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Wireless Personal Communications
Published in: Wireless Personal Communications 1/2014

01-03-2014

Probability Analysis of Capacity Gain by Cooperative Relaying Over Single-Hop OSTBC Transmission in Low SNR Regime

Authors: In-Ho Lee, Dongwoo Kim

Published in: Wireless Personal Communications | Issue 1/2014

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Abstract

In this paper, we investigate the capacity gain obtained by putting a multiple-antenna relay in an original single-hop multiple-input multiple-output system using an orthogonal space-time block code over uncorrelated Rayleigh fading channels. As relaying techniques, we consider decode-and-forward relaying as well as decouple-and-forward relaying in which no decoding is performed at the relay. Focusing on the low signal-to-noise ratio regime, closed-form expressions of the probability of the capacity gain are provided for the respective relaying schemes. The probability results in an explicit function of an average power ratio of the per-hop channel in dual-hop relaying to the single-hop channel. Numerical examples show the impact of the power ratio, the relaying strategy, the number of antennas and the relay location on the capacity gain, respectively.
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Appendix
Available only for authorised users
Footnotes
1
It is noted that since the outage performance in this paper is expressed as a function of received SNR, we do not need to explicitly decode the MIMO signal in the simulation but just compute the SNR with a Monte Carlo method. Consequently, we do not use a specific channel estimation method but assume perfect knowledge of channel information at the respective receivers as described in Sect. 2.1.
 
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Metadata
Title
Probability Analysis of Capacity Gain by Cooperative Relaying Over Single-Hop OSTBC Transmission in Low SNR Regime
Authors
In-Ho Lee
Dongwoo Kim
Publication date
01-03-2014
Publisher
Springer US
Published in
Wireless Personal Communications / Issue 1/2014
Print ISSN: 0929-6212
Electronic ISSN: 1572-834X
DOI
https://doi.org/10.1007/s11277-013-1363-x

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