Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/327889
Type: Artigo
Title: Distributed Tas/mrc And Tas/sc Schemes For Fixed-gain Af Systems With Multiantenna Relay: Outage Performance
Author: Gonzalez
Diana Cristina; da Costa
Daniel Benevides; Silveira Santos Filho
Jose Candido
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: Cooperative Diversity
Fixed-gain Relays
Outage Probability
Relay Channel
Transmit Antenna Selection
Editor: IEEE-Inst Electrical Electronics Engineers Inc
Piscataway
Rights: fechado
Identifier DOI: 10.1109/TWC.2016.2540628
Address: http://ieeexplore.ieee.org.ez88.periodicos.capes.gov.br/document/7438937/
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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