Acquisition strategies of GNSS receiver

GNSS receiver performs many important operations out of which acquisition has the great importance. The performance of GNSS receiver is strongly influenced by the acquisition time. Acquisition provides rough estimate of code delay and Doppler frequency values of the received signal which plays very important role to synchronize local code with the received one. GNSS receiver effectiveness is usually the measure of the mean acquisition time. Simulation shows that time domain acquisition using serial search method requires very large acquisition time compared to parallel acquisition in time or frequency domain. Consequently, serial acquisition strategy is a straightforward process that provide better resolution and can be easily implemented on hardware GPS receivers.