基于微动参数估计的非对称进动目标三维成像  

Three-dimensional imaging of precession targets with unsymmetrical appendixes based on micro-motion parameters estimation

作　　者：胡晓伟[1] 童宁宁[1] 何兴宇 江东[1] 王宇晨[1] 

机构地区：[1]空军工程大学防空反导学院,陕西西安710051

出　　处：《系统工程与电子技术》2016年第3期501-505,共5页Systems Engineering and Electronics

基　　金：国家自然科学基金(61372166);陕西省自然科学基础研究计划项目(2014JM8308)资助课题

摘　　要：具有非对称结构的进动目标成像是目前空间目标成像的一个难点。在构建非对称进动目标回波模型的基础上,分析了成像所需的4个微动参数并给出了相应的参数估计方法。在微动参数已知的前提下,提出了一种基于三维复数逆投影变换的进动目标三维成像的方法。首先利用微动参数构建相位补偿因子,之后对时间距离像进行三维搜索,进而实现进动目标的三维成像。最后通过仿真实验验证了所提方法的有效性,同时仿真分析了微动参数估计误差对成像的影响。Imaging of precession targets with unsymmetrical appendixes is a key challenge for spatial targets imaging at present.The echo model of precession targets with unsymmetrical appendixes is established.Based on that,4micro-Doppler parameters needed for imaging are analyzed,and the corresponding parameters estimating method is given.With the parameters,a 3-D imaging method for precession targets is proposed based on 3-D complex-valued back projection.Firstly,the phase compensation factor is structured with the parameters.Then a 3-D search is done in time-range profile,and the targets 3-D image is got afterwards.Finally,simulations verify the effectiveness of the proposed method,and analyze the influence of parameters estimating error to the imaging result.

关 键 词：非对称进动目标 微动参数估计 三维复数逆投影 三维成像 

分 类 号：TN957.51[电子电信—信号与信息处理]