Method and apparatus for re-encoding decoded data

Details Method and apparatus for re-encoding decoded data Method and apparatus for re-encoding decoded data

1997-08-04

2000-06-13

Chin, Stephen

Pulse or digital communications

Receivers

375262, 375265, 375341, H03K 900

Patent

active

060758244

ABSTRACT:
A re-encoded history data bits generator (101), in a communication system having a block of convolutionally encoded data bits that are interleaved into a matrix (200), selects, for each of the required number of re-encoded history data bits, a combination of data bits from a sequence of previously decoded data bits (410). The position of data bits in each combination is predetermined relative to the position of a data bit last shifted into in the sequence (410). The re-encoder encodes the combinations of the selected data bits thereby producing the re-encoded history data bits. The data bits of each combination are at consecutive positions in the sequence (410). The data bits of an encoded word constitute each row of the matrix (200).

REFERENCES:
patent: 5134635 (1992-07-01), Hong et al.
patent: 5442627 (1995-08-01), Viterbi et al.
patent: 5862190 (1999-01-01), Schaffner

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