Title :
New adaptive downlink beamforming method for WCDMA system
Author :
Donghee Shim ; Alam, F.
Author_Institution :
R&D Center, LG Electron. Inc., Kyoungki
Abstract :
One of the main issues for downlink beamforming with a smart antenna system is the impact of the desired user on other subscribers. Downlink beamforming for the desired user will change the interference to all other subscribers. We propose a new algorithm employing the conjugate gradient method (CGM) to mitigate the effect of interference. This algorithm is termed adaptive interference mitigation using CGM (AIM-CGM). We compare the performance of this algorithm with a conventional beamformer using the signal format of frequency division duplexing (FDD) wideband code division multiple access (W-CDMA)
Keywords :
adaptive antenna arrays; array signal processing; cellular radio; code division multiple access; frequency division multiplexing; interference suppression; radiofrequency interference; CGM; FDD; W-CDMA system; adaptive downlink beamforming; adaptive interference mitigation; cellular mobile communication system; conjugate gradient method; frequency division duplexing; smart antenna; wideband code division multiple access; Array signal processing; Direction of arrival estimation; Downlink; Fading; Frequency conversion; Interference; Mobile antennas; Multiaccess communication; Synthetic aperture sonar; User-generated content;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd
Conference_Location :
Rhodes
Print_ISBN :
0-7803-6728-6
DOI :
10.1109/VETECS.2001.944822
