Study Of Jamming To GPS Signal Modulated By BOC

GPS(Global Positioning System) is a navigation system which can time and measure distance by space across position technology. It can provide continuous real-time, high accuracy 3D position, 3D velocity and time information to customers around the world. With the application of GPS equipment in foreign military, the research on GPS signal jamming technology becomes more and more significant.Based on analyzing the futures of GPS signal, this thesis studies the modulation method to GPS signal, especially the features of the BOC modulation method. In this thesis, mathematical models are built to emulate GPS signal. It is proved that GPS signal with BOC modulation method has more capability of constricting multi-path effect, tracking targets and anti-jamming, compared with the signal with BPSK modulation method.This thesis builds the deception jamming and the barrage jamming models, aiming at studying the barrage jamming technology such as single tone jamming, multi-tone jamming, noise FM and noise AM,and the deception jamming technology,including repeater jamming technology. After model building and emulation of all the jamming technology, related curves of the jamming, SIR and BER are output in both time field and frequency field to assess the capability of all the jamming technology.