Soft decision digital communication method and apparatus

Details Soft decision digital communication method and apparatus Soft decision digital communication method and apparatus

1994-11-01

1998-01-06

Chin, Stephen

Pulse or digital communications

Receivers

Angle modulation

375341, 371 43, H03D 322, H04L 2422

Patent

active

057063133

ABSTRACT:
A decoding apparatus (200) decodes a coherent, differentially encoded multi-level phase shift keying (DEPSK) modulated signal. A coherent receiver (101) receives and, subsequently, outputs the coherent DEPSK modulated signal to a metric computer (201). The metric computer (201) generates a soft decision metric .LAMBDA.(s(n)) corresponding to the coherent DEPSK modulated signal which is outputted to a forward error correction (FEC) decoder (107). The FEC decoder (107) decodes the coherent DEPSK modulated signal in accordance with the soft derision metric .LAMBDA.(s(n)) corresponding to the coherent DEPSK modulated signal.

REFERENCES:
patent: 4742533 (1988-05-01), Weidner et al.
patent: 5134635 (1992-07-01), Hong et al.
patent: 5204874 (1993-04-01), Falconer et al.
patent: 5214675 (1993-05-01), Mueller et al.
patent: 5379324 (1995-01-01), Mueller et al.

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