NDLI: Optimal SNR-based selection relaying scheme with M-PSK modulation in cooperative wireless systems

Content Provider	IEEE Xplore Digital Library
Author	Bastami, A.H. Olfat, A.
Copyright Year	2009
Description	Author affiliation: Department of Electrical and Computer Engineering, University of Tehran, Tehran, Iran (Bastami, A.H.; Olfat, A.)
Abstract	Error propagation from the relay to the destination is a major drawback of digital relaying protocols that substantially diminishes the cooperative diversity gain of the system. Appropriately designed selection relaying schemes can effectively mitigate this phenomenon and improve the diversity order, specifically when the source-relay channel state information (CSI) is not available at the destination. In this paper, we investigate the SNR-based selection relaying scheme and present a closed-form expression for the end-to-end symbol error probability (SEP) of the system for M-PSK modulation. The optimal threshold which minimizes the end-to-end SEP and provides full diversity order is also presented in closed-form. In our analysis, we examine the error propagation scenario in detail and derive a closed-form expression for the SEP under this scenario. Numerical results demonstrate that the SNR-based selection relaying scheme by employing the optimal threshold, without using error detection codes that reduce the bandwidth efficiency, effectively mitigates the error propagation and significantly improves the diversity order.
Starting Page	1
Ending Page	6
File Size	303261
Page Count	6
File Format	PDF
ISBN	9781424446568
DOI	10.1109/ICICS.2009.5397697
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-12-08
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Detectors Diversity reception Digital relays Channel state information Closed-form solution Error probability Maximum likelihood decoding Protocols Digital modulation Electronic mail SNR-based selection relaying cooperative diversity decode-and-forward (DF) error propagation M-PSK
Content Type	Text
Resource Type	Article

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