SU593319A1 - Method of transmitting discrete information - Google Patents

Description

(54) METHOD FOR TRANSFERRING DISCRETE INFORMATION

operating sequences on output device 18 with temporary storage.

Devices 4 and 12 transforms can be performed, for example, but a multiplication modulo module of an irreducible polynomial, with the information and coding sequence combinations being considered as factors. Another embodiment of converting devices 4 and 12 modulo an irreducible polynomial is a recurrent shift register, which forms a sequence of maximum length, with the coding sequences being fed to the input of the shift register.

Information is transmitted in groups consisting of / (blocks. The next block of information in the form of an n-bit combination comes from the source to input device 1, then to register 3 of coding and sequences, and through prohibition element 2 to device 4 that modulo irreducible polynom. Stored in register 3 is the combination of the previous block 4 of the transform but the module of an irreducible polynomial, and the sequence known for the reception and transmission is taken to encode each of the first A / C blocks from register 3.

The encoded block enters the transmitter 8 and then into the communication channel. In a similar way, the transmission of "To information blocks. After the transfer of the (block), the counter 7 outputs a signal, the prohibition closing element 2 and the opening key 5, and the control unit known at the receiving side is not received by the g module of the irreducible polynomial from the sensor 6.

Next, encoding (modulo an irreducible polynomial) of the control unit is performed using the information block / (-th) as the coding sequence. The encoded control unit is transmitted to the communication channel. blocking signal. Further reception of information from the source is blocked, a repeated transmission from the temporary accumulator of all information blocks occurs, and the control block is in which an error is detected at the receiving side. At the receiving side, a block arriving from the communication channel to the receiver 10 is inserted into the inverse device modulo an irreducible polynomial 12.

As a decoding sequence for all blocks except the first of the group in K. blocks, a delayed combination of the previous decoded block is fed from the register 17 of decoding sequences to the inverse transform device 12. To decode each first of K.

The blocks from register 17 are fed to a known at the receive and transmit sequence. The decoded (modulo irreducible polynomial) combination through the prohibition element 16 is fed to the output device 18 and simultaneously recorded in the register 17 of the decoding sequences.

Each / (+ 1 block, which is a control, via key 13, controlled by a counter

15 enters solver 14, where it is compared with an a priori known value. The absence of errors in the control unit indicates the correctness of the reception of the previous / C information

blocks. When a mismatch of the received control unit is detected with its known value, the resolver 14 issues an error signal that blocks the delivery of information to the consumer from the temporary storage device of the output device 18 and skips the return channel transmitter And, which generates the request.

This invention improves the reliability of the transmission of discrete information, kr.ome

Moreover, by increasing or decreasing the follow-up period of the control units / C, an adaptation of the characteristics of the equipment to a change in the channel state can be achieved.

Claims (1)

1. USSR author's certificate No. 462296, cl. П 04L 1/10, published. 03.03.72.