Decoder employing viterbi decoding method for decoding coded mul

Details Decoder employing viterbi decoding method for decoding coded mul Decoder employing viterbi decoding method for decoding coded mul

1995-06-21

1997-11-11

Marcelo, Melvin

Multiplex communications

Generalized orthogonal or special mathematical techniques

Quadrature carriers

375262, 375341, H04L 100, H04L 2734, H03M 1300

Patent

active

056871643

ABSTRACT:
A Viterbi decoder decodes a received signal having Ich and Qch components obtained by modulating a convolutional coded multi-valued QAM signal. The Viterbi decoder includes a first unit which inputs the received signal having the Ich and Qch components, a second unit which finds Euclidean distance between a predetermined signal point, which is one of a plurality of predetermined signal points allocated on a plane formed of Ich and Qch axes orthogonally crossed, and a signal point of the received signal, and a third unit which performs a Viterbi decoding based on the Euclidean distance obtained by the second unit.

REFERENCES:
patent: 4534040 (1985-08-01), Thapar
patent: 4709377 (1987-11-01), Martinez et al.
patent: 4873701 (1989-10-01), Tretter
patent: 5134635 (1992-07-01), Hong et al.
patent: 5233629 (1993-08-01), Paik et al.
patent: 5502736 (1996-03-01), Todoroki

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