Exact error probabilities for MRC in frequency selective Nakagami fading with ISI, CCI and ACI

Authors:
M. A. Rahman;C. S. Sum;S. Sasaki;T. Baykas;J. Wang;R. Funada;H. Harada;S. Kato
Affiliations:
National Institute of Information and Communications Technology, Yokosuka, Japan;National Institute of Information and Communications Technology, Yokosuka, Japan;Department of Electrical and Electronic Engineering, Niigata University, Niigata, Japan;National Institute of Information and Communications Technology, Yokosuka, Japan;National Institute of Information and Communications Technology, Yokosuka, Japan;National Institute of Information and Communications Technology, Yokosuka, Japan;National Institute of Information and Communications Technology, Yokosuka, Japan;National Institute of Information and Communications Technology, Yokosuka, Japan
Venue:
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Year:
2009

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Abstract

An exact expression of error rate is developed for maximal ratio combining (MRC) in an independent but not necessarily identically distributed frequency selective Nakagami fading channel taking into account inter-symbol, co-channel and adjacent channel interferences (ISI, CCI and ACI respectively). The characteristic function (CF) method is adopted. While accurate analysis of MRC performance cannot be seen in frequency selective channel taking ISI (and CCI) into account, such analysis for ACI has not been addressed yet. The general analysis presented in this paper solves a problem of past and present interest, which has so far been studied either approximately or in simulations. The exact method presented also lets us obtain an approximate error rate expression based on Gaussian approximation (GA) of the interferences. It is shown, especially while the channel is lightly faded, has fewer multipath components and a decaying delay profile, the GA may be substantially inaccurate at high signal-to-noise ratio.