Codebook Design for LTE-A Downlink System

Author

Wu, Lu ; Chen, Jinhui ; Yang, Hongwei ; Lu, Di

Author_Institution

Res. & Innovation Center, Alcatel-Lucent Shanghai Bell, Shanghai, China

fYear

2011

fDate

5-8 Sept. 2011

Firstpage

1

Lastpage

5

Abstract

Multiple-input multiple-output (MIMO) has been adopted by long term evolution (LTE) and its updated version LTE-Advanced (LTE-A) to increase the spectrum efficiency. However, the benefits of multi-user (MU) MIMO highly rely on the accurate channel knowledge at the transmitter. So proper codebook design is a key problem for LTE-A FDD downlink system. In this paper, a codebook design with phase adjustment in the precoder targeting wideband channel properties is proposed. The average cell spectrum efficiency and cell-edge user spectrum efficiency of the proposed scheme are evaluated through system level simulation and compared to the discrete Fourier transform (DFT) based feedback scheme. The results show that the proposed codebooks significantly improve feedback efficiency and system performance for co-polarized linear antenna array.

Keywords

Long Term Evolution; MIMO communication; codecs; discrete Fourier transforms; feedback; linear antenna arrays; precoding; telecommunication channels; DFT based feedback scheme; LTE-A FDD downlink system; LTE-A downlink system; MIMO; cell-edge user spectrum; codebook design; copolarized linear antenna array; discrete Fourier transform; feedback efficiency; long term evolution; multi-user MIMO; multiple-input multiple-output; precoder targeting wideband channel properties; Antenna feeds; Arrays; Discrete Fourier transforms; Downlink; MIMO; Vectors;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference (VTC Fall), 2011 IEEE

Conference_Location

San Francisco, CA

ISSN

1090-3038

Print_ISBN

978-1-4244-8328-0

Type

conf

DOI

10.1109/VETECF.2011.6092993

Filename

6092993