ADAPTIVE ACQUISITION OF PN SEQUENCE IN NONFADING AWGN CHANNEL
Sabra Benkrinah, Mourad Barkat, M. Benslama, A. Benmeddour, R. Bekhakhecha · The African review of physics · 2009
In this paper, we consider an adaptive single dwell serial search system of pseudo-noise (PN) sequence s for direct sequences spread-spectrum (DS-SS) systems in no fading additive white Gaussian noise channels. Since the received signal levels in mobile communications are unknown and location varying, the acquisition schemes for pseudo-n oise (PN) sequences with fixed thresholds may cause too many false alarms. Therefore, adaptively varying thresh old schemes are proposed through the use of a constant false alarm rate (CFAR) algorithm. From the simulation results, w e observe that the DS/CDMA systems with CFAR processor outperforms the conventional scheme with fixed threshold.