Perfect discrete multitone modulation with optimal transceivers.
Journal
IEEE Trans. Signal Processing
Journal Volume
48
Journal Issue
6
Pages
1702-1711
Date Issued
2000
Author(s)
Lin, Yuan-Pei
Abstract
Previously, discrete Fourier transform (DFT)-based discrete multitone modulation (DMT) systems have been widely applied to various applications. In this paper, we study a broader class of DMT systems using more general unitary matrices instead of DFT matrices. For this class, we show how to design optimal DMT systems over frequency-selective channels with colored noise. In addition, asymptotical performance of DFT-based and optimal DMT systems are studied and shown to be equivalent. However, for a moderate number of bands, the optimal DMT system offers significant gain over the DFT-based DMT system, as is demonstrated by examples.
Type
journal article