Serial Acquisition of DS-CDMA Signals using Smart Antennas and Adaptive Thresholding Constant False Alarm Rate Processing

This paper proposes an adaptive pseudonoise (PN) code acquisition system that adopts smart antennas and a cell averaging constant false alarm rate (CA-CFAR) processor to achieve reliable PN code acquisition in the presence of fading and interference. Hence, the decision threshold is adjusted according to the varying environment in order to improve the detection performance. The performance of the proposed system has been assessed theoretically by deriving closed form expressions for the probability of detection and probability of false alarm. The mean acquisition time is also obtained, and simulation results have been presented to verify the derived theoretical analysis.