Optimum ISI-free DMT systems with arbitrary data rates and PSK modulation: when does orthonornmality suffice?

Authors:
Xuejie Song;Soura Dasgupta
Affiliations:
The University of Iowa, Iowa City;The University of Iowa, Iowa City
Venue:
AsiaCSN '07 Proceedings of the Fourth IASTED Asian Conference on Communication Systems and Networks
Year:
2007

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Abstract

We consider the design of optimum ISI-free, discrete multitone transmission (DMT) systems designed to achieve a quality of service (QoS) requirement quantified by bit rate and symbol error rate specifications. The optimality is in the sense of minimizing the transmitted power given the QoS specifications subject to the knowledge of the channel and colored interference at the receiver input of the DMT system. In an earlier paper we had provided conditions on the underlying modulation schemes under which orthonormal transforms suffice for optimality, and the solution has an attractive modularity. In this paper we demonstrate that PSK satisfies these conditions.