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Error Performance Evaluation of Wireless Communication Systems Using Maximal Ratio Combining with Multiple Interferers

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Abstract

In this paper we evaluate the error performance of wireless communication systems using M-branch maximal ratio combining (MRC) with multiple cochannel interference. Three cochannel interference models are considered: (A) L independent identically distributed (i.i.d.) Nakagami-m cochannel interferers; (B) L independent cochannel interferers consisting of L-N Nakagami-m interferers and N Rayleigh interferers; (C) L independent cochannel interferers in which each interferer follows Nakagami-m distribution for a fraction of time and Rayleigh distribution for the remaining time. In addition, the desired signal assumes Nakagami-m fading. This paper considers that an exponential correlation model is assumed for the desired signals received on each branch, while the interferers are assumed independent. Closed-form expressions are derived for the probability density functions (PDFs) of the instantaneous signal-to-interference power ratio (SIR) at the output of the MRC for the three interference models. Using these SIR PDFs, further closed-form expressions to evaluate the outage probability (OTP) and the average bit error probability (BEP) of differential phase-shift keying (DPSK) are derived. Numerical results showing the impacts of the system parameters on the OTP and the average BEP are then presented.

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Authors and Affiliations

  1. Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, China

    C. M. Lo & W. H. Lam

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  1. C. M. Lo
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  2. W. H. Lam
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Lo, C.M., Lam, W.H. Error Performance Evaluation of Wireless Communication Systems Using Maximal Ratio Combining with Multiple Interferers. International Journal of Wireless Information Networks 8, 229–238 (2001). https://doi.org/10.1023/A:1017929704895

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