Codebook Design for Cross-Polarized Linear Antenna Array in 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 system spectrum efficiency. However, the benefits of multi-user (MU) MIMO highly rely on an accurate channel knowledge at the transmitter. So proper codebook design is a key problem for LTE-A FDD downlink system. In this paper, the channel characteristic specific to cross-polarized linear antenna array is analyzed, then its codebook design based on amplitude and phase adjustment is proposed for LTE-A downlink system. The proposed codebooks are compared to the differential scheme [7] on the average cell spectral efficiency and cell-edge user spectral efficiency evaluated through system level simulations. Simulation results show that the proposed codebooks significantly improve channel feedback efficiency and system performance.

Keywords

Long Term Evolution; linear antenna arrays; radio links; LTE-A FDD downlink system; LTE-A downlink system; LTE-Advanced; cell-edge user spectral efficiency; channel characteristic; channel feedback efficiency; codebook design; cross-polarized linear antenna array; long term evolution; multiple input multiple output; multiuser MIMO; system level simulation; system performance; system spectrum efficiency; Arrays; Downlink; Equations; Linear antenna arrays; MIMO; Mathematical model; Proposals;

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.2011.6092989

Filename

6092989