Sum MSE Uplink-Downlink Duality of Multiuser Amplify-and-Forward MIMO Relay Systems

Author

Liu, Jun ; Qiu, Zhengding

Author_Institution

Beijing Key Lab. of Adv. Inf. Sci. & Network Technol., Beijing Jiaotong Univ., Beijing, China

fYear

2011

fDate

5-8 Sept. 2011

Firstpage

1

Lastpage

5

Abstract

In this paper, we consider a two-hop multiuser amplify-and-forward MIMO relay system with multi-antenna nodes. By taking the antenna correlation and channel estimation error into account, the problems of minimum sum mean square error (MSE) transceiver optimization for the uplink and the dual downlink are formulated. When the direction of transmission is reversed and the total power constraints of the source and the relay are switched, an uplink-downlink duality in terms of average sum MSE region is established based on the Karush-Kuhn-Tucker (KKT) conditions of both problems. As a consequence of this duality, the downlink transceiver optimization satisfying the KKT conditions can be solved by focusing on an equivalent uplink problem, and vice versa. Simulation results are provided to demonstrate our analysis.

Keywords

MIMO communication; amplify and forward communication; antennas; channel estimation; mean square error methods; multi-access systems; optimisation; radio transceivers; KKT conditions; Karush-Kuhn-Tucker conditions; MSE transceiver optimization; MSE uplink-downlink duality; antenna correlation; channel estimation error; minimum sum mean square error transceiver optimization; multiantenna nodes; multiuser amplify-and-forward MIMO relay systems; Channel estimation; Downlink; Estimation error; MIMO; Optimization; Relays; Transceivers;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference (VTC Fall), 2011 IEEE

Conference_Location

San Francisco, CA

ISSN

1090-3038

Print_ISBN

978-1-4244-8328-0

Type

conf

DOI

10.1109/VETECF.2011.6092904

Filename

6092904