Performance analysis of dual switched diversity over correlated Weibull fading channels with co-channel interference

摘要

This paper studies the performance of switch and stay combining (SSC) diversity in the presence of co-channel interference over correlated Weibull fading channels. SSC diversity based on signal-to-interference ratio (SIR) is a low-complexity and a very efficient technique that reduces fading and co-channel interference influence. New closed-form expressions for the probability density function and cumulative distribution function of the output SIR's are derived. These formulas are used in a detailed analysis of the average output SIR and outage probability. The influence of fading severity and correlation coefficient on the optimum switching threshold and system performance is investigated. Monte Carlo simulations are performed to verify obtained theoretical results and determine average bit error rate in detecting binary phase-shift keying (BPSK), differential BPSK and quadrature amplitude modulation signals. Copyright © 2011 John Wiley & Sons, Ltd.