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Maximum likelihood soft decoding of binary codes by projecting on Abelian group codes

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2 Author(s)
Ran, M. ; Dept. of Electr. Eng.-Syst., Tel Aviv Univ., Israel ; Snyders, J.

An approach to fast maximum likelihood decoding of some binary codes is presented. The binary codewords are regarded as images of some C/sub g/ group code, called the projected code, defined over an Abelian group A. The neighbourhood of z, z/spl isin/A/sup N/, the vector of symbol-by-symbol soft decoding, is examined to identify the most likely codeword of C/sub g/. A small list of candidate codewords is prepared by employing certain elimination rules. A substantial reduction of computational complexity is achieved by this method.

Published in:

Electrical and Electronics Engineers in Israel, 1995., Eighteenth Convention of

Date of Conference:

7-8 March 1995