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

fYear

2008

fDate

March 31 2008-April 3 2008

Firstpage

533

Lastpage

537

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference, 2008. WCNC 2008. IEEE

Conference_Location

Las Vegas, NV

ISSN

1525-3511

Print_ISBN

978-1-4244-1997-5

Type

conf

DOI

10.1109/WCNC.2008.99

Filename

4489130