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http://dx.doi.org/10.3837/tiis.2016.06.007

Impact of Outdated CSI on the Performance of Incremental Amplify-and-Forward Opportunistic Relaying  

Zhou, Tsingsong (School of Electronic and Information Engineering, Beihang University, and National Key Laboratory of CNS/ATM)
Gao, Qiang (School of Electronic and Information Engineering, Beihang University, and National Key Laboratory of CNS/ATM)
Fei, Li (Wuhan Maritime Communication Research Institute)
Publication Information
KSII Transactions on Internet and Information Systems (TIIS) / v.10, no.6, 2016 , pp. 2567-2582 More about this Journal
Abstract
This paper investigates the impact of outdated channel state information (CSI) on the performance of the incremental amplify-and-forward (AF) opportunistic relaying (OR) over dual-hop Rayleigh fading channels. According to the definition of distribution function, we obtain the cumulative distribution function (CDF) of the actual combined signal-to-noise ratio (SNR) received at the destination. Based on this CDF, the closed-form expressions of the average spectral efficiency and outage probability are derived for the incremental AF OR under outdated CSI. Numerical results show that in the low region of the average SNR of the direct link, outdated CSI deteriorates the system performance, whereas in the high region, outdated CSI has almost no impact on the system performance.
Keywords
Outdated CSI; incremental relaying; amplify-and-forward; opportunistic relaying; average spectral efficiency; outage probability;
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