Research on SAR Anti-jamming Imaging Method with Sparse CP-OFDM
Synthetic Aperture Radar(SAR)is a microwave remote sensing imaging radar.In recent years,with the advancement of digital technology and radio frequency electronic technology,the jamming technology of SAR imaging is developed rapidly.The active jamming such as deception jamming based on Digital Radio Frequency Memory(DRFM)technology brings serious challenges to SAR imaging systems for civil use and military use.For research on SAR anti-jamming imaging against deception jamming,firstly,orthogonal waveform diversity design and waveform optimization is carried out for Orthogonal Frequency Division Multiplexing waveforms with Cyclic Prefixes(CP-OFDM).And the CP-OFDM wide band orthogonal waveform set with excellent autocorrelation peak sidelobe level and cross-correlation peak level is obtained.Then the sparse SAR imaging theory is introduced,which is combined with CP-OFDM.By using the sparse reconstruction method,the high-quality and high-precision imaging with anti-jamming capability is realized.Finally,simulation based on point targets,surface targets and real data is conducted,and it is proved that the method can completely remove the false targets generated by deception jamming,suppress sidelobes and achieve high-precision imaging.
SAR anti-jammingCyclic Prefixes based Orthogonal Frequency Division Multiplexing(CP-OFDM)waveform diversitySparse SAR imaging
万方数据
维普
