Sar Anti-Jamming Method Based on Optimization of Phase-Jittered LFM Signal

In view of the false target deception jamming based on digital radio frequency storage technology, mutually orthogonal waveforms between pulses can be used to suppress the jamming. This paper proposes a phase jitter optimization model based on the linear frequency modulation(LFM) signal. Theoretically, the phase jitter of the signal can be optimized from three degrees of freedom. This paper focuses on the simulation and verification of the disturbance amplitude factor. Firstly, the anti-jamming strategy and feasibility under certain conditions are discriminated. Then gives the form of the phase-jittered LFM signal and its optimization model. Finally, the simulation verifies the anti-jamming effect and imaging performance. The simulation results show that the imaging performance of the optimized phase-jittered LFM signal is significantly improved, and the active deception jamming can be suppressed.