Method and apparatus for resolving phase ambiguities in trellis

Details Method and apparatus for resolving phase ambiguities in trellis Method and apparatus for resolving phase ambiguities in trellis

1991-05-03

1993-08-03

Chin, Stephen

Pulse or digital communications

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Testing

375 86, 371 43, H04L 2720

Patent

active

052336301

ABSTRACT:
A codec for resolving transmission phase ambiguities in the M-ary PSK modulation of trellis coded data. A trellis encoder uses a differential encoder and a convolutional encoder, along with multiplexed differential encoders, to generate from sets of input data bits corresponding phase point values for use in M-ary PSK carrier modulation. A trellis decoder uses a Viterbi decoder and a differential decoder, along with multiplexed differential decoders, to produce estimates of the original input data bits from the received signal sector value.

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patent: 4993046 (1991-02-01), Saito et al.
patent: 5115453 (1992-05-01), Calderbank et al.
"Practical Applications of TCM", Houtan Dehesh et al., 1990 IEEE Military Communications Conference, Sep. 30-Oct. 3, 1990, pp. 15.3.1-15.3.4
"Trellis-Coded MPSK Modulation for Highly Efficient Military Satellite Applications" by Andrew J. Viterbi et al., 1988 Military Communications Conference, Oct. 23-26, 1988, pp. 35.2.1-35.2.5.
"A Pragmatic Approach to Trellis-Coded Modulation" by Andrew J. Viterbi et al., Jul. 1989-IEEE Communications Magazine, pp. 11-19.
"A 25 MHz Viterbi FEC Code" by Richard Kerr et al. 1990 IEEE Custom Integrated Circuit Conference Proceedings, May 13-16, 1990, pp. 13.6.1-13.6.5.

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