Combined Trellis Coding and DFE through Tomlinson Precoding

The authors propose and evaluate a receiver architecture which combines the power of a decision feedback equalizer (DFE) with trellis coding, while allowing for minimal decoding delay in such a way that the total gain of the system is additive. The system is based on a structure that transposes the feedback filter of the DFE into the transmitter and, for high-order constellations, provides negligible increase in transmitter power. The first known hardware realization of a high bit rate digital subscriber line (HDSL) system that achieves the coding gain provided by a trellis code in addition to the equalization gain provided by the DFE is presented. A system whose complexity of implementation is comparable to that of a typical DFE and an independent Viterbi decoder is proposed. >

[1]  M. Vedat Eyuboglu,et al.  Detection of coded modulation signals on linear, severely distorted channels using decision-feedback noise prediction with interleaving , 1988, IEEE Trans. Commun..

[2]  J.-J. Werner,et al.  The HDSL environment (high bit rate digital subscriber line) , 1991 .

[3]  A. Robert Calderbank,et al.  Baseband line codes via spectral factorization , 1989, IEEE J. Sel. Areas Commun..

[4]  J. E. Mazo,et al.  On the Transmitted Power in Generalized Partial Response , 1976, IEEE Trans. Commun..

[5]  I. Kalet,et al.  Optimized decision feedback equalization versus optimized orthogonal frequency division multiplexing, for high-speed data transmission over the local cable network , 1989, IEEE International Conference on Communications, World Prosperity Through Communications,.

[6]  A. Robert Calderbank,et al.  Coset codes for partial response channels; or, coset codes with spectral nulls , 1989, IEEE Trans. Inf. Theory.

[7]  Shahid U. H. Qureshi,et al.  Reduced-state sequence estimation for coded modulation of intersymbol interference channels , 1989, IEEE J. Sel. Areas Commun..

[8]  H. Miyakawa,et al.  Matched-Transmission Technique for Channels With Intersymbol Interference , 1972, IEEE Trans. Commun..

[9]  G. David Forney,et al.  Trellis precoding: Combined coding, precoding and shaping for intersymbol interference channels , 1992, IEEE Trans. Inf. Theory.

[10]  C.A. Belfiore,et al.  Decision feedback equalization , 1979, Proceedings of the IEEE.

[11]  M. Tomlinson.  New automatic equaliser employing modulo arithmetic , 1971 .

[12]  Lee-Fang Wei.  Rotationally Invariant Convolutional Channel Coding with Expanded Signal Space-Part II: Nonlinear Codes , 1984, IEEE J. Sel. Areas Commun..

[13]  N. A. Zervos,et al.  High-speed carrierless passband transmission over the local cable network , 1990, [Proceedings] GLOBECOM '90: IEEE Global Telecommunications Conference and Exhibition.