| 摘要 |
FIELD: radio engineering, communication.SUBSTANCE: invention relates to communication engineering and can be used for soft-decision decoding of a noise-immune code in systems for transmitting digital messages over communication channels with high level of interference. Depending on the reliability of symbols of the noise-immune code, the method includes estimating the signal-to-noise ratio in the communication channel, using the signal-to-noise ratio to determine communication channel quality, calculating block probability distribution of the number of errors in the noise-immune code and determining the maximum number of errors in the noise-immune code to be corrected and using the number of errors to estimate the value s of the least reliable symbols of the noise-immune code. The method further includes generating 2versions of the noise-immune code, performing hard-decision decoding of all 2versions of the noise-immune code and correcting errors in each of said versions, comparing each of the 2versions of the decoded noise-immune code on Hamming distance with the received noise-immune code and obtaining a set of 2Hamming distances and obtaining, at the output of a decoder, the information part of the decoded noise-immune code which corresponds to the minimum Hamming code distance from the set of 2Hamming distances.EFFECT: high noise-immunity of reception.4 cl |
