Successive precoding and user selection in MU-MIMO broadcast channel with limited feedback

Author

Long Chen ; Zhi Chen ; Li Liu ; Bin Fu

Author_Institution

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

fYear

2014

fDate

9-11 April 2014

Firstpage

1

Lastpage

5

Abstract

In this paper, we propose a joint successive pre-coding and user selection algorithm in multi-user multiple-input multiple-output (MIMO) broadcast channel with limited feedback. The proposed scheme recalculates each user´s best precoding vector by projecting the original precoding vector, which is obtained by limited feedback, onto the orthogonal complement space of the precoding vectors of the selected users. The base station (BS) then calculates the estimated signal-to-interference-plus-noise ratio (SINR) for each unselected user using the best precoding vector, and choose the one with the largest SINR. Numerical results illustrate the performance of the scheme.

Keywords

MIMO communication; broadcast channels; computational complexity; feedback; multiuser channels; orthogonal codes; precoding; MU-MIMO broadcast channel; SINR; base station; multiuser multiple-input multiple-output broadcast channel; orthogonal complement space; precoding vector; signal-to-interference-plus-noise ratio; successive precoding; user selection; Antennas; Interference; Joints; MIMO; Signal to noise ratio; Throughput; Vectors; limited feedback; multi-user MIMO; precoding; user selection;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Telecommunications Symposium (WTS), 2014

Conference_Location

Washington, DC

Type

conf

DOI

10.1109/WTS.2014.6835025

Filename

6835025