A Capacity Achieving Precoding Scheme Based on Partial Channel Information for Broadcast MIMO Systems

Author

Bahrami, Hamid Reza ; Le-Ngoc, Tho

Author_Institution

Dept. of ECE, McGill Univ., Montreal, Que.

fYear

2007

fDate

11-15 March 2007

Firstpage

1045

Lastpage

1050

Abstract

This paper presents a zero-forcing algorithm based on the partial channel knowledge to select the best users for transmission without causing interference to others in a broadcast MIMO system. The proposed scheme preserves the optimal achievable ergodic sum capacity of zero-forcing techniques in limit of large number of active users with significant reduction in complexity and feedback load for channel information updates. Both analytical and simulation results on its advantages in feedback load, complexity and achievable sum rate are presented in different scenarios.

Keywords

MIMO communication; channel capacity; multi-access systems; precoding; broadcast MIMO systems; broadcast channel; capacity achieving precoding scheme; channel information updates; feedback load; multiuser system; partial channel information; partial channel knowledge; zero-forcing algorithm; Analytical models; Broadcasting; Communication systems; Communications Society; Covariance matrix; Feedback; Interference; MIMO; Throughput; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference, 2007.WCNC 2007. IEEE

Conference_Location

Kowloon

ISSN

1525-3511

Print_ISBN

1-4244-0658-7

Electronic_ISBN

1525-3511

Type

conf

DOI

10.1109/WCNC.2007.198

Filename

4224443