Research of a Method of Direct Acquisition Based on P Code in Frequency Domain
Chengsheng Pan · Dianzi xuebao · 2007
As the typical CDMA application,the spread spectrum PRN codes in GPS are C/A code applied to standard positioning service and P code applied to precise positioning service presently.P code has a higher tolerance to jamming and spoofing compared with the C/A code,but P code is usually acquired depending on C/A code,so P code direct acquisition should be implemented which is meaningful for the development of our own satellite positioning system in the future.A new P code direct acquisition algorithm is proposed by studying signal direction acquisition algorithms and its validity is shown by a simulation experiment.The Results show that the new algorithm improves the acquisition efficiency.