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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 and compared in terms of the Mean Acquisition Time (MAT) and Probability of Detection (P D). The detectors utilise a digital Matched Filter (MF). Complexity and hardware consumption with Field Programmable Gate Array (FPGA) implementation are taken into comparison to determine the CFAR detector with the best performance. I.

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