ECCM Scheme against SMSP Interference Based on Interference Reconstruction

The smeared spectrum (SMSP) interference, as a self-protection deceptive interference, can form dense false targets at the receiver end, resulting in the failure of the radar target detection. However, the filtering methods have a large energy loss due to the coupling of the interference with the target. In this paper, an electronic counter-countermeasure scheme based on parameter estimation joint interference reconstruction is proposed to suppress the SMSP interference. Firstly, the frequency modulation slope of the interference sub-waveform is estimated by the autocorrelation operation. Then, a Pei-type discrete base dictionary is constructed to represent the SMSP interference in the fractional domain. Finally, the interference is reconstructed by the compressed sensing theory and subsequently subtracted from the echo signal. Simulation results show that the proposed method can accurately estimate the parameter and have a good interference suppression performance.