Title :
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.
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;
Conference_Titel :
Wireless Communications and Networking Conference, 2007.WCNC 2007. IEEE
Conference_Location :
Kowloon
Print_ISBN :
1-4244-0658-7
Electronic_ISBN :
1525-3511
DOI :
10.1109/WCNC.2007.198
