Abstract:

The correlation function of the C/A code global positioning system (GPS) signal is derived through spatial and spacetime adaptive processing respectively. The effect of array signal processing techniques on the signal acquisition for C/A code GPS is analyzed. Theoretical results show that the spatial adaptive processing has no effect on the signal acquisition, and the spacetime adaptive processing arises distortion while supressing interference, which degrade the synchronization and code tracking performance. In order to mitigate the distortion induced by the spacetime adaptive processing, a Wiener filter is adopted to compensate the distorted correlation function. Simulation results show that, after compensating the correlation function, the resulting waveform is well corrected and the distortion of signals is also corrected effectively.