A joint scheduling and precoding scheme based on sum chord distance in MU-MIMO system with limited feedback

Author

Xun Luo ; Yang Yang ; Shu Fang ; Shaoqian Li

Author_Institution

Nat. Key Lab. of Sci. & Technol. on Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

fYear

2011

fDate

14-16 Oct. 2011

Firstpage

55

Lastpage

59

Abstract

In this paper, we propose a joint scheduling and precoding scheme in MU-MIMO downlink channel with limited feedback. Each user feeds back the index which indicates the channel direction in a predefined codebook and one scalar denoting the quantization error. With the feedback information, the base station schedules the first user with the minimal quantization error. And then it schedules the users with the metric based on the sum of two chord distances. Compared with the traditional joint scheduling and precoding based on ZF-CI, our proposed scheme can restrain the performance loss caused by quantization error and reduce the feedback. Further, the sum rate is greatly improved as SNR increases. Simulation results are exhibited to verify its effectiveness.

Keywords

MIMO communication; feedback; precoding; scheduling; MU-MIMO downlink channel system; ZF-CI; base station scheduling scheme; channel direction; limited feedback reduction; minimal quantization error; precoding scheme; predefined codebook; sum chord distance; MU-MIMO; chord distance; limited feedback; precoding; scheduling;

fLanguage

English

Publisher

iet

Conference_Titel

Communication Technology and Application (ICCTA 2011), IET International Conference on

Conference_Location

Beijing

Type

conf

DOI

10.1049/cp.2011.0629

Filename

6192825