Adaptive PN code acquisition in multi-path spread spectrum communications using FPGA

In multi-path spread spectrum communications, signals from different paths may affect the performance of the Pseudo-Noise (PN) code detectors. In this paper, the performances of two PN code detectors, Cell Averaging Constant False Alarm Rate (CA-CFAR) and Order Statistics CFAR (OS-CFAR) are analysed anti compared in terms of the Mean Acquisition Time (MAT) and Probability of detection (P-D). The detectors utilise a diaital Matched Filter (MF). Complexity and hard-ware consumption with Field Programmable Gate Array (FPGA) implementation are taken into comparison to determine the CFAR detector with the best performance.