. 143-145. LO-I fBMS