9.4. DecodingThere are two decoding schemes used to achieve a reasonable balance between the complexity and the probability of decoding error. The first is particularly simple but is applicable only to the BSC at rates far below the channel capacity. The second scheme, which decodes directly from the a posteriori probabilities at the channel output, assumes that the code words from an (n, p, q) code are used with equal probability on an arbitrary binary-input channel
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