Performance analysis of dual-hop fixed-gain AF relaying systems with OSTBC over Nakagami-m fading channels |
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Authors: | ?brahim Altunba? Ahmet Y?lmaz ?erife Seda Kucur O?uz Kucur |
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Institution: | 1. Electronics and Communications Engineering Department, ?stanbul Technical University, 34469 Maslak-?stanbul, Turkey;2. Electronics Engineering Department, Gebze Institute of Technology, 41400 Gebze-Kocaeli, Turkey;3. School of Computer and Communication Sciences, EPFL CH 1015, Lausanne, Switzerland |
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Abstract: | In this paper, we present outage probability and symbol error rate (SER) performance analyses of a dual-hop transmission using fixed-gain amplify-and-forward relaying in flat Nakagami-m fading channels. The system under consideration is equipped with multiple antennas at source and destination adopting orthogonal space-time block coding to provide transmit diversity and maximum ratio combining to provide receive diversity, respectively. For integer and half-integer m values, closed forms of exact outage probability and moment generating function (MGF) expressions are derived through cumulative distribution function (CDF) of the overall system signal-to-noise ratio. Closed-form exact SER expressions based on the overall CDF are obtained for binary phase shift keying, binary frequency shift keying and M-ary pulse amplitude modulation. Exact SER expressions based on the MGF method are also obtained for binary differential phase shift keying, M-ary phase shift keying and M-ary quadrature amplitude modulation. Moreover, the asymptotic diversity order analysis is performed through derivations of asymptotic outage probability and SER. Theoretical analyses are validated by Monte Carlo simulations showing perfect match between each other. |
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Keywords: | Dual-hop relaying Space-time block code (STBC) Nakagami-m fading Fixed gain Diversity order |
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