UWB radar target recognition based on time-domain bispectrum

Complex targets are irradiated by UWB radar, n ot only the mirror scattering echoes but also the multi-scattering interacting ec hoes are included in target echoes. These two echoes can not be distinguished by classical frequency spectrum and power spectrum. Time-domain bispectrum featur es of UWB radar signals that mingled with noise are analyzed, then processing th is kind of signal using the method of time-domain bispectrum is experimented. A t last, some UWB radar returns with different signal noise ratio are simulated u sing the method of time-domain bispectrum. Theoretical analysis and the results of simulation show that the method of extraction partial features of UWB radar targets based on time-domain bispectrum is good, and target classification and recognition can be implemented using those features.