FIELD: communication technology.
SUBSTANCE: invention relates to communication technology. The effect is achieved due to the method for code frame synchronization for the concatenated code when applying hard decisions, which relates to discrete information transmission systems. The input sequence consists of several consecutive words, each of which is a bitwise modulo two sum of an error-correcting cyclic code, a numbering sequence, and a phasing sequence. In order to exclude possible triggering of false block synchronization, at the end of each numbering sequence, the value of its match counter is compared with all match counters of the remaining labels. If, at the end of each numbering sequence, the value of its match counter exceeds or becomes equal to the threshold value and exceeds the value of any match counter of all marks, then a decision is made on code framing of the input sequence, while resetting all match counters. To maximally exclude false synchronization of blocks, after determining the correct synchronization, a counter is started for a period of time corresponding to the duration of the transmission of one block, and if at the end of the count confirmation of the correct synchronization of the block comes, then during further transmission of blocks, all possible false synchronization responses are ignored inside the true blocks from the code blocks. words, and with each next transmission of the block, the correct synchronization of the block is confirmed.
EFFECT: increasing the reliability of the received information by increasing the probability of correct block synchronization.
2 cl, 3 tbl
