FIELD: communications engineering; data transfer, telemetering, and telecontrol systems.
SUBSTANCE: on sending end output sequence in the form of modulo two sum of noise-immune recurrent code and synchronizing sequence are shaped; on receiving end sequence received is decoded; to this end sequence received is first multiplied by check polynomial, then definite combination of synchronizing sequence is detected including errors and upon detection of definite combination of synchronizing sequence including errors decision is taken on occurrence of frame synchronization; noise-immune code is separated and then error combination is evaluated and errors are corrected; on sending end output sequence is recurrently continued and on receiving end recurrent continuations of received sequence are generated from received sequence characters; then recurrent continuations of received sequence are additionally decoded.
EFFECT: enhanced noise immunity of recurrent code received.
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