Optimum ISI-free DMT systems with concave SNR to bit rate relations: when does othonornmality suffice?

Xuejie Song; Soura Dasgupta

doi:10.1109/SPAWC.2007.4401399

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Conference proceeding

Optimum ISI-free DMT systems with concave SNR to bit rate relations: when does othonornmality suffice?

Xuejie Song and Soura Dasgupta

2007 IEEE 8th Workshop on Signal Processing Advances in Wireless Communications, pp.1-4

IEEE Workshop on Signal Processing Advances in Wireless Communications, 8 (Helsinki, Finland, 06/17/2007 - 06/20/2007)

06/2007

DOI: 10.1109/SPAWC.2007.4401399

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Abstract

We consider the design of optimum ISI-free, discrete multi- tone transmission (DMT) systems designed to achieve a quality of service (QoS) requirement quantified by bit rate and symbol error rate (SER) specifications. 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 our earlier papers we considered conditions under which relaxation of an orthonormality requirement produced no improvements, and which produced an attractive modular optimizing solution. The conditions in question were on a function that for a given SER related the bit rate to the SNR required to achieve this SER and involved a convexity requirement not satisfied by power efficient modulation schemes such as FSK, orthogonal and biorthogonal modulation. For these schemes this function is in fact concave. In this paper we show that concavity also suffices for these attractive properties of optimality to hold.

Biorthogonal modulation

Bit rate

Communication channels

Discrete Fourier transforms

Equalizers

Frequency shift keying

Intersymbol interference

OFDM modulation

Quality of service

Transmitters

Details

Title: Subtitle: Optimum ISI-free DMT systems with concave SNR to bit rate relations: when does othonornmality suffice?
Creators: Xuejie Song - University of Iowa
Soura Dasgupta - University of Iowa
Resource Type: Conference proceeding
Publication Details: 2007 IEEE 8th Workshop on Signal Processing Advances in Wireless Communications, pp.1-4
Conference: IEEE Workshop on Signal Processing Advances in Wireless Communications, 8 (Helsinki, Finland, 06/17/2007 - 06/20/2007)
Publisher: IEEE
DOI: 10.1109/SPAWC.2007.4401399
ISSN: 1948-3244
eISSN: 1948-3252
Language: English
Date published: 06/2007
Academic Unit: Electrical and Computer Engineering
Record Identifier: 9984197918802771

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