Frame synchronization in trellis-coded communication systems

Details Frame synchronization in trellis-coded communication systems Frame synchronization in trellis-coded communication systems

1985-07-09

1987-02-03

Griffin, Robert L.

Pulse or digital communications

Spread spectrum

Direct sequence

371 43, 375 38, H04L 704, G06F 1110

Patent

active

046413278

ABSTRACT:
Frame synchronization is accomplished in a trellis-coded communication system by causing the sequence of signal points that results when the receiver incorrectly determines the start of each frame to be an impermissible sequence, and detecting the existence of the impermissible sequence by monitoring the rate of occurrence of non-zero difference between the minimum branch metric and the minimum path metric of a maximum likelihood decoding algorithm, such as the Viterbi decoding algorithm. In another aspect, an interleaver and a deinterleaver are used to assure that impermissible sequences result when frame synchronization is lost.

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Falconer, "Jointly Adaptive Equalization and Carrier Recovery in Two-Dimensional Digital Communication Systems," Bell System Technical Journal, pp. 317-334, Mar. 1976.
Viterbi and Omura, Principles of Digital Communication and Coding, pp. 258-261, 1979.

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