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Sensors 2016, 16(9), 1472; doi:10.3390/s16091472

Performance Analysis of Amplify-and-Forward Systems with Single Relay Selection in Correlated Environments

1
Department of Nanobio Materials and Electronics, Gwangju Institute of Science and Technology, Gwangju 61005, Korea
2
School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology, Gwangju 61005, Korea
*
Author to whom correspondence should be addressed.
Received: 8 July 2016 / Accepted: 7 September 2016 / Published: 11 September 2016
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Abstract

In this paper, we consider amplify-and-forward (AnF) cooperative systems under correlated fading environments. We first present a brief overview of existing works on the effect of channel correlations on the system performance. We then focus on our main contribution which is analyzing the outage probability of a multi-AnF-relay system with the best relay selection (BRS) scheme under a condition that two channels of each relay, source-relay and relay-destination channels, are correlated. Using lower and upper bounds on the end-to-end received signal-to-noise ratio (SNR) at the destination, we derive corresponding upper and lower bounds on the system outage probability. We prove that the system can achieve a diversity order (DO) equal to the number of relays. In addition, and importantly, we show that the considered correlation form has a constructive effect on the system performance. In other words, the larger the correlation coefficient, the better system performance. Our analytic results are corroborated by extensive Monte-Carlo simulations. View Full-Text
Keywords: cooperative sensor systems; amplify-and-forward; correlated environments; outage probability; diversity order cooperative sensor systems; amplify-and-forward; correlated environments; outage probability; diversity order
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Van Nguyen, B.; Kim, K.

Performance Analysis of Amplify-and-Forward Systems with Single Relay Selection in Correlated Environments
. Sensors 2016, 16, 1472.

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