正负步进频率雷达的运动补偿新方法  

A New Method of Motion Compensation for Positive and Negative Stepped-frequency Radar

作　　者：张劲东[1] 顾陈[1] 李彧晟[1] 朱晓华[1] 

机构地区：[1]南京理工大学电子工程与光电技术学院,南京210094

出　　处：《现代雷达》2009年第2期36-39,共4页Modern Radar

摘　　要：针对低信噪比条件下的正负步进频率雷达运动参数估计问题,提出结合运用快速粗值估计和精确搜索估计的速度估计新方法。该方法利用相邻回波间相位关系作快速傅里叶变换得到运动速度的估值及搜索范围,同时采用具有良好抗噪性的脉组求和函数搜索得到精确速度。仿真结果表明,该方法具有抗噪性能好、估计精度高、运算量小和适合实时处理的特点。To solve the target motion parameter estimation problem for a positive and negative stepped-frequency radar under condition of low SNR, a new method of combined fast approximate estimation and accurate search estimation is proposed. In this method Fast Fourier Transformation （FFT） of the two successive echoes to obtain the estimation and searching range of the velocity is utilized first, then the accurate velocity with a pulse summation function is searched for. Simulation results show that this method has good anti-noise performance, high accuracy of estimation, small calculation load and is fit for real-time processing.

关 键 词：步进频率 运动补偿 脉组求和函数 

分 类 号：TN958[电子电信—信号与信息处理]