Research of P-code Direct Acquisition Technology

The article provides a new design of P-code direct acquisition module based on segmented coherent accumulation at frequency domain. Firstly, realizable solution of acquisition system is given, and its principle is introduced. Subsequently, according to specific environment where navigation terminal works, probability of detection and average acquisition time of acquisition system are deduced. The conclusion is proved by simulation, and average acquisition time and probability of detection are analyzed in different condition. Research shows that the P-code direct acquisition module works effectively at low signal-to-noise rate in high dynamic environment.