Adaption feedback of precoding matrix indicator for 3GPP LTE/LTE-A system

Author

Cui, Linli ; Qi, Chaoran ; Chen, Yuan ; Shao, ZhenHai

Author_Institution

Sch. of Commun. & Inf. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

fYear

2012

fDate

10-11 May 2012

Firstpage

1

Lastpage

4

Abstract

Limited feedback of channel state information (CSI), which is made up of rank indicator (RI), precoding matrix indicator (PMI) and channel quality indicator (CQI), is an important part in closed-loop transmission for 3GPP Long Time Evolution (LTE)/LTE-Advanced standard. In this paper, an efficient way, where PMI granularity selection method is used in PMI feedback mechanism, is presented to adaptively choose PMI granularity to track the channel variation, especially for fast fading channel. Simulation results show that the adaption feedback of PMI can get a better spectral efficiency and lower BER without much computational cost.

Keywords

3G mobile communication; Long Term Evolution; fading channels; precoding; 3GPP LTE system; 3GPP LTE-advanced standard; 3GPP Long Time Evolution; BER; adaption feedback; channel quality indicator; channel state information; closed-loop transmission; fading channel; limited feedback; precoding matrix indicator granularity selection method; rank indicator; Bandwidth; Bit error rate; Channel estimation; Fading; MIMO; System performance; Throughput; LTE; MIMO; PMI; Precoding;

fLanguage

English

Publisher

ieee

Conference_Titel

High Speed Intelligent Communication Forum (HSIC), 2012 4th International

Conference_Location

Nanjing, Jiangsu

Print_ISBN

978-1-4673-0678-2

Electronic_ISBN

978-1-4673-0676-8

Type

conf

DOI

10.1109/HSIC.2012.6212976

Filename

6212976