METHOD FOR SOFT DECODING OF A NOISE-IMMUNE CODE Russian patent published in 2020 - IPC H03M13/13 

FIELD: communication equipment.

SUBSTANCE: invention relates to communication engineering and can be used for soft decoding of a noise-immune code in high-noise communication channels. At the input of the decoding device, n symbols of the received noise-immune code are sent with estimates of reliability of symbols. In the decoding device of the noise-immune code, the value s of the number of least reliable symbols of the noise-immune code is first evaluated, then the symbols of the noise-immune code are sorted by reliability and selecting s least reliable symbols and n-s most reliable code symbols. Using the code check matrix, the least reliable symbols are calculated through the most reliable code symbols. Decoding is completed if all verification code ratios are satisfied, otherwise verification is selected in verification matrix, which includes more valid symbols compared to symbols of other checks and calculating the least reliable symbol and its new validity. All checks of the verification matrix are substituted with the newly calculated symbol taking into account the new validity and s-1 least reliable symbols are calculated again.

EFFECT: technical result consists in improvement of decoding efficiency while maintaining high noise immunity.

4 cl