Title :
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
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;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2007. WiCom 2007. International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-1311-9
DOI :
10.1109/WICOM.2007.224
