Acquisition Circuit of Digital DS/BPSK Receiver Operating in Dynamic Situation

A digital DS/BPSK code acquisition circuit is proposed,and the mathematics model is derived when the receiver operates in high dynamic situation.The effect of Doppler frequency shift and PN phase error on the acquisition performance is analyzed.A scheme used to improve the probability of detection,and decrease the probability of false alarm is introduced.According to the analysis,the improved digital code acquisition circuit has higher probability of detection and lower probability of false alarm,and can be adopted for shortening the acquisition time effectively.