Optimal Linear MMSE Beamforming for Two Way Multi-Antenna Relay Systems

Author

Li, Gen ; Wang, Ying ; Zhang, Ping

Author_Institution

Key Lab. of Universal Wireless Commun., Beijing Univ. of Posts & Telecommun., Beijing, China

Volume

15

Issue

5

fYear

2011

fDate

5/1/2011 12:00:00 AM

Firstpage

533

Lastpage

535

Abstract

This letter addresses the beamforming issues for two way relay systems assuming that two source nodes S1 and S2 are equipped with single antenna each and relay node R with multiple antennas. We derive the optimal linear beamforming matrix at R in closed form based on convex optimization techniques, aiming to minimize the weighted mean squared error (MSE). To reduce complexity for implementation, two alternative relay schemes are also presented. In addition, all the proposed schemes´ performance are analyzed and compared in terms of mean squared error (MSE) and computation complexity.

Keywords

antennas; array signal processing; least mean squares methods; computation complexity; convex optimization; multi-antenna relay system; optimal linear MMSE beamforming; optimal linear beamforming matrix; weighted mean squared error; Antennas; Array signal processing; Complexity theory; Data models; Relays; Signal to noise ratio; Silicon carbide; Two way relay; beamforming; mean squared error (MSE); multi-antenna;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2011.030911.110035

Filename

5738307