Title :
A spatial clustering scheme for downlink beamforming in SDMA mobile radio
Author :
Huang, Wen-Jye ; Doherty, John F.
Author_Institution :
Dept. of Electr. Eng., Pennsylvania State Univ., University Park, PA, USA
Abstract :
We propose a new approach that clusters mobile users before downlink beamforming and broadens beams and nulls within the beamforming calculation. We first investigate the broadening beamforming scheme to alleviate inaccuracies in DOA estimation. Next we exam how to group the mobile users, with the constraint of separation angle, to enhance downlink beamforming. Simulations show that the downlink beamforming complexity is decreased dramatically with limited performance loss
Keywords :
array signal processing; direction-of-arrival estimation; mobile radio; space division multiple access; DOA estimation; SDMA; broadening beamforming; downlink beamforming complexity; mobile radio; nulls; performance loss; separation angle; spatial clustering scheme; Array signal processing; Base stations; Channel capacity; Clustering algorithms; Direction of arrival estimation; Downlink; Land mobile radio; Linear antenna arrays; Multiaccess communication; System performance;
Conference_Titel :
Statistical Signal and Array Processing, 2000. Proceedings of the Tenth IEEE Workshop on
Conference_Location :
Pocono Manor, PA
Print_ISBN :
0-7803-5988-7
DOI :
10.1109/SSAP.2000.870109
