| The use of multiuser detection and beamforming techniques in Code Division Multiple Access systems has become a promising approach towards enhancing signal quality and reducing multiple access interference. In this work, a framework for multitarget beam-forming built on the concept of Despread-Respread is first presented. Next, based on the one-step Kalman Filter Predictor algorithm the Despread-Respread Kalman Predictor Multitarget Array (DR-KPMTA) algorithm is developed. The incorporation of a Minimum Output Energy (MOE) detector at the output of the DR-KPMTA receiver is also examined and a novel space-time processor is proposed. Simulations in various channel imperfections indicate an improvement of the DR-KPMTA algorithm over other Despread-Respread-based algorithms. Furthermore, the MOE-based space-time approach can further suppress the residual interference at the output of the spatial processor, in situations where interfering signals have the same direction of arrival. |
