Title :
Sum-Rate Analysis of MIMO Broadcast Channel with Random Unitary Beamforming
Author :
Lu, Peng ; Yang, Hong-Chuan ; Ko, Young-Chai
Author_Institution :
Univ. of Victoria, Victoria
fDate :
March 31 2008-April 3 2008
Abstract :
In this paper, we present the exact sum-rate analysis of the multiuser MIMO system with random unitary beamforming (RUB). Specifically, with the derived statistics of ordered beam signal to interference and noise ratio, we obtain the analytical expression of system sum rate for arbitrary number of users. The effects of system parameters, including the number of users, the number of transmit antennas and the signal to noise ratio (SNR), on the sum rate are examined through numerical methods. Besides, we develop an upper bound for the sum rate, which reveals that the sum rate with RUB benefits mainly from multiuser directional diversity gain when SNR is high.
Keywords :
MIMO communication; amplification; antennas; numerical analysis; MIMO broadcast channel; multiuser MIMO system; multiuser directional diversity gain; numerical methods; ordered beam signal; random unitary beamforming; signal interference; signal noise ratio; sum-rate analysis; transmit antennas; Array signal processing; Broadcasting; Diversity methods; Interference; MIMO; Signal analysis; Signal to noise ratio; Statistical analysis; Transmitting antennas; Upper bound;
Conference_Titel :
Wireless Communications and Networking Conference, 2008. WCNC 2008. IEEE
Conference_Location :
Las Vegas, NV
Print_ISBN :
978-1-4244-1997-5
DOI :
10.1109/WCNC.2008.99
