SU748895A1 - Apparatus for receiving information in discrete systems with positive-control feedback - Google Patents

Description

The device for receiving discrete information in systems with decisive feedback contains a block I matching decoder 2, accumulator 3, decision block 4 control block 5, feedback signal transmitter b, two registers 7, 8 iteration numbers of repetitions, counter 9, key 10, decryptor 11 repetitions.

The device works as follows.

The shift register 12 formed by the first and second registers 7, 8 numbers of iterations of iterations and counter 9 is intended for storing and changing the numbers of iterations of iterations for all code blocks stored in accumulator 3. Moreover, the number of iteration iterations for the last received block is stored in counter 9. If the supplied code block entered decoder 2 for the first time, then zero is recorded in counter 9. If a given received block is repeated the first (second, third ...) times, that by the moment of receiving this block, counter 9 is respectively recorded 1 (2, 3 ...). Analyzing the value of the number stored in the counter 9 or temporarily rewritten during the iterative repetition in registers 7 and 8, the control of the repetition process is performed, which results in a decision on the number of required blocks after the sequential detection of errors.

If no error is detected in the received code block, then a "confirmation from relay block 4" signal is shifted in shift register 12 by one sector. At the same time, there is a shift in the drive 3 of the reception and the recording of the received message in it.

If an error is detected in the received block, the error code 11 polls the decoder 11, which receives the value of the repeat number from counter 9, corresponding to this received code block. At the same time, the contents of counter 9 are incremented by one.

After that, the entire shift register 12 is shifted by the number of sectors corresponding to the value stored in the counter 9 until the last error signal.

Consider three typical situations of the device, taking into account that the maximum iomer of iterations of the equation X.

If after detecting an error in the counter 9 is stored "O, then the shift of the register 12 does not occur, the transmitter of the 6 channel reverse channel receives a request to repeat one block with the detected error, the drive 3 does not shift, the number" 1 is recorded in the counter 9.

If in the counter 9, after detecting an error, the number 1 t X - 1 is written, it means that this block was accepted

decoder 2 t times and t times an error was detected. B. In this case, a request is sent to repeat (t + 1) the block to the transmitter of the 6th channel of the reverse channel, in the accumulator 3 the t of the previously received block is erased, and in the counter 9 the number t increases to t + I.

Then the shift register 12 is shifted by t sectors so that after receiving the first of the repeated blocks in the counter 9, the number corresponding to the number of iterations for this block is written, i.e. the synchronization must be ensured.

If, after obiaruchey of an error in the counter 9, the number X-1 is recorded, in addition to issuing the reverse channel number X-1 to the control and transmitter 5, the contents of registers 7 and 8 and counter 9 are erased.

The beginning of a new cycle of repetition will be started after the next error detection by the decoder 2.

Claims (1)

Invention Formula A device for receiving discrete information in systems with a decisive feedback, containing a block that is matched, the output of which through a decoder is connected to the accumulator input, to the control input of which the output of the control unit is connected, to the input of which and to the one of the reverse channel signal transmitter connect the output a decisive unit, to the input of which a test decoder output is connected, characterized in that, in order to increase the speed of receiving discrete information, a counter, two registers of iteration numbers of repeats, are entered, the repeat code decoder and key, while the output of the decision block is connected to the input of the first register of iteration numbers of repetitions connected via the counter with the second register of iteration numbers of iterations, and the output is “the error of the decision block to the corresponding input of the counter and to one of the inputs to the decoder of the repeat box directly and to the corresponding input of the second register of the iomers of iteration of repetitions through a key, to the control input of which and to the other input of the decoder of repetitions the corresponding counter output is connected, to the input erasure of which and to the inputs of erasing the first and second registers of iteration iteration numbers is connected to the output of the replicator decryptor; This output is connected to a control unit and a reverse channel signal transmitter. . Sources of information taken in review during examination 1. USSR Copyright Certificate No. 478447, cl. H 04 L 1/10. 1972 (prototype;