SU497617A1 - Device for transmitting discrete information - Google Patents

Description

one

The invention relates to communication technology and can be used in data transmission equipment.

It is known a device comprising, on a transverse side, a serially connected information source, a modulator and an output amplifier, and on a receiving side, serially connected input amplifier, a switching filter unit, a detector unit, a decoder and an output register.

However, the known device has a low effective rate of non-transmission of information.

The purpose of the invention is to increase the effective speed of information transfer.

For this purpose, serially connected null-organ and counter are connected between the control input of the information source and the modulator output, and on the receiving side, serially connected null-organ, counter, trigger, and The key is also a single trigger input connected to the output of the detoctor unit.

The drawing shows the block diagram of the proposed device.

A device for transmitting discrete information comprises, on a transmission side, serially connected information source 1, modulator 2 and output amplifier 3; on the receiving side - serially connected input amplifier 4, block 5 of switched filters, block 6 of detectors, decoder 7 and output register 8. On the transmitting side, in series between the control input of the information source 1 and the output of the modulator 2 are connected serially connected ilulg 9 and a counter 10, but on mr

to the side, between the output of the input interface 4 and the input of the block 5 of switched filters, the series-connected null-organ 11, the counter 12, the trigger 13 and the key 14 are connected. In addition, a single

the thrunger input 13 is connected to the output of the detector block C.

The device works as follows. The transmitted signal comes from source 1 to modulator 2, where it is converted to

a sinusoidal signal that is transmitted through the output amplifier 3 to the communication channel 15. At the same time, the signal from the output of the modulator 2 arrives at the input of the zero-organ 9, which forms pulses corresponding to the passage of the sinusoidal signal through zero. The null-generated 9 impulses are fed to the input of the counter 10, the counting cycle of which is determined in advance by the required elementary duration of the transmitted signal. The duration of a parcel is determined by the maximum integration time on the switched filter until the trigger element is triggered and the signal is extinguished at the output of the filter | a on the receiving side. The signals from the output of the counter 10 switch the source 1 of information through the time determined by the duration of the parcel in accordance with the incoming information and the specified cycle of the counter 10. In this case, the frequency switching by the modulator 2 occurs at the moments of the signal going through a zero value. The signal received from channel 15 is fed to the input amplifier 4 and from its output to the input of the block 5 of switched filters and simultaneously to the input of the null organ 11, which forms: pulses passing a sinusoidal signal through zero. Null-matched null-organically 11 pulses are fed to the input of counter 12, which has the same counting cycle as counter 10. The output of counter 12 is connected to the zero control input of trigger 13, the unit input of which is supplied with a threshold element of block 6. Trigger output 13 connected to the input of the key 14 of the slaking. Upon receipt of the signal on the input of the block of 5 switched filters, it is integrated on the corresponding filter. After the threshold device of the detector unit 6 is triggered, the leading edge of the pulse is formed, the leading edge of which is determined by the signal at the output of the blanking key 14. The signals from the output of the detector 6 are fed to the input of the decoder 7 and then the output register 8,

from the output of which the received signals arrive at the input of the error detection block 16. If errors are detected in the received signals, then the transmitter 17, via the feedback channel 18, transmits to the input of the receiver 19 errors detection signals, which are fed to the information repetition unit 20. Block 20 generates a repetition signal for erroneously received information, which is fed to the control input of information source 1, while erroneously received information is transmitted for the second time over channel 15 with a corresponding correction.

Subject invention

A device for transmitting discrete information, containing on the transmitting side a serially connected information source, a modulator and an output amplifier, and on the receiving side, serially connected input amplifier, a switching filter unit, a detector unit, a decoder and an output register, characterized in that increase effective

information transfer rates, on the transmitting side between the control unit input of the information source and the modulator output are connected in series nullorgan and counter, and on the receiving side between the output amplifier input and the input of the switched filter unit are connected in series the null organ, counter, trigger and key blanking in addition, a single trigger input is connected to the output

block detectors.