基于Toeplitz矩阵的电离层相位扰动校正方法  

Approach to correct ionospheric phase perturbation based on Toeplitz matrix

作　　者：赵志国[1,2] 肖卉[1] 

机构地区：[1]空军预警学院空天预警装备系 [2]中国人民解放军93534部队

出　　处：《系统工程与电子技术》2017年第5期1024-1029,共6页Systems Engineering and Electronics

基　　金：国家自然科学基金(51309232)资助课题

摘　　要：大幅度电离层相位扰动使得超视距雷达(over the horizon radar,OTHR)多普勒频谱严重展宽,限制了OTHR系统在船舶目标探测方面的实际应用。针对这一问题,根据邻近方位-距离单元数据协方差矩阵的Toeplitz矩阵特性,估计电离层相位扰动的变化函数,提出一种无需提取标校信号的电离层相位扰动校正方法。仿真实验及分析表明,该方法能有效改善OTHR系统在大幅度电离层相位扰动背景下对船舶目标的检测性能。The large ionospheric phase perturbation, leading to serious Doppler spectrum spread in over the horizon radars （OTHR） , restricts the application of the OTHR system in ship targets detection. To resolve this problem, the phase evolving function is estimated based on the Toeplitz characteristic of covariance matrix of the data in the near range and azimuth units and an approach to correct ionospheric phase perturbation without fil-tering calibration signal is proposed. Simulation results and analysis show that it is effective in improving the performance of the OTHR system for ship targets detection.

关 键 词：超视距雷达 电离层相位扰动 TOEPLITZ矩阵 船舶目标 

分 类 号：TN958.93[电子电信—信号与信息处理]