SPACE-INTEGRATING ACOUSTOOPTIC PROCESSOR FOR RAPID GLOBAL POSITIONINGSYSTEM SIGNAL ACQUISITION

A space-integrating acousto-optic processor conceived for Global Posit ioning System (GPS) signal acquisition is presented. The main advantag e of the proposed system, as compared with traditional ones, is that o nly one parameter estimation, Doppler shift, is needed, instead of two . The GPS clear and acquisition (C/A) codes are matched to a paratellu rite Bragg cell in time-compression hardware with a compression factor of 20. This technique is further exploited for accelerating Doppler e stimation. Experimental results show an acquisition time of at most 1 ms.