Research and Experiment on Dynamic Multi-agility Waveform of Radar in Anti-main-lobe Jamming

With the gamble of electronic warfare updating and the development of both modern radar system and electronic jammer, application of multi-domain agility waveform, especially Frequency-agile coherent (FAC) radar has been obtaining more attraction for its advantages in low probability of intercept. Therefore, research on waveform design of agile pattern among multi domain and its fast coherent signal processing are of great value for practical application, especially for defense radar which is faced with fatal main lobe jamming and strong clutters. In order to solve the issues above, a method on jamming detection and anti-jamming strategy decision is raised up first. Then, the method on phase-coherent accumulation by estimating the phase variation steer caused by frequency agility between inter-pulse is proposed. At the same time, establishment and use of adaptive clutter rejection weight is appended after target parameter searching, thus achieving the clutter suppression and target echo phase-coherent accumulation. The efficiency of the method above is demonstrated by both simulation and real field test in this paper, and the conclusion can be made that the method which runs through jamming environment perception, multi-agility waveform dispatching and coherent accumulation detection is significantly enhanced.