Paper Info
Title
Multi-pair amplify-and-forward relaying with very large antenna arrays
Abstract
We consider a multi-pair relay channel where multiple sources simultaneously communicate with destinations using a relay. Each source or destination has only a single antenna, while the relay is equipped with a very large antenna array. We investigate the power efficiency of this system when maximum ratio combining/maximal ratio transmission (MRC/MRT) or zero-forcing (ZF) processing is used at the relay. Using a very large array, the transmit power of each source or relay (or both) can be made inversely proportional to the number of relay antennas while maintaining a given quality-of-service. At the same time, the achievable sum rate can be increased by a factor of the number of source-destination pairs. We show that when the number of antennas grows to infinity, the asymptotic achievable rates of MRC/MRT and ZF are the same if we scale the power at the sources. Depending on the large scale fading effect, MRC/MRT can outperform ZF or vice versa if we scale the power at the relay.
Year
DOI
Venue
2013
10.1109/ICC.2013.6655302
Communications
Keywords
DocType
Volume
amplify and forward communication,antenna arrays,diversity reception,quality of service,relay networks (telecommunication),MRC-MRT,fading effect,maximal ratio transmission,maximum ratio combining,multipair amplify-and-forward relaying,multipair relay channel,power efficiency,quality of service,relay antennas,source-destination pairs,very large antenna arrays,zero-forcing processing
Conference
abs/1303.1201
ISSN
Citations 
PageRank 
1550-3607
68
2.12
References 
Authors
10
5
Name
Order
Citations
PageRank
Himal A. Suraweera12639117.31
Hien Quoc Ngo22546129.55
Trung Q. Duong32911171.22
Chau Yuen44493263.28
Erik G. Larsson510189605.81