卫星干扰源定位中四阶累积量时间差估计  

A TDOA estimation of fourth-order cumulant in satellite inference location

作　　者：金俊丽[1] 杨洁[2] 

机构地区：[1]淮海工学院东港学院,江苏连云港222069 [2]重庆大学机械工程学院,重庆400030

出　　处：《中国测试技术》2008年第1期56-59,共4页CHINA MEASUREMENT & TESTING TECHNOLOGY

基　　金：重庆市自然科学基金资助(CSTC,2007BB6106)

摘　　要：为了提高对影响卫星正常工作的地面干扰源进行定位的精度,提出卫星干扰源定位中四阶累积量时间差(TDOA)估计方法。该方法利用高阶累积量的特性,在低信噪比,非相关或相关噪声环境下,对接收信号到达时间差做出精确估计,从而有效提高卫星干扰源定位的精度。仿真结果验证该算法的准确性和有效性。In order to improve the positioning precision of interference source which affects the normal operation of the satellites, a Time-Delay of Arrival （TDOA） estimation method based on Fourth-order cumulant was discussed. With the characteristic of high order cumulant, the method can accurately estimate TDOA of the received signal under uncorrelated or correlated noise condition in low SNR and come out with more robust results. Simulation result proves its accuracy and efficiency.

关 键 词：卫星干扰源定位 到达时间差 四阶累积量 低信噪比 非相关与相关 

分 类 号：TN927.2[电子电信—通信与信息系统] TN929.53[电子电信—信息与通信工程]