Method and apparatus for decoding convolutionally encoded inform

Details Method and apparatus for decoding convolutionally encoded inform Method and apparatus for decoding convolutionally encoded inform

1995-09-01

1997-11-04

Baker, Stephen M.

Excavating

H03M 1312

Patent

active

056848110

ABSTRACT:
An apparatus (800) processes a data stream of convolutionally encoded information and generates decoded information using a series of symbol selections that potentially correspond to at least a portion of the data stream (610, 620). A first reliability indication is obtained for a particular decision made for a symbol selection (630). When the reliability indicator does not satisfy a particular criteria, a traceback is performed along the series of symbol selections to develop a second reliability indication based on whether, after adjusting for allowable error patterns, an alternative set of symbol selections yields the decoded information within a predetermined number of symbol selections (635, 640, 645, 650, 655, 660, 665). An action is taken based on the second reliability indication (670).

REFERENCES:
patent: 5208816 (1993-05-01), Seshardi et al.
patent: 5229767 (1993-07-01), Winter et al.
patent: 5406570 (1995-04-01), Berrou et al.
patent: 5537444 (1996-07-01), Nill et al.
patent: 5537445 (1996-07-01), Blaker et al.
patent: 5586128 (1996-12-01), Chen
patent: 5588028 (1996-12-01), Parizhsky

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