Analysis of Anti-interference Performance of GPS Receiver

Based on the analysis of tracks of code loop and carrier loop, GPS’s ability of anti-interference was related to ratio of power density from carrier to noise (C/N0), BW of Noise and time of detection integral beforehand (T). If C/N0 was increased, the noise would decrease, contrariwise noise will increase, and the noise will exceed the threshold, then the loop will be lost. Similar with carrier loop, tremble of DLL was related with C/N0, BW of Noise and T. If C/N0 was decreased, the tremble would increase, when the tremble exceed the threshold, the tracks of code loop would be lost.