SU692106A1 - Apparatus for receiving digital information - Google Patents

Description

one

The invention relates to telecommunications and can be used to build equipment with a decisive feedback.

A device for receiving discrete information is known, which contains a analyzer and a decoder combined at the input, the output of which is connected to the input of the information receiver via serially connected accumulator and the first valve, to the control input of which, to the control input and to the input "error - second input of the second valve respectively, the outputs of the analyzer 1 are connected.

However, in a known device, when an interference channel interferes, not only the distorted codeblock is repeated, but also subsequent ones, the greater the number of which is, the greater the delay in the transmit-receive loop, and if the codeblock that was distorted in the previous transmission, received correctly, and subsequent with an error, this code block is repeated again, even if it was received without error in the previous transmission. This leads to a large decrease in the speed of information transfer.

The aim of the invention is to increase the speed of receiving information when rechecking information distorted in a communication channel.

For this purpose, in the device for receiving discrete information containing an analyzer and decoder combined at the input, the output of which is connected to the input of the information receiver through the serially connected drive and the first valve, to the control input of which, to the control input, and to the error input "-" re-asking of the second valve, respectively, connected to the analyzer outputs, serially connected control unit and an additional accumulator, with the additional storage information input connected to the output on kofitel, and the output - to the input of the receiver of information, outputs

 through the control unit are connected respectively to the control input of the additional accumulator and to the control input of the second valve.

The drawing shows a structural electrical circuit of the proposed device.

The device for receiving discrete information contains decoder 1, accumulator 2, first valve 3, information receiver 4, analyzer 5, second valve 6, control unit 7. additional accumulator 8. Valve 6 output is output 9 of the recall signal.

The device works as follows

The signal from the communication channel is simultaneously supplied to decoder 1 and analyzer 5. G output decoder 1 information part of the code block in the original code is written to drive 2. If analyzer 5 does not detect an error in the first code block, output of information from drive 2 is allowed through the first valve 3 to the information receiver 4. Otherwise, the analyzer 5 generates a signal "error, which through the second valve 6 is output to the output 9 of the signal" reshoot and to the input of the control unit 7. At the same time, the analyzer 5 supplies to the control input of the valve 3 and a blocking signal. Passing information from accumulator 2 to information receiver 4 is prohibited. The first code block is erased. The blocking signal also acts on subsequent code blocks. At the same time, those from them, no distortions in which were found (starting with the second code block), but the signals from the control unit 7 are written to the drive 8. At the same time, the addresses of the written code blocks correspond to their sequence numbers. The signal "re-inquiry from the communication channel receives a combination of the re-interrogation and a number of the last code blocks. When a recapture combination arrives, the analyzer 5 outputs to the control unit 7 and the valve 6 a signal

“A repeated question, the passage of which through valve 6 is blocked by a signal from the analyzer 5. At the same time, the valve 3 is blocked, which prevents the combination of the repeated question to the information receiver 4 from being issued. When the analyzer 5 receives a signal about the reception of the repeated question, the control unit 7 stops recording the incoming drive 2 information. If, on the first repetition, the first code block is again received with an error, the re-interrogation process is repeated until it is received without error. At the same time, the code blocks received without error are written to the accumulator 8, following the first one without erasing the information previously recorded in this accumulator 8. As a result, accumulator 8 accumulates in accumulator 8, at least once received without error during the initial transmission and subsequent repetition. When receiving, in the process of repeating the first code block, after a fault, the cycle of the re-ask s is canceled. If the next (second)

: the code block is received with an error, and in: .. the storage unit 8 stores this unit from the previous transmission, the control unit 7 reads this unit from the storage unit 8 to the information receiver 4 instead of the locked one from storage unit 2. At the same time, the control unit 7 outputs a blocking signal to the control input of the valve 6, and the signal "no reshoot is given. If there is no error, this code block is output from accumulator 2. If the second code block is received with an error, but is not in accumulator 8, valve 6 is not blocked by control unit 7, and the reshoot process continues until the correct time. In any case, after the first attempt to receive the second code block (regardless of its result), the control block 7 reduces by one the addresses of 8 code blocks in the accumulator. In the process of repeating the second code block, the third and quarter code blocks are written to the memory 8, taking into account the changed address. The reception of the third and subsequent code blocks is performed similarly to the reception of the second code block.

When using I of the proposed device, the speed of information transfer increases when the information distorted in the communication channel is recaptured due to the accumulation of code blocks received without error both during the initial transmission and when they are repeated due to distortions in the communication link and output to the receiver The ipformatization of code blocks from among the accumulated ones, if the next code block is received with an error, and among the accumulated ones there is an analogous code block without an error. No re-request is done, and no re-transmission time is wasted. The rate of increase in speed depends on the amount of information transmitted during a reshoot and the greater, the larger this volume, as well as on the distribution of errors in the communication channel.

Claims (1)

Invention Formula A device for receiving discrete information containing a analyzer and a decoder connected at the input, the output of which is connected to the input of the information receiver through serially connected accumulator and the first valve, to the control input of which, to the control input and to the input "error -" re-request of the second valve are connected respectively, the outputs of the analyzer, limited by the fact that, in order to increase the reception speed. information when reclaiming information distorted in a communication channel, serially connected control unit and additional storage device are entered, the informational input of the additional storage device is connected to the output of the storage device, and the output tricks to the input of the information receiver, the outputs “error” and “analyzer re-request through to the additional input of the storage device and to the control input of the second valve. Sources of information taken into account in the examination 1. Purtov L. P. and others. Elements of the theory data transmission. Channels. Codes. Systems L., “VKAC, 1968, p. 176 (prototype).