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锥体进动特性是用于空间目标识别的重要依据之一.为了研究这一问题,提出一种基于广义S变换的空间锥体进动微多普勒特性分析方法.根据锥体进动的物理运动过程建立了相应的数学模型,推导出锥体进动微多普勒频率的理论表达式,并通过仿真结果验证其正确性.该模型采用共原点的目标多坐标体系,使其仅存在旋转关系,从而简化了模型的结构与计算复杂性.在此基础上,利用广义S变换实现了对模拟雷达进动回波的微多普勒特性分析.在不同信噪比条件下的仿真结果表明:该方法时频分辨性较好,而且具有较高的鲁棒性.
In order to study this problem, a pre-micro-Doppler property analysis method of precession of pyramidal cone based on generalized S-transform is proposed. According to the precession of cone The corresponding mathematical model is established in the process of physical movement, and the theoretical expression of micro-Doppler frequency of the precession is deduced, and its correctness is verified by the simulation results.The model uses the common origin of the target multi-coordinate system to make it exist only Rotation relationship, which simplifies the structure and computational complexity of the model.Based on this, the micro-Doppler characteristic analysis of the precession echo of the simulated radar is realized by using the generalized S-transform.The simulation results under different signal-to-noise ratios It shows that this method has better time-frequency resolution and higher robustness.