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Cooperative Communication Protocols in Wireless Networks: Performance Analysis and Optimum Power Allocation
BibTeX
@MISC{Commun_cooperativecommunication,
author = {Wireless Pers Commun and W. Su (b and K. J. Ray Liu},
title = {Cooperative Communication Protocols in Wireless Networks: Performance Analysis and Optimum Power Allocation},
year = {}
}
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Abstract
Abstract In this paper, symbol-error-rate (SER) performance analysis and optimum power allocation are provided for uncoded cooperative communications in wireless networks with either decode-and-forward (DF) or amplify-and-forward (AF) cooperation protocol, in which source and relay send information to destination through orthogonal channels. In case of the DF cooperation systems, closed-form SER formulation is provided for uncoded cooperation systems with PSK and QAM signals. Moreover, an SER upper bound as well as an approximation are established to show the asymptotic performance of the DF cooperation systems, where the SER approximation is asymptotically tight at high signal-to-noise ratio (SNR). Based on the asymptotically tight SER approximation, an optimum power allocation is determined for the DF cooperation systems. In case of the AF cooperation systems, we obtain at first a simple closed-form moment generating function (MGF) expression for the harmonic mean to avoid the hypergeometric functions as commonly used in the literature. By taking advantage of the simple MGF expression, we obtain a closed-form SER performance analysis for the AF cooperation systems with PSK and QAM signals. Moreover, an SER approximation is also established which is asymptotically tight at high SNR. Based on the
Keyphrases
optimum power allocation performance analysis wireless network cooperative communication protocol df cooperation system qam signal ser approximation af cooperation system uncoded cooperative communication simple mgf expression simple closed-form moment harmonic mean high snr ser upper bound hypergeometric function cooperation protocol uncoded cooperation system orthogonal channel high signal-to-noise ratio send information closed-form ser performance analysis tight ser approximation closed-form ser formulation asymptotic performance
