Radar Target Recognition Using Selective Resonance Excitation

Resonance-based radar target recognition is premised on the observation of natural resonant frequencies so that target discrimination and classification can occur. This implies the use of ultra-wideband (UWB) radar in order to excite a sufficiently wide range of target frequencies, however developing practical UWB radar systems is a significant challenge. Furthermore, due the relative weakness of the late-time resonant target response, it is often not possible to isolate the resonant frequencies under realistic noise conditions. To mitigate these limitations, this paper examines the feasibility of selective excitation of resonant frequencies using more traditional (narrow-to-medium band) excitation. Simulated target results are presented for which resonant frequencies are extracted, and the efficacy of selective excitation of these resonances is demonstrated.