Active Jamming With Distirbuting-Coordination Against Air Defense Electronic Scanning Radars

In the21st century, radar plays a decisive role in the information war age. This thesis,which is a sub-task of some Research analyzes the active jamming based on having airdefense Electronic Scanning Radar information and completing networks of reconnaissancesensors, suppressing jamming sensors and deception jamming sensors, which has importanttheoretical significance and practical values.Cause the jamming measures must be accompanied by radar performance andanti-jamming measures, the performance of air defense Electronic Scanning Radar is limitedat first. Than the suppressing jamming, the plots deception jamming, thedistributing-coordination of track deception jamming is separately studied. The major work ofthis thesis includes1. For suppressing jamming, the accumulate detection probability is derived using targettrajectory path with earth curvature; The numbers and the power of suppressing jammingsensors are measured by random stochasticrandom and radar-jamming equation. Then theinfluence of radar wavform, jamming wavform, and radar receiver are equivalent to theinfluence factors in the radar equation. While the jamming wavform is noisefrequency-modulated signal, the impact of noise frequency-modulated index, noisevariance and bandwidth is studied with the mathematical mechanism; The moving targetindicator and moving target detection used in receiver is analyzed also. Ultra-low sidelobe is studied, when noise frequency-modulated signal is correlation and noncorrelation.At last the influence factors in radar-jamming equation are solved.2. For the plots deception jamming. Some interference parameters according to radar signaldetection are put forward, which are defined as jamming peak value loss, jamming peaktime, jamming noise ratio, jamming signal width ratio. Then using ambiguity function,the mathematical expression of these interference parameters are deduced usingshift-frequence rate, time delay rate, pulse width mismatched rate and linear frequencymodulation rate when the pulse width and linear frequency modulation are mismatched.Then the inter-ambiguity fuction of shift-frequence jamming to linear frequencymodulation with sidelobe suppression is studied. At last, the sidelobe cancellation byopen-loop is discussed, in suppressing jamming and plots deception jamming.3. For the distributing-coordination of track deception jamming, this study has made deepresearch on the methods of track deception jamming to electronic Scanning radar in acooperatively distributed way. Two methods for track deception jamming have beenproposed when the available information about the scanning rule of the radar is only itsscanning period. One is based on the guidance of a predefined expected track. The otheris based on random walking meeting with defined restrictions.