Subspace Receiver Techniques for DS-CDMA Systems in Space Diffused Vector Channels

This work is motivated by the fact that basestation receiver performance degrades significantly in spatially diffused multipath channels. Herein, this problem is addressed for array DS-CDMA systems in spatially diffused vector channels. Firstly, multipath spatial diffusion is cast as a signal model perturbation problem and then two subspace based receiver techniques are proposed that effectively remove this perturbation. Both approaches give superior performance compared to similar receivers that ignore the spatial spread. Computer simulation results are presented to corroborate the claim.