基于DirectX的弹头进动3D视景及微多普勒特征仿真软件的实现

利用VC++6.0,基于短时傅里叶变换对弹头回波进行时频分析,得到弹头回波微动信息,利用兼容位图将回波微动信息进行可视化显示,采用DirectX三维显示技术,开发出弹头进动微多普勒特征分析及相应的弹头运动形态三维视景仿真软件。软件可提供弹头目标在不同雷达载频、自旋频率、锥旋频率、进动角等参数下的弹头理论微多普勒曲线,以及对回波时频分析得出的微多普勒曲线,实现了弹头目标三维视景与弹头微多普勒曲线的同步实时显示。软件运行表明:该软件运行流畅、理论推导结果与通过时频分析进行仿真验证的结果一致,软件对操作人员的响应迅速,三维视景显示与微动显示相一致。

Realization of Simulation Software about 3D Visual System Based on DirectX and Micro-Doppler Feature of Warhead's Procession

Micro-motion is one of the most significant characteristics that can distinguish warhead from decoys. A simulation software is built based on VC++6.0 in the paper, which can be used to analyze the warhead''s micro-Doppler feature and display three-dimensional, visual view of warhead with micro-motion. The software can acquire micro-motion information from warhead echoes by means of STFT,in the meanwhile, the 3D visual view is obtained by DirectX technique. The software can provide both theoretical and practical micro-Doppler feature curves of warhead which vary from different radar carrier frequencies, spinning frequencies, conning frequencies, precession angle, et al. The software works smoothly and responds quickly. The theoretical micro-Doppler curves are consistent with micro-Doppler curves of the echoes by time-frequency analysis method, and the 3D view scenes coincide with the micro-motion greatly in display.