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Detection of low-observable maneuvering target using high-order generalized Lv's distribution

Long-time integration is an effective way to strengthen the weak signal from low-observable target. However, the performances are affected by the range and Doppler migrations during the long observation time. In this paper, Doppler characteristics of a maneuvering target with high-order motion are studied and a novel transform, i.e., high-order generalized Lv's distribution (HGLVD), is proposed to realize the long-time coherent integration. The HGLVD can accurately and directly represent the m-D signal in the chirp rate and chirp change (CRCC) domain appearing as an obvious peak. The proposed method is simple for not introducing any nonphysical attributes such as transform angle or order. Experiment with CSIR radar data indicates that the proposed method can achieve higher integration gain and better clutter suppression ability.