Research of P-code Direct Acquisition Technology at Low Signal-to-Noise Rate in High Dynamic Condition
Zhan Ye · Journal of Astronautics · 2009
For solving the problem that P-code direct acquisition with low signal-to-noise rate in high dynamic environment|,the article provided a new P-code direct acquisition system that jointed non-coherent accumulate and FFT processing for part-correlation value based on matched filter.Firstly,realizable solution of acquisition system was given,and its principle was introduced.Subsequently,according to specific environment where navigation terminal worked,probability of detection and average acquisition time of acquisition system were deduced,and performance of acquisition system before applying non-coherent accumulate was compared with that after applying non-coherent accumulate.Research shows that the P-code direct acquisition system works effectively at low signal-to-noise rate in high dynamic environment.