FDD DS-CDMA downlink beamforming by modifying uplink beamforming weights

Author

Liang, Ying-Chang ; Chin, Fiancois P S

Author_Institution

Centre for Wireless Commun., Singapore

Volume

1

fYear

2000

fDate

2000

Firstpage

170

Abstract

Two new suboptimal algorithms are proposed for downlink beamforming in FDD DS-CDMA mobile radio by using uplink beamforming weights. One is the null constraint (NC) method, which constrains the same null positions for both the uplink and downlink. The other is the frequency calibration (FC) method, which constrains the same main beam positions for both links. Even though the new algorithms are simple, they may provide a larger capacity enhancement as compared with the DOA methods which just direct the main beam toward the desired user

Keywords

array signal processing; calibration; code division multiple access; direction-of-arrival estimation; land mobile radio; linear antenna arrays; multiuser channels; radio links; spread spectrum communication; DOA method; FC-MMSE; FDD DS-CDMA downlink beamforming; NC-MMSE; RAKE receivers; base station antenna array; capacity enhancement; frequency calibration method; mobile radio; null constraint method; signal detection; suboptimal algorithms; uniform linear array; uplink beamforming weights modification; 3G mobile communication; Array signal processing; Base stations; Calibration; Downlink; Multiaccess communication; Power control; Signal detection; Wideband; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2000. IEEE-VTS Fall VTC 2000. 52nd

Conference_Location

Boston, MA

ISSN

1090-3038

Print_ISBN

0-7803-6507-0

Type

conf

DOI

10.1109/VETECF.2000.886649

Filename

886649