对流层散射双向时间比的多径抑制方法  

Multipath mitigation for Two Way Troposphere Time Transfer

作　　者：吴文溢 陈西宏[1] 刘少伟[1] 刘赞[1] 贺绍桐 

机构地区：[1]空军工程大学防空反导学院,陕西西安710051

出　　处：《探测与控制学报》2016年第2期93-97,共5页Journal of Detection & Control

基　　金：国家自然科学基金资助项目(61172169)

摘　　要：针对现有滤波算法在消除对流层散射双向时间比对多径误差时存在精度不高、稳定性和实时性差的问题,提出了对流层散射双向时间比对的多径抑制方法。该方法建立了对流层散射双向时间比对多径效应模型,分析了不同波束宽度和不同基线距离下多径效应对时间同步精度的影响,采用卡尔曼滤波算法抑制多径效应带来的噪声误差。通过对流层散射试验表明,滤波后的钟差稳定性提高了一个数量级、精度提高了约5%,验证了该方法良好的多径抑制效果。Aiming at the poor performance in eliminating the multipath error of two way troposphere time transfer,a new multipath mitigation method was proposed.The model of Multipath effect of two way troposphere time transfer was established.Multipath effect under different distance and beam width resulted from multipath on the clock errors acquired by synchronization system was analyzed.An arithmetic based on kalman filter was used to mitigate the noise error resulted from the multipath.The result of the experimental showed that the stability of new method was improved one orders of magnitude,and the accuracy of new method was improved about 5percent.The proposed method is proved to be effective.

关 键 词：对流层散射 时间同步 多径效应 卡尔曼滤波 

分 类 号：TP228[自动化与计算机技术—检测技术与自动化装置]