Abstract
This paper studies the performances of a dual-branch switched-and-stay combining (SSC) diversity receiver, operating over correlated α-µ fading in the presence of cochannel interference (CCI). Very useful, novel, infinite series expressions are obtained for the output signal to interference ratio's (SIR's) probability density function (PDF) and cumulative distribution function (CDF). The performance analysis is based on an outage probability (OP) and an average bit error probability (ASEP) criteria. ASEP is efficiently evaluated for modulation schemes such as noncoherent frequency-shift keying (NCFSK) and binary differentially phase-shift keying (BDPSK). The effects of various parameters, such as input SIR unbalance, the level of correlation between received desired signals and interferences, nonlinearity of the environment, and fading severity on systems performances are graphically presented and analyzed.
Highlights
Various techniques for reducing the fading effects and the influence of the cochannel interference (CCI) are used in wireless communication systems [1]
This paper studies the performances of a dual-branch switched-and-stay combining (SSC) diversity receiver, operating over correlated α-μ fading in the presence of cochannel interference (CCI)
Using the previously derived infinite series expressions, we present representative numerical performance evaluation results of the studied dual-branch SSC diversity receiver, such as average symbol error probability (ASEP) in case of two modulation schemes, noncoherent frequency-shift keying (NCFSK) and 10−1 S1 = S2 = zτ
Summary
Various techniques for reducing the fading effects and the influence of the cochannel interference (CCI) are used in wireless communication systems [1]. With SSC diversity considered in this paper, the receiver selects a particular branch until its signal-to-noise ratio (SNR) drops below a predetermined threshold When this happens, the combiner switches to another branch and stays there regardless of whether the SNR of that branch is above or below the predetermined threshold [1,2,3]. Reference [15] studies the performance of a dual-branch SSC diversity receiver with the switching decision based on SIR, operating over correlated Ricean fading channels in the presence of correlated Nakagami-m distributed CCI. Using infinite series formulae, ASEP is efficiently evaluated for several modulation schemes such as noncoherent frequencyshift keying (NCFSK) and binary differentially phase-shift keying (BDPSK) This analysis has a high level of generality because α-μ fading distribution model includes as special cases other important distributions such as Weibull and Nakagami-m ( the one-sided Gaussian and Rayleigh are special cases of it)
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