Combined coding and precoding for PAM and QAM HDSL systems
- 1 January 1991
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal on Selected Areas in Communications
- Vol. 9 (6), 861-870
- https://doi.org/10.1109/49.93096
Abstract
A system is described for high-speed digital subscriber line (HDSL) applications. It uses trellis coding combined with Tomlinson (1971) precoding. Theoretical performance results are provided for uncoded pulse amplitude modulation (PAM) and quadrature amplitude modulation (QAM) assuming an ideal decision feedback equalizer (DFE) that includes an optimum feedforward filter. The similarities and differences in behavior are explained. It is shown that combined coding and Tomlinson precoding can achieve the equalization performance of the DFE and full coding gain of the trellis code. Simulation results are given to show that about 3.4 dB additional margin is obtained by using a four-dimensional eight-state trellis code. The receiver complexity is increased by it is quite manageableKeywords
This publication has 25 references indexed in Scilit:
- Convergence and steady-state behavior of a phase-splitting fractionally spaced equalizerIEEE Transactions on Communications, 1990
- Baseband line codes via spectral factorizationIEEE Journal on Selected Areas in Communications, 1989
- Coset codes for partial response channels; or, coset codes with spectral nullsIEEE Transactions on Information Theory, 1989
- Coset codes. I. Introduction and geometrical classificationIEEE Transactions on Information Theory, 1988
- Detection of coded modulation signals on linear, severely distorted channels using decision-feedback noise prediction with interleavingIEEE Transactions on Communications, 1988
- Trellis-coded modulation with redundant signal sets Part I: IntroductionIEEE Communications Magazine, 1987
- Decision feedback equalizationProceedings of the IEEE, 1979
- On the Transmitted Power in Generalized Partial ResponseIEEE Transactions on Communications, 1976
- Optimum Mean-Square Decision Feedback EqualizationBell System Technical Journal, 1973
- New automatic equaliser employing modulo arithmeticElectronics Letters, 1971