Performance analysis of multibranch dual-hop nonregenerative relay systems with EGC in Nakagami-m channels

Authors:
H. Q. Huynh;S. I. Husain;J. Yuan;A. Razi;H. Suzuki
Affiliations:
School of Electrical Engineering and Telecommunications, The University of New South Wales, Sydney, NSW, Australia;School of Electrical Engineering and Telecommunications, The University of New South Wales, Sydney, NSW, Australia;School of Electrical Engineering and Telecommunications, The University of New South Wales, Sydney, NSW, Australia;School of Electrical Engineering and Telecommunications, The University of New South Wales, Sydney, NSW, Australia;Wireless Technologies Laboratory, CSIRO ICT Centre, Marsfield, NSW, Australia
Venue:
EURASIP Journal on Wireless Communications and Networking
Year:
2010

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Abstract

The end-to-end performance of multibranch dual-hop wireless communication systems with nonregenerative relays and equal gain combiner (EGC) at the destination over independent Nakagami-m fading channels is studied. We present new closed form expressions for probability distribution function (PDF) and cumulative distribution function (CDF) of end-to-end signal to noise ratio (SNR) per branch in terms of Meijer's G function. From these results, analytical formulae for the moments of the output SNR, the average overall SNR, the amount of fading, and the spectral efficiency are also obtained in closed form. Instead of using moments-based approach to analyze the asymptotic error performance of the system, we employ the characteristic function (CHF) method to calculate the average bit error probability (ABEP) and the outage probability for several coherent and noncoherent modulation schemes. The accuracy of the analytical formulae is verified by various numerical results and simulations.