Title :
Non-Unitary Codebook Based Precoding Scheme for Multi-User MIMO with Limited Feedback
Author :
Shu, Fang ; Lihua, Li ; Qimei, Cui ; Ping, Zhang
Author_Institution :
Beijing Univ. of Posts & Telecommun., Beijing
fDate :
March 31 2008-April 3 2008
Abstract :
In this paper, we propose a non-unitary codebook based precoding scheme for multi-user MIMO (MU-MIMO) downlink transmission with limited feedback The proposed MU- MIMO scheme will perform scheduling and precoding just according to the limited feedback of the signal to interference and noise ratio (SINR) of each user to enhance the system capacity. A precoder codebook design method is related to Grassmannian line packing criterion. We group vectors from the Grassmannian codebook into precoding matrices according to the correlation coefficient of the vectors to suppress the multi-user co-channel interference (CCI). It terms as non-unitary precoding and outperforms the traditional single user MIMO system as well as the unitary codebook based MU-MIMO scheme with limited feedback and low complexity.
Keywords :
MIMO communication; channel coding; cochannel interference; correlation methods; feedback; interference suppression; matrix algebra; precoding; scheduling; wireless channels; correlation coefficient; limited feedback; multiuser MIMO downlink transmission; multiuser co-channel interference suppression; nonunitary Grassmannian codebook based precoding scheme; scheduling; Broadcasting; Channel capacity; Downlink; Feedback; Interchannel interference; MIMO; Mobile antennas; Radiofrequency interference; Signal to noise ratio; Wireless communication;
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.2008.125