Non-binary viterbi decoder using butterfly operations

Pulse or digital communications – Receivers – Particular pulse demodulator or detector

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714795, 714796, H04L 100

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active

061154369

ABSTRACT:
A decoder for decoding a data signal using a non-binary trellis diagram by designating binary butterfly trellises within the non-binary trellis is disclosed. The decoder analyzes each designated binary butterfly trellis using the basic Viterbi binary butterfly operation to generate a pair of pathways to each node of the non-binary trellis. The pathways for each node from the basic binary butterfly operations are compared to determine the survivor path for that node.

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W. E. Ryan and S. G. Wilson, "Two Classes of Convolutional Codes Over GF(q) for q-ary Orthogonal Signaling," IEEE Transactions on Communications, vol. 39, No. 1, Jan. 1991, pp. 30-40, XP-000220444.

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