FIELD: information technology.
SUBSTANCE: invention relates to telecommunication systems and broadcast video broadcasting information systems and can find application in decoders of discrete information receiving devices. Method for decoding the LDPC codes is that for received signal codeword, signal-to-noise ratio is determined, then switching to optimal decoding algorithm for given value of signal-to-noise ratio, after decoding codeword, decoded signal is recorded to common array of decoded signal. "Trust spread" algorithm for signal-to-noise ratio values is less than 1.25 dB, "minimum-sum" approximation algorithm for signal-to-noise values in range [1.25, 1.8] dB, "minimum-sum" algorithm for signal-to-noise values in range [1.8, 4.95] dB, "a posteriori probabilities" algorithm with signal-to-noise ratio in range [4.95, 11.5] dB, algorithm with bit inversion – for signal-to-noise ratio values greater than 11.5 dB.
EFFECT: decrease in average computational complexity of decoding with preservation decoding quality of received signal.
3 cl, 1 dwg
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