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Published September 2000 | Published
Book Section - Chapter Open

Optimizing the capacity of orthogonal and biorthogonal DMT channels

Abstract

The uniform DFT filter bank has been used routinely in discrete multitone modulation (DMT) systems because of implementation efficiency. It has recently been shown that principal component filter banks (PCFB) which are known to be optimal for data compression and denoising applications, are also optimal for a number of criteria in DMT communication. In this paper we show that such filter banks are optimal even when scalar prefilters and postfilters are used around the channel. We show that the theoretically optimum scalar prefilter is the half-whitening solution, well known in data compression theory. We conclude with the observation that the PCFB continues to be optimal for the maximization of theoretical capacity as well.

Additional Information

© 2000 IEEE. Work supported in parts by the ONR grant N00014-99-1-1002, USA, by Microsoft Research, Redmond, WA, and by the NSC 88-2218-E-009-016 and 88-2213-E-002-080, Taiwan, ROC.

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