Hybrid Integration Segment Strategy for Fluctuating Target Based on Bistatic Radar

The echo of high-speed maneuvering targets is prone to the phenomenon of Across Range-Doppler units (ARDU) and fluctuations in echo amplitude and phase. Traditional processing algorithms sacrifice time and computing resources in exchange for integration performance, which is not conducive to engineering applications. This paper proposes a long-time hybrid integration strategy suitable for fluctuating targets. First, based on the bistatic radar scenario, the fluctuating target is modeled considering the motion errors. Then, the influencing factors of the segmentation strategy in long-time hybrid integration are analyzed. It is proposed that under the condition of known prior information of the target, the correlation time can be obtained by traversal search. Let the length of each segment be equal to the smaller of the correlation time and the maximum time without ARDU phenomenon, then the accumulation time can be divided into several sub-segments. The simulation results show that this method can effectively realize accumulation and significantly improve the detection performance, providing ideas for further research.