Bistatic Sar Jamming Methods And Characteristics

Bistatic synthetic aperture radar (Bistatic SAR) is a new radar system.lt uses separated transmitter and receiver flying on different platforms, which different from single SAR in the system structure.lt obtains richer information and plays an increasingly prominent role in modern military wars.The receiver of Bistatic SAR just receives signals and it’s difficult to find the position, therefore the system has a strong ability of anti-interference. At present, Bistatic SAR jamming technology is still in the initial stage, therefore the research on Bistatic SAR jamming has important theoretical and applied value.The dissertation analyzes the differences between Bistatic SAR and single SAR in geometeic model, distance course and the properties of Doppler, resolutions and target scattering. The differences cause the different interference pattern. According to the Bistatic SAR imaging model, the interference pattern of barrage jamming, deceptive jamming and rebound jamming are researched.For the hidden feature of receiver, this paper analyzes the deceptive jamming to the Bi-SAR with non-precision positioning receiver. Form the reference function mismatch in azimuth compression causing defocusing phenomena to proceed, the defocus issue of deceptive jamming is in-depth studies with non-precision positioning receiver. Through theoretical analysis, it can ascertain the scope of the permission settings and generate the deceptive jamming signals under the condition of tolerable defocus.As the false target is fixed in the traditional rebound jamming, the paper improved the rebound jamming, and it can obtain false targets in different distances without changing the jammer position. The paper also analyzes the area of targets witch can obtain false image jamming under the condition of tolerable defocus. The relationship between the receiver and the area is also studied. The simulation results confirm the validity of the analysis.