DocumentCode :
2780536
Title :
Hadamard Transform Based Codebook Design for Uniform Circular Arrays in Mobile Radio Communications
Author :
Lu Wu ; Hongwei Yang ; Dongyao Wang
Author_Institution :
Res. & Innovation Center, Alcatel-Lucent Shanghai Bell, Shanghai, China
fYear :
2012
fDate :
3-6 Sept. 2012
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 spectrum efficiency. However, the benefits of multi-user (MU) MIMO highly rely on the accurate channel knowledge at transmitter. So proper codebook design is a key problem for frequency division multiplexing (FDD) downlink systems. In this paper, an efficient codebook design based on Hadamard transform is proposed for uniform circular arrays. Then a two-stage feedback scheme is further proposed to reduce the feedback overhead. The average cell spectrum efficiency and cell-edge user spectrum efficiency of the proposed scheme are evaluated through system level simulation and compared with LTE Rel-10 feedback. The results show that the proposed codebook significantly improves feedback efficiency and system performance.
Keywords :
Hadamard codes; Hadamard transforms; Long Term Evolution; MIMO communication; antenna arrays; feedback; frequency division multiplexing; mobile antennas; FDD downlink systems; Hadamard transform based codebook design; LTE Rel-10 feedback; LTE-A; LTE-Advanced; Long Term Evolution; MIMO system; MU MIMO; cell-edge user spectrum efficiency; feedback overhead; frequency division multiplexing downlink systems; mobile radio communications; multiple-input multiple-output system; multiuser MIMO; system level simulation; transmitter; two-stage feedback scheme; uniform circular antenna arrays; Downlink; Equations; Error correction; Error correction codes; Linear antenna arrays; MIMO; Mathematical model;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference (VTC Fall), 2012 IEEE
Conference_Location :
Quebec City, QC
ISSN :
1090-3038
Print_ISBN :
978-1-4673-1880-8
Electronic_ISBN :
1090-3038
Type :
conf
DOI :
10.1109/VTCFall.2012.6398915
Filename :
6398915
Link To Document :
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