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Soft trellis-based decoder for linear block codes

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2 Author(s)
Berger, Y. ; Dept. of Electr. Eng., Tel Aviv Univ., Israel ; Be'ery, Y.

A systematic design of a trellis-based maximum-likelihood soft-decision decoder for linear block codes is presented. The essence of the decoder is to apply an efficient search algorithm for the error pattern on a reduced trellis representation of a certain coset. Rather than other efficient decoding algorithms, the proposed decoder is systematically designed for long codes, as well as for short codes. Computational gain of up to 6 is achieved for long high-rate codes over the well-known trellis decoder of Wolf (1978). Efficient decoders are also obtained for short and moderate length codes

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Information Theory, IEEE Transactions on  (Volume:40 ,  Issue: 3 )