Study on codeword selection for per-cell codebook with limited feedback in CoMP systems

Author

Zhirui Hu ; Tiankui Zhang ; Chunyan Feng ; Qiubin Gao ; Shaohui Sun

Author_Institution

Beijing Key Laboratory of Network System Architecture and Convergence, Beijing University of Posts and Telecommunications, China

fYear

2013

fDate

7-10 April 2013

Firstpage

3140

Lastpage

3145

Abstract

Per-cell codebook based precoding is an effective transmission method in coordinated multi-point (CoMP) systems with the limited feedback constraint. There are two codeword selection methods for per-cell codebook, one is joint codeword selection (JCS) and another is independent codeword selection (ICS). In this paper, the system throughput obtained by the JCS and the ICS is analyzed firstly, which shows that JCS has a better trade-off between system throughput and feedback overhead. Then a codebook compression scheme for the JCS is proposed, which decreases the selection complexity of JCS by reducing the size of the codebook. Simulation results show that the proposed scheme can decrease the selection complexity greatly with tiny loss on performance and no additional feedback overhead.

Keywords

Complexity theory; Joints; MIMO; Quantization (signal); Simulation; Throughput; Vectors; CoMP system; codebook compression; limited feedback; per-cell codebook;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference (WCNC), 2013 IEEE

Conference_Location

Shanghai, Shanghai, China

ISSN

1525-3511

Print_ISBN

978-1-4673-5938-2

Electronic_ISBN

1525-3511

Type

conf

DOI

10.1109/WCNC.2013.6555064

Filename

6555064