基于瞬时频率率的平动刚体目标微动参数测量  

Micro-Motion Parameter Measurement of Rigid Targets with Translation Based on Instantaneous Frequency Rate

作　　者：王才[1] 徐成发[1] 冯祺[1] 高梅国[1] WANG Cai XU Cheng-fa FENG Qi GAO Mei-guo(School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China)

机构地区：[1]北京理工大学信息与电子学院,北京100081

出　　处：《北京理工大学学报》2017年第3期318-324,共7页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(61401024);北京理工大学基础研究基金项目(20140542001)

摘　　要：为了估计具有二阶平动的刚体目标的微动参数,提出一种基于短时三次相位函数(CPF)和逆Radon变换(IRT)的参数测量方法.基于典型旋转微动模型,推导并分析初步平动补偿后微动散射中心的瞬时频率率(IFR);采用短时三次相位函数得到雷达回波的时间-瞬时频率率二维平面;基于时间-瞬时频率率二维平面,利用逆Radon变换对正弦曲线的测量原理实现平动补偿的速度误差、加速度误差以及微动参数的测量.仿真结果验证了该方法的有效性.In order to estimate the micro-motion parameters of rigid targets with second-order translation,aparameter measurement method based on short-time cubic phase function（CPF）and inverse Radon transform（IRT）was proposed.Based on the typical rotation micro-motion model,the instantaneous frequency rate（IFR）representation was first derived and analyzed after primary translation compensation.The short-time CPF was then used to obtain the twodimensional time-IFR plane of radar echoes.Finally,based on the two-dimensional time-IFR plane,the translation compensation velocity error,acceleration error and micro-motion parameters were measured by taking advantage of the sinusoid curve measuring principle based on IRT.The simulations validate the effectiveness of the proposed method.

关 键 词：微动 瞬时频率率 三次相位函数 逆Radon变换 

分 类 号：TN951[电子电信—信号与信息处理]