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Performance Analysis for Selection Decode-and-Forward Relay Networks with Differential Modulation over Rayleigh Fading Channels  

Kong, Hyung-Yun (울산대학교 전기전자 정보시스템 공학부 무선통신 연구실)
Bao, Vo Nguyen Quoc (울산대학교 전기전자 정보시스템 공학부 무선통신 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.35, no.1A, 2010 , pp. 1-9 More about this Journal
Abstract
This paper offers performance analysis of selection decode and forward (DF) networks with differential modulation/demodulation for an arbitrary number of relays in independent but not identically distributed Rayleigh fading channels. We have shown that the selection DF protocol with differential modulation can achieve full diversity in both independent identically distributed (i.i.d.) and independent but not identically distributed (i.n.d.) Rayleigh fading channels, and the performance loss due to using non-coherent detection is not substantial. Furthermore, we study the impact of combining techniques on the performance of the system by comparing a system that uses selection combining (SC) to one that uses maximum ratio combining (MRC). Simulations are performed and show that they match exactly with analytic ones in high SNR regime.
Keywords
Cooperative Communication; Differential Modulation; Decode-and-forward; Maximal Ratio Combining(MRC); Selection Combining(SC);
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