宽带信号辐射源径向加速度估计算法  

Radial acceleration estimation method of wideband signal emitter

作　　者：狄慧[1] 刘渝[1] 杨健[1] 

机构地区：[1]南京航空航天大学电子信息工程学院,江苏南京210016

出　　处：《系统工程与电子技术》2013年第4期707-712,共6页Systems Engineering and Electronics

基　　金：国家自然科学基金(61201208);江苏高校优势学科建设工程资助项目;南京航空航天大学基本科研业务费专项科研项目(NN2012068)资助课题

摘　　要：提出了一种利用相参脉冲串信号估计脉冲重复周期变化率的宽带信号辐射源径向加速度估计方法。为了解决电子侦察接收机采样间隔与辐射源脉冲重复周期不匹配造成的脉冲边沿到达时间(time of arrival,TOA)估计偏差问题,采用了分数时延估计算法对脉冲间时延进行估计。获得精确的脉冲TOA后用最小二乘法提取径向加速度信息。给出了该方法目标径向加速度估计所能达到的误差下限,仿真结果接近该下限,具有很高的精度。本算法适用于线性调频和非线性调频等宽带信号。A radial acceleration estimation method based on the rate oi change of pulse perlocl estlmauon with coherent pulse train is proposed. In order to solve misjudgment of pulse edage caused by mismatch between electronic reconnaissance receiver sampling interval and pulse repeat interval, a subsample time delay estimation algorithm is used to estimate the time delay between pulses. The least square method is used to extract radial acceleration from accurate time of arrival （TOA） estimates. The radial acceleration estimation error lower bound of the proposed method is derived. The simulation results show that the performance of radial acceleration estimation is excellent and close to the error lower band. The proposed algorithm is suitable for wideband signals such as linear frequency modulation signal and non-linear frequency modulation signal.

关 键 词：径向加速度估计 到达时间估计 最小二乘 相参脉冲串 

分 类 号：TN911[电子电信—通信与信息系统]