SU1203715A1 - Digital information transmission system - Google Patents

Abstract

This invention relates to a multichannel wired connection. The purpose of the invention is to improve noise immunity. The transmitted and received pulses have a phase shift equal to half the clock interval or. The transmitted pulses, having passed the cable line and the delay line (LZ) 17, are received for intermediate station 3. These pulses are restored in the reverse channel regenerator 1 1. The transmitted pulses back and received are phased with the help of LZ 9 and time discriminator 7 so that the phase shift between them is equal to half a clock interval or 180. The pulses passed by LZ 9 acquire an additional phase shift and, having passed the cable line, are received by terminal station 2. They are out of phase by half of the clock interval or by SO with respect to the transmitted pulses. Further along the line in the direction of the terminal station 1 - The system works in a similar way. 2il. i (L N9 O CO VI

Description

The invention relates to the field of multi-channel wired communication and can be used in digital information transmission systems using pulse code or delta modulation.

The purpose of the invention is to increase the noise resistance.

Figure 1 shows the structural-electrical system diagram; on. Fig. 2 - diagrams {apr of the descriptions, which explain its work.

The system contains the first terminal station 1., the second terminal station 2 and intermediate stations 3, the first terminal station 1 contains the key 45 of the forward channel 5 generator, the reverse channel regenerator 6, the time discriminator 7, the transmission channel separation unit 8 n. Linyu 9 delays, the second terminal station 2 contains the key 4 regenerator 5 forward channel, Regene 1. reverse channel 6 and block 8

separation of transmission channels, and the calsdal of the intermediate station 3 contains the regenerator 10 of the forward transmission channel, the regenerator 11 of the reverse transmission channel, the first block 12 of the transmission channel separation, the first key 13., the second block 14 of channel separation j the second key 15, the time discriminator 16 and line 17 delay.

The digital information transmission system works in the following way.

The transmitted pulses (figs, 2d-) and received (figg) are arranged in time so that the phase shift between them is equal to half the clock interval or 180 °. The cable line between the terminal station 2 and the intermediate station 3 introduces a phase shift, and the delay line 17 introduces an additional phase shift such that the condition: & + 1 360 N where N is an integer (1,2,3, ...) The transmitted pulses (Fig. 2e), the cable line (Fig. 2e) and the delay line 17 (Fig. 2g) are accepted for intermediate Station 3. These pulses (Fig. 2g) are restored in the reverse channel regenerator 11 (Fig. 2d), the transmitted pulses back (Fig. 2b) and the received (Fig. 2a) 5 are phased out using the delay line 9 and the time discriminator 7 so that the phase shift between them is equal to half tact

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 180 °. The pulses (Fig. 26), having passed the delay line 9, acquire an additional phase shift t (Fig. 2b) and further, pass the cable line (Fig. 2d), are received by the terminal station 2 and are out of phase by half a clock interval or 180 ° relative to the transmitted pulses (figd). Further along the line - in the direction of the terminal station 1 - the digital information transmission system works in a similar way.

Claims (1)

Invention Formula A digital information transmission system comprising two end stations and intermedi- ate stations. Each terminal station contains: it is a forward channel regenerator and a reverse channel regenerator, a transmission channel separation unit and a key, and the output terminal is the regenerator of the forward transmission channel is connected to the first output of the transmission channel separation unit, the second output of which is connected via a key to the input of the regenerator, the reverse transmission channel, the control input of the key is connected to the output p The generator of the forward transmission channel, at the second terminal station, the output of the regenerator of the reverse transmission channel is connected to the first output of the transmission channel separation unit, the second output of which is connected via a key to the input of the regenerator of the forward transmission kangsh, the control input of the key is connected to the output of the reverse channel regenerator transmission, and at each intermediate station, the output of the regenerator of the forward transmission channel is connected to the first port of the first block of transmission channel divisions, the second one through which the first key Connected to the input of the reverse transfer channel regenerator, the output of which is connected to the first output of the second transmission channel separation unit, the second output of which through the second key is connected to the input of the regenerator of the forward transmission channel, the charging inputs of the first and second switches are connected to the outputs of the direct regenerator respectively the transmission channel and the regenerator of the reverse transmission channel j are characterized in that, in order to improve the noise immunity, the first terminal and each intermediate station introduced delay lines and a time discriminator, while at the first terminal station the inputs of the temporary discriminator are connected to the output of the reverse transmission channel regenerator and the second output of the forward transmission channel regenerator, the third output of the transmission channel separation unit The output of the delay line whose control output is connected to you the time of the discriminator, and at each intermediate station the inputs of the temporal discriminator are connected to additional outputs of the forward transmission channel regenerator and the reverse transmission channel regenerator, the third step of the first transmission channel separation unit is connected to the signal delay terminal of which is connected to the output of the temporary discriminator . vniipi Circulation 658 Order 8431/61 Subscription Branch PGS Patent, Uzhgorod, Proektna St., 4