Method and apparatus for decoding block codes

Details Method and apparatus for decoding block codes Method and apparatus for decoding block codes

1996-10-08

1998-09-15

Baker, Stephen M.

Excavating

H03M 1300

Patent

active

058090436

ABSTRACT:
A decoding system processes a received vector r to produce a soft symbol information vector output s including a reliability value for each received code symbol. From the reliability values, clusters of symbols within the received vector r having low reliability are identified and detected. Responsive thereto, the received vector r is permuted to scatter the low reliability symbols within each detected low reliability cluster throughout a given codeword. A decoding generator matrix G is also correspondingly permuted is response to the detection of low reliability clusters of symbols. Utilizing a trellis obtained from the permuted decoding generator matrix G', the permuted received vector r' is then sequentially or otherwise suboptimally decoded.

REFERENCES:
patent: 4821268 (1989-04-01), Berlekamp
patent: 4835772 (1989-05-01), Peile et al.
patent: 5457704 (1995-10-01), Hoeher et al.

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