基于宽窄带微多普勒融合的锥体目标三维重构

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

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。

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 scat- tering 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 cal- culated 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.