Abstract
A method for improving the performance of an uplink direct sequence code division multiple access (DS-CDMA) communication system for an indoor channel is presented. Spatially smoothed MUSIC is used to separate multipath within a chip duration. Angle and time diversity are realized using parallel beamformers with a RAKE receiver for reducing space and frequency selective fading. Three dimensional ray tracing is used for obtaining vector channel impulse response in a multiuser indoor environment incorporating perfect power control. Simulations are carried out inside a corridor of a multistorey building. Numerical results indicate that the proposed smoothed adaptive beamforming method obtains significant improvement in the channel capacity.
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