Title :
Sum-rate analysis of multiuser MIMO system with zero-forcing transmit beamforming
Author :
Lu, Peng ; Yang, Hong-Chuan
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Victoria, Victoria, BC, Canada
fDate :
9/1/2009 12:00:00 AM
Abstract :
In this letter, we present the exact sum-rate analysis of the multiuser multiple-input multiple-output (MIMO) systems with zero-forcing transmit beamforming (ZFBF). We develop the analytical expressions of the ergodic sum-rate for two low-complexity user selection strategies for the dual-transmit-antenna scenario. Based on the analytical results, we examine the parameter optimization problem to properly trade off between channel power gain and directional gain in term of maximizing the ergodic sum rate.
Keywords :
MIMO communication; array signal processing; multiuser channels; channel directional gain; channel power gain; dual-transmit-antenna scenario; multiuser MIMO system; multiuser multiple-input multiple-output system; parameter optimization; sum-rate analysis; zero-forcing transmit beamforming; Analytical models; Array signal processing; Base stations; Broadcasting; Design optimization; Interference elimination; MIMO; Random variables; Transmitting antennas; Wireless communication; MIMO broadcast channel, zero-forcing beamforming, multiuser diversity, sum-rate analysis, and wireless communications.;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2009.09.070583
