NDLI: Opportunistic cooperation and optimal power allocation for wireless sensor networks

Content Provider	IEEE Xplore Digital Library
Author	Runping Yuan Taiyi Zhang Jianxiong Huang Li Sun
Copyright Year	1975
Abstract	Cooperative communications is a promising technology to improve the performance of wireless sensor networks. In this paper, a dual-hop wireless cooperative network with opportunistic amplify-and-forward relaying is investigated over independent and non-identically distributed Nakagami-m fading channels. Due to the complicated form of the probability density function of the instantaneous signal-to-noise ratio (SNR), the symbol error rate and outage probability expressions are difficult to obtain in closed form. Taking advantage of Maclaurin series expansion of the probability density function of the output instantaneous SNR, we present the asymptotic symbol error rate and outage probability expressions at medium and high SNR regions, and the optimal power allocation scheme between the source and opportunistic relay is also proposed to minimize the outage probability. Simulation results demonstrate that the derived symbol error rate and outage probability matches well with the Monte-Carlo simulations. In addition, it is verified that the optimal power allocation scheme outperforms the equal power allocation scheme in terms of outage probability.
Sponsorship	IEEE Consumer Electronics Society
File Size	157012
File Format	PDF
ISSN	00983063
Volume Number	56
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Relays Resource management Fading Signal to noise ratio Wireless sensor networks Protocols Analytical models opportunistic cooperation, amplify-andforward, Nakagami-m fading, symbol error rate, optimal power allocation
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Media Technology

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