Home // PESARO 2011, The First International Conference on Performance, Safety and Robustness in Complex Systems and Applications // View article
Authors:
Alexis Dowhuszko
Turo Halinen
Jyri Hämäläinen
Olav Tirkkonen
Keywords: Cooperative communications; distributed beamforming; limited feedback; outage probability; relay nodes
Abstract:
This paper studies the impact of channel signaling resolution on the performance of a (coherent) distributed beamforming (DBF) algorithm. This analysis is done in the context of a wireless access network, whose ultimate goal is to give adequate broadband coverage for users inside buildings. In this situation, instead of trying to reach the serving base station (BS) directly, we assume that each indoor subscriber receives assistance from a cooperative network that is deployed in its premises. This surrounding cooperative network is formed by a (relative) large number of low-cost relay nodes (RNs) with only one antenna. To simplify the analysis, communication in the first link (i.e., from the subscriber's terminal to RNs) is assumed costless, making the bottleneck lay in the second link (i.e., from RNs to serving BS). To carry out the analysis, a suitable closed-form approximation for the outage probability that correspond to a given received signal-to-noise power ratio (SNR) threshold is derived. Our analysis reveals that the power gain sacrificed when using a small amount of phase feedback information is not considerable in the light of the performance loss that is observed.
Pages: 28 to 34
Copyright: Copyright (c) IARIA, 2011
Publication date: April 17, 2011
Published in: conference
ISSN: 2308-3700
ISBN: 978-1-61208-132-8
Location: Budapest, Hungary
Dates: from April 17, 2011 to April 22, 2011