Convolution decoder using the Viterbi algorithm

Details Convolution decoder using the Viterbi algorithm Convolution decoder using the Viterbi algorithm

1996-08-23

1998-09-01

Pham, Chi H.

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

370358, 370353, 371 434, H03D 100, H04L 1250, H04L 1266, G06F 1110

Patent

active

058021159

ABSTRACT:
A convolution decoder includes, for each state S of a shift register receiving an initial signal, an add-compare-select circuit which provides a one-bit decision for selecting either one of states 2S or 2S+1 as a state preceding the current state S. A decoding element traces back the memory according to a path indicated by the decisions stored in the memory in order to restore the succession of states of the initial signal. Each calculation cell associated with a state S further includes means for establishing a complex R-bit decision comprising, by decreasing weight, the one-bit decision of the calculation cell and the R-1 most significant bits of the complex decision established by the cell associated with the selected state 2S or 2S+1.

REFERENCES:
patent: 4905317 (1990-02-01), Suzuki et al.
patent: 5530707 (1996-06-01), Lin

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