Maximum likelihood decoder

Details Maximum likelihood decoder Maximum likelihood decoder

1987-04-16

1989-04-18

Atkinson, Charles E.

Excavating

G06F 1110

Patent

active

048233463

ABSTRACT:
A maximum likelihood decoder for decoding a code from a signal transmitted through quadrature amplitude modulation of a code including a convolutional code can decode at high speed and high accuracy with a simple hardware configuration. In the maximum likelihood decoding of the convolutional code, the metric processing is not carried out for all of the possible paths and states but a smaller number of path(s) (metric(s)) and state(s) (metric(s)) are selected in a descending order to determine survival paths.

REFERENCES:
patent: 4520490 (1985-05-01), Wei
patent: 4586182 (1986-04-01), Gallager
patent: 4660214 (1987-04-01), Pahlavan et al.
patent: 4700349 (1987-10-01), Gallager
patent: 4713817 (1987-12-01), Wei
Wei, Rotationally Invariant Convolutional Channel Coding with Expanded Signal Space-Part II: Nonlinear Codes, IEEE Journal of Selected Areas in Comm., vol. SAC-2, No. 5, Sep. 1984, pp. 672-686.

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