Modulation diversity for frequency-selective fading channels

TitleModulation diversity for frequency-selective fading channels
Publication TypeJournal Article
Year of Publication2003
AuthorsSchober, R., L. Lampe, W. H. Gerstacker, and S. Pasupathy
JournalInformation Theory, IEEE Transactions on
Volume49
Pagination2268 - 2276
Date Publishedsep.
ISSN0018-9448
KeywordsBER, bit-error rates, cochannel interference, cochannel interference suppression, computationally costly optimum receiver, COST fading models, decision feedback equalisers, decision-feedback equalization, delays, design criterion, design rule, DFE, diversity reception, efficient low-complexity linear equalization, error statistics, flat fading, frequency-selective fading channels, interference suppression, MD codes, modulation, modulation diversity, pairwise error probability, power-delay profile, Rayleigh channels, Rayleigh-fading channels, simulations, single-symbol transmission, upper bound
Abstract

In this article, modulation diversity (MD) for frequency-selective fading channels is proposed. The achievable performance with MD is analyzed and a simple design criterion for MD codes for Rayleigh-fading channels is deduced from an upper bound on the pairwise error probability (PEP) for single-symbol transmission. This design rule is similar to the well-known design rule for MD codes for flat fading and does not depend on the power-delay profile of the fading channel. Several examples for MD codes with prescribed properties are given and compared. Besides the computationally costly optimum receiver, efficient low-complexity linear equalization (LE) and decision-feedback equalization (DFE) schemes for MD codes are also introduced. Simulations for the widely accepted COST fading models show that performance gains of several decibels can be achieved by MD combined with LE or DFE at bit-error rates (BERs) of practical interest. In addition, MD also enables the suppression of cochannel interference.

URLhttp://dx.doi.org/10.1109/TIT.2003.815786
DOI10.1109/TIT.2003.815786

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