Title :
Multi-User Gain and Maximum Eigenmode Beamforming for MIMO Systems with Rate Constraints
Author :
Ping, Li ; Wang, Peng
Author_Institution :
City Univ. of Hong Kong, Hong Kong
Abstract :
We consider the sum-power minimization problem for multi-user multiple-input multiple-output (MIMO) systems with rate constraints. We show that significant performance improvements, qualified by multiuser gain (MUG), can be achieved by allowing multiple users to transmit simultaneously on their individual maximum eigenmodes. We also show that a major part of MUG can be achieved even with quite a small number of users and increasing the number of antennas at the base station is an efficient method for maximizing MUG.
Keywords :
MIMO communication; antenna arrays; eigenvalues and eigenfunctions; MIMO systems; antennas; maximum eigenmode beamforming; multiuser gain; multiuser multiple-input multiple-output systems; rate constraints; sum-power minimization problem; Array signal processing; Base stations; Delay effects; Iterative algorithms; MIMO; Mobile antennas; Performance gain; Rayleigh channels; Receiving antennas; Transmitting antennas;
Conference_Titel :
Information Theory for Wireless Networks, 2007 IEEE Information Theory Workshop on
Conference_Location :
Solstrand
Print_ISBN :
978-1-4244-1200-6
Electronic_ISBN :
978-1-4244-1200-6
DOI :
10.1109/ITWITWN.2007.4318044