Title :
An Uplink SDMA System with Reduced Near-Far Problem and MIMO Channel Correlations
Author :
Dawod, Nadem H. ; Hafez, Roshdy H M ; Marsland, Ian
Author_Institution :
Dept. of Syst. & Comput. Eng., Carleton Univ., Ottawa, ON
Abstract :
Mobile users scattered in a microcell and communicating with co-located base station antennas, may cause a severe near-far problem for an uplink space division multiple access (SDMA) system. Also correlations within the multi-input multi-output (MIMO) channel matrix, in such uplink SDMA propagation scenario, can cause significant degradation in system performance. In this paper, we investigate the above problems. We propose to distribute the base station antennas, as multi- antenna arrays, at different sites in the microcell and deploy a correlation reduction algorithm. A significant improvement in the performance of the SDMA system is evident.
Keywords :
MIMO communication; antenna arrays; matrix algebra; mobile communication; radio links; space division multiple access; wireless channels; MIMO channel correlations; basestation antennas; correlation reduction algorithm; mobile users; multiantenna arrays; multiinput multioutput channel; near-far problem; space division multiple access; uplink SDMA system; Antennas and propagation; Base stations; Degradation; MIMO; Microcell networks; Mobile antennas; Multiaccess communication; Scattering; Space stations; System performance;
Conference_Titel :
Vehicular Technology Conference, 2006. VTC-2006 Fall. 2006 IEEE 64th
Conference_Location :
Montreal, Que.
Print_ISBN :
1-4244-0062-7
Electronic_ISBN :
1-4244-0063-5
DOI :
10.1109/VTCF.2006.93
