Impact of jamming excisor on the tracking loops for GPS receivers

摘要

It is well known that the narrowband interference (NBI) has severely degraded the quality of the received GPS signal and even demolish the operation of GPS receivers. Therefore, we propose using a frequency domain approach to excise NBIs for GPS receivers. Furthermore, we numerically analysis the impact of our proposed jamming excisor on the tracking loops for GPS receivers. Finally, we compare the approach in this thesis with one related previous work. Our method can handle more than two times the number of interference and at most eight jamming signals with jamming-to-signal ratio (JSR) of 25 dB. In this case, the anti-jamming filter does not affect the acquisition of C/A code phase and the resulting detection probability is over 90%; the resulting tracking errors are 10 chips, 0.5 Hz, and 0.20 degrees, with respect to the code phase, carrier frequency, and carrier phase.