Linear MMSE Processing Design for 3-Phase Two-Way Cooperative MIMO 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

19

Issue

7

fYear

2012

fDate

7/1/2012 12:00:00 AM

Firstpage

443

Lastpage

446

Abstract

This letter addresses the joint linear processing issues for 3-phase two way cooperative MIMO relay systems, aiming to minimize the mean squared error (MMSE). Considering the difficulty to acquire the channel state information (CSI) of the direct link at relay node, we first derive an iterative linear processing scheme for the relay node ignoring the direct link between two source nodes. Then the receive processing matrix combining the signal from direct link and relay link can be easily given according to MMSE orthogonality principle. Finally by comparing other schemes that can accomplish bidirectional data exchange, simulation results show that our proposed 3-phase cooperative scheme can achieve better tradeoff of link reliability and spectrum efficiency especially when the direct link is in medium quality.

Keywords

MIMO communication; cooperative communication; least mean squares methods; telecommunication network reliability; 3-phase cooperative scheme; 3-phase two-way cooperative MIMO relay systems; bidirectional data exchange; channel state information; direct link; iterative linear processing; joint linear processing issues; linear MMSE processing design; link reliability; receive processing matrix; relay node ignoring; spectrum efficiency; two source nodes; Array signal processing; Equations; Joints; MIMO; Optimization; Relays; Vectors; 3-phase cooperative; Linear processing; MMSE; two way relay;

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/LSP.2012.2191812

Filename

6174446