Multi-channel trellis encoder/decoder

Pulse or digital communications – Repeaters – Testing

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371 43, H04L 2726

Patent

active

049808974

ABSTRACT:
A multi-channel trellis encoder/decoder is disclosed for use with multi-channel data transmission systems. For each data transmission symbol interval, trellis encoding is applied across all available channels, and for each data reception symbol interval trellis decoding is applied across all available channels. In comparision with systems employing independent trellis encoding along each available channel, the present invention reduces data throughput delays by roughly an order of magnitude, and reduces implementation complexity by roughly a factor equal to the number of transmission channels. Further, the multi-channel trellis encoder will permit different data transmission rates as well as permitting variations in signal power and/or noise power from channel to channel.

REFERENCES:
patent: 4328582 (1982-05-01), Battail et al.
patent: 4483012 (1984-11-01), Wei
patent: 4520490 (1985-05-01), Wei
patent: 4545054 (1985-10-01), Davis
patent: 4641327 (1987-02-01), Wei
patent: 4713817 (1987-12-01), Wei
Abstract-A Frequency Domain Approach To Combined Spectral Shaping And Coding, Antonio Ruiz and John M. Cioffi, ICC, Jun. 1987, pp. 1711-1715.
IEE International Conference-19.2 KBPS Voiceband Data Modem Based on Orthongoally Multiplexed QAM Techniques, Hirosaki, B., Yoshida, A., Tanaka, O., Hasegawa, S., Inoue, K., and Watanabe, K., IEEE Communications Society, Jun. 23-26, 1985, pp. 661-665.
Proakis; "Digital Communications"; 1983; p. 295.
G. Ungerboeck, "Channel Coding with Multilevel/Phase Signals", Jan. 1982, Transactions on Information Theory, vol. IT-28, No. 1, pp. 55-67.
G. David Forney, Jr. et al, "Efficient Modulation for Band-Limited Channels", Sep. 1984, IEEE Journal on Selected Areas in Communications, vol. SAC-2, No. 5, pp. 632-647.
Lee-Fang Wei, "Rotationally Invariant Convolutional Channel Coding with Expanded Signal Space--Part 1: 180.degree.", Sep. 1984, IEEE Journal on Selected Areas in Communications, vol. SAC-2, No. 5, pp. 659-671.
Lee-Fang Wei, "Rotationally Invariant Convolutional Channel Coding with Expanded Signal Space--Part II: Nonlinear Codes", Sep. 1984, IEEE Journal on Selected Areas in Communications, vol. SAC-2, No. 5, pp. 672-686.

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