Study Of Jamming And Anti-jamming Methods For Synthetic Aperture Radar

Synthetic Aperture Radar(SAR) has the ability of working in all-day andall-weather conditions. It can get high-resolution image in different frequency andploarization, which is of great importance in either civil and military fields.Firstly, the Range-Doppler algorithm of SAR are expounded.Then Range Timedomain Pulse Coherence and FFT-based SAR echo signal simulation algorithms arepresented in the dissertation on the basis of SAR scene and data model.The two echosignal simulation algorithms are verified feasible through analysing of the image.Secondly the geometry model of noise jamming,deception jamming and scatter-wavejamming are discussed.The jamming generated algorithm of deception jamming andscatter-wave jamming are presented and proved to be correct through simulation.Finally,several anti-jamming methods are described for the corresponding jammingmethods.The method of increasing the pulse repetition frequency can improved theoutput signal to interference ratio of noise jamming,the method of time-domain filteringcan remove narrowband periodic pulse jamming,the method of two-antenna cancellationcan eliminate the scatterer-wave jamming. Analysis and simulation verified thefeasibility of the anti-jamming methods given in dissertation.