Title :
Multi-User MIMO Linear Precoding with Grassmannian Codebook
Author :
Shu, Fang ; Gang, Wu ; Yue, Xiao ; Shao-qian, Li
Author_Institution :
Nat. key Lab. of Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu
Abstract :
In this paper, multi-user MIMO (MU-MIMO) linear precoding schemes with Grassmannian codebook for downlink transmission are proposed. The proposed MU-MIMO schemes extend the point-to-point single-user Grassmannian precoding to point-to-multipoint multi-user Grassmannian precoding. We proposed two MU-MIMO schemes with the Grassmannian codebook. One scheme assumes the perfect channel information at the base station and the other scheme is under the limited feedback. These MU-MIMO linear precoding schemes with Grassmannian codebook provide significant system capacity enhancement compared with the single user MIMO (SU-MIMO) system. The results also show the performance gap between perfect channel information and limited feedback.
Keywords :
MIMO communication; feedback; linear codes; precoding; wireless channels; Grassmannian codebook; base station; capacity enhancement; downlink transmission; limited feedback; multiuser MIMO linear preceding; perfect channel information; point-to-multipoint multiuser Grassmannian preceding; point-to-point single-user Grassmannian preceding; Base stations; Downlink; Feedback; MIMO; Mobile communication; Mobile computing; Noise cancellation; Null space; Radiofrequency interference; Transmitters; Multi-user MIMO; Precoding; codebook;
Conference_Titel :
Communications and Mobile Computing, 2009. CMC '09. WRI International Conference on
Conference_Location :
Yunnan
Print_ISBN :
978-0-7695-3501-2
DOI :
10.1109/CMC.2009.188
