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Maximal ratio combining performance analysis in practical Rayleigh fading channels

Summary: Maximal ratio combining performance analysis in
practical Rayleigh fading channels
D.B. Smith and T.D. Abhayapala
Abstract: The authors present a novel theoretical method to analyse the maximal ratio combining
(MRC) receivers using BPSK and M-PSK modulation in spatially correlated Rayleigh fading
channels, with perfect and imperfect channel knowledge, in terms of antenna array configuration
and parameters of scatterer distributions. In this analysis closed form expressions for error
probabilities of these modulations with MRC are derived, allowing for non-distinct eigenvalues
from the channel gain correlation matrix. The results of performance analysis assuming different
receiver configurations and scattering scenarios presented give valuable insight into the
performance of MRC in practical Rayleigh fading scenarios for isotropic and non-isotropic
scatterer distributions.
1 Introduction
Maximal ratio combining represents a theoretically optimal
combiner over fading channels as a diversity scheme in a
communication system. Theoretically, multiple copies of the
same information signal are combined so as to maximise the
instantaneous SNR at the output [1]. However, system
designs often assume that the fading is independent across
multiple diversity channels. Physical constraints often


Source: Abhayapala, Thushara D. - Department of Information Engineering, Australian National University


Collections: Computer Technologies and Information Sciences