基于宽窄带微多普勒融合的锥体目标三维重构

目标三维特征包含更为精细的结构和微动信息,以锥体弹头为研究对象,提出了一种基于宽、窄带混合体制雷达组网的锥体目标三维重构方法。首先建立锥体目标进动模型,详细分析了目标在不同体制雷达回波中的微多普勒调制特性,然后,使用改进的viterbi算法和最小二乘法对各散射中心的幅相信息进行提取和估计,并通过灰色关联度分析实现非理想散射中心的匹配。在此基础上,构建宽、窄带微多普勒信息融合方程组,解算出锥体目标的进动和结构参数,进而确定目标空间位置,实现三维重构。仿真结果表明,在信噪比为5dB情况下,目标的三维重构精度在91%左右。

A Three-Dimensional Reconstruction Method of Cone Targets Based on Micro-Doppler Fusion of Wideband and Narrowband Netted Radars

Three-dimensional features of targets include delicate structure and micro-motion information. Taking cone shaped warhead as an object of study, this paper proposes a three-dimensional reconstruction method of cone targets based on the mixed netted radars consisting of both narrowband and wideband ones. Firstly a procession model of cone-shaped target is established, and the micro Doppler modulation characteristic is analyzed for radar echo in different radar systems. Then the paper, by using the improved algorithm and the least-square theory, extracts and estimates the amplitude and phase information of each scattering center. The gray cognate analysis method is used to correlate those corresponding non-ideal scattering centers. Thirdly, the amplitude and phase information fusion equations in different radar systems are set. Based on the equations, procession parameters and configuration parameters of cone target are calculated to identify the position parameters and realize the three-dimensional reconstruction. The simulation results show that the precision of three-dimensional reconstruction is at about 91% when the signal noise ratio (SNR) is under condition of 5dB.