| 摘要 |
This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract. A method and structure of processing soft information in a block code decoder, includes a soft-input soft-output decoder ( 910 ) receiving a length n soft input vector, creating a binary vector Y corresponding to the length n soft input vector, hard decoding each linear function X<SUB>i </SUB>of Y and a test pattern Z<SUB>i </SUB>of one or more test patterns, wherein if the hard decoding is successful a codeword produced by the hard decoding of the linear function X<SUB>i </SUB>is added to a set S, removing redundant codewords in S to form a reduced set S' ( 520 ), and an extrinsic value estimator ( 1140 ) generating n soft outputs based on c estimated soft output values and (n-c) non-estimated soft output values ( 530 ) wherein the c estimated soft output values are computed from one or more positions of the length n soft input vector and one or more codewords in the set S'.
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