Table of Contents
ISRN Signal Processing
Volume 2011, Article ID 735695, 6 pages
http://dx.doi.org/10.5402/2011/735695
Research Article

Combined Transceiver Optimization for Uplink Multiuser MIMO with Limited CSI

Department of Communications Engineering, National Chung Cheng University, 168 University Road, Min-Hsiung, Chiayi 621, Taiwan

Received 23 December 2010; Accepted 12 January 2011

Academic Editors: S. K. Bhatia and M. A. Nappi

Copyright © 2011 Chia-Chang Hu and Chung-Lun Yang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Joint precoder and decoder optimization is considered for uplink multiuser multiple-input multiple-output (MU-MIMO) systems with limited channel state information (CSI) at both the transmitters and receivers. Instead of counting on complex iterative-based algorithms, an efficient and noniterative QR-based linear transceiver pair design is employed. In addition, an equal power distribution (EPD) scheme is applied to adjust transmit power allocation of each mobile station (MS) between its symbols under the total transmit-power constraint. Simulations are conducted to provide a comparative evaluation of the proposed QR-EPD algorithm with other transceiver designs on the sum mean-squared error (SMSE) and the averaged bit-error-rate (BER) performance.