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Decoder malfunction in BCH decoders

机译:BCH解码器中的解码器故障

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摘要

A t-error-correcting bounded-distance decoder either produces the codeword nearest the received vector (if there is a codeword at distance no more than t) or indicates that no such codeword exists. However, BCH decoders based on the Peterson-Gorenstein-Zierler algorithm or the Euclidean algorithm can malfunction and produce output vectors that are not codewords at all. For any integer i no greater than t/2, if the received vector is at distance at most t-2i from a codeword belonging to a (t-i)-error-correcting BCH supercode, then the BCH decoder output is that codeword from the supercode.
机译:T纠错有界距离解码器要么生成最接近接收向量的代码字(如果距离不超过t的代码字),要么表明不存在这样的代码字。但是,基于Peterson-Gorenstein-Zierler算法或Euclidean算法的BCH解码器可能会发生故障,并产生根本不是码字的输出矢量。对于不大于t / 2的任何整数i,如果接收到的矢量与属于(ti)纠错BCH超码的码字相距最多t-2i,则BCH解码器输出是来自超码的码字。

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