MMSE-Based Distributed Beamforming in Cooperative Relay Networks

Author

Choi, Jinho

Author_Institution

Sch. of Eng., Swansea Univ., Swansea, UK

Volume

59

Issue

5

fYear

2011

fDate

5/1/2011 12:00:00 AM

Firstpage

1346

Lastpage

1356

Abstract

Distributed beamforming using multiple relay nodes is an effective means to provide power efficient transmission with diversity gain. Various approaches have been proposed to decide relay weights for each relay so that they can cooperatively relay signals. The maximum signal-to-noise ratio (MSNR) has been widely adopted as a performance measure in deciding relay weights. In this paper, we adopt the minimum mean square error (MMSE) to decide relay weights as the MMSE criterion can easily allow distributed implementation with local channel state information (CSI). We also discuss the channel estimation at each relay for distributed beamforming and the impact of the channel estimation error.

Keywords

array signal processing; channel estimation; cooperative communication; diversity reception; mean square error methods; MMSE criterion; MMSE-based distributed beamforming; channel estimation error; channel state information; cooperative relay network; diversity gain; maximum signal-to-noise ratio; minimum mean square error; power efficient transmission; relay node; relay weights; Approximation methods; Array signal processing; Channel estimation; Diversity reception; Fading; Relays; Signal to noise ratio; Distributed beamforming; MMSE approach; relay networks;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOMM.2011.030411.100158

Filename

5733448