ZF Beamforming Performance Analysis for Multiuser Spatial Multiplexing with Imperfect Channel Feedback

Author

Lee Li ; Wang Jing ; Wu Xiaoyun

Author_Institution

Dept. of Electron. Eng., Tsinghua Univ., Beijing

fYear

2007

fDate

21-25 Sept. 2007

Firstpage

869

Lastpage

872

Abstract

In this paper, we focus on downlink zero forcing (ZF) beamforming design scheme for multiuser (MU) spatial multiplexing (SM) multiple-input multiple-output (MIMO) systems. Based on the minimum average probability of symbol error (PSE), we give the optimal design method of the beamforming weight matrices. Furthermore, we derive the upper bound PSEs to evaluate the impact of channel feedback errors on the system performance. Comparison of the upper bounds of the average PSE for several schemes shows that the downlink ZF beamforming for multiuser spatial multiplexing MIMO schemes provide almost the same performance as the SU beamforming scheme.

Keywords

MIMO communication; multiplexing; MIMO; beamforming weight matrix; downlink zero forcing beamforming design; imperfect channel feedback; minimum average probability; multiple-input multiple-output systems; multiuser spatial multiplexing; symbol error; Array signal processing; Downlink; Feedback; MIMO; Performance analysis; Receiving antennas; Samarium; System performance; Transmitters; Upper bound;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications, Networking and Mobile Computing, 2007. WiCom 2007. International Conference on

Conference_Location

Shanghai

Print_ISBN

978-1-4244-1311-9

Type

conf

DOI

10.1109/WICOM.2007.224

Filename

4339999