Error Performance Improvement Of A Multiplexed Mimo Systems Over Weibull Gamma Fading Channel Essay
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Error Performance improvement in Spatially Multiplexed MIMO Systems over Weibull-Gamma Fading Channel
Keerti Tiwari and Davinder S. Saini
Department of Electronics and Communication Engineering
Jaypee University of Information Technology
Waknaghat, Solan, (H.P.) - 173234, India
E-mail- keerti.tiwari@mail.juit.ac.in, davinder.saini@juit.ac.in
Abstract- In multiple-input multiple-output (MIMO) systems, spatial demultiplexing at the receiver is a motivational task. Thus, several detection techniques are investigated in existing literature. There is a tradeoff between computational complexity and optimal performance in many detection techniques. The ordered successive interference cancellation (OSIC) with minimum mean square error (MMSE) is used to improve the error performance. However, maximum likelihood (ML) detection gives optimal performance at the higher complexity level whereas MMSE-OSIC detection is less complex. Therefore, MMSE-OSIC2 detection is suggested as a solution. In this paper, spatial multiplexed (SM) MIMO systems are considered to evaluate error performance with different detection techniques such as MMSE-OSIC, ML and MMSE-OSIC2 in a composite fading i.e. Weibull-gamma (WG) fading environment. In WG distribution, Weibull and gamma distribution represent multipath and shadowing effects respectively. It is shown by simulation results that the MMSE-OSIC2 detection technique gives the improved symbol error performance (SER) which is closely likely ML performance