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Type: Artigo
Title: Distributed TAS/MRC and TAS/SC schemes for fixed-gain AF systems with multiantenna relay: outage performance
Author: Gonzalez, Diana Cristina
Costa, Daniel Benevides da
Santos Filho, Jose Candido Silveira
Abstract: Although transmit-antenna selection (TAS) is an alternative low-cost strategy to capture the advantages of multiantenna systems, its application may require a large amount of feedback transmissions. Owing to this fact and in order to reduce such requirement, herein we analyze the outage performance of two distributed TAS (DAS) schemes. One scheme employs maximal-ratio combining (DAS/MRC) at the destination, whereas the other employs selection combining (DAS/SC). We consider a dual-hop fixed-gain amplify-and-forward relaying network, equipped with multi-antenna source/relay nodes and a single-antenna destination. A lower bound expression is derived for the outage probability of each investigated scheme. Importantly, the derived bounds prove to be very tight approximations to the exact outage performance. Also, capitalizing on a strikingly interesting property of Stirling numbers of the second kind, we provide closed-form asymptotic expressions for the obtained bounds. Our results show that the diversity order of the proposed distributed schemes is identical to that of their optimal centralized counterparts, namely N-t + min(N-rr, N-rt), with N-t, N-rr, and N-rt denoting the number of transmit antennas at the source, the number of receive antennas at the relay, and the number of transmit antennas at the relay, respectively. In addition, as the relay approaches the destination, the outage performance of the proposed schemes approaches the optimal one
Subject: Antenas de transmissão
Country: Estados Unidos
Editor: Institute of Electrical and Electronics Engineers
Rights: Fechado
Identifier DOI: 10.1109/TWC.2016.2540628
Date Issue: 2016
Appears in Collections:FEEC - Artigos e Outros Documentos

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