Multi-Dimensional Spread Target Detection with Across Range-Doppler Unit Phenomenon Based on Generalized Radon-Fourier Transform

Severe phenomena of across range-Doppler unit (ARDU) and decoherence occur when radar detects high-speed high-maneuvering targets, causing degradation in detection performance traditional FFT methods. The improvement resolution causes a multi-dimensional spread phenomenon, where different scattering centers the target are distributed on range units, along with motion parameters such as velocity acceleration. Unfortunately, current methods focus solely targets cannot handle spread, leading to significant decline performance. To overcome this problem, paper proposes several achieve high for ARDU phenomenon. Firstly, generalized likelihood ratio test (GLRT) is derived, energy integration Rayleigh Fourier transform (EI-GRFT) introduced improve cross-unit targets. Additionally, double-threshold based hybrid GRFT (DT-HGRFT) presented an enhancement EI-GRFT, enabling long-time slow time among multiple scatters by using HGRFT sliding detection, respectively. Furthermore, method joint detections DT-HGRFTs provided case number unknown. Finally, detailed theoretical analysis proposed presented, extensive simulations practical experiments demonstrate effectiveness