一种基于数据跳变检测的高动态环境GPS信号参数估计方法  

GPS SIGNAL PARAMETERS ESTIMATION ALGORITHM BASED ON DATA TRANSITION DETECTION IN HIGH DYNAMIC CIRCUMSTANCES

作　　者：李小民[1] 刘晖[1] 郑利龙[1] 张其善[1] 

机构地区：[1]北京航空航天大学电子工程系202室,北京100083

出　　处：《航空学报》1999年第5期430-434,共5页Acta Aeronautica et Astronautica Sinica

基　　金：中国工程物理研究院科学技术基金

摘　　要：鉴于高动态环境中 Ｇ Ｐ Ｓ信号参数估计和调制数据跳变检测所遇到的问题，采用扩展卡尔曼滤波方法（ Ｅ Ｋ Ｆ）对信号参数进行了估计，分析了通过载波辅助技术实现伪码延时估计的原理，重点研究了一种简单的数据跳变检测和估计参数修正方法。模拟结果表明这种方法在信号参数估计精度和动态跟踪性能等方面都能够满足高动态环境的要求。The problems met in high dynamic circumstances during estimating GPS signal parameters and detecting data transition are analyzed. The signal parameters are estimated through extended Kalman filter (EKF) algorithm. The pseudonoise (PN) code tracking through digital delay\|locked loop (DDLL) and carrier assistant technology are discussed. And a simple data transition detection and parameter correction method is studied emphatically. The tracking performance and tracking error of the algorithm are analyzed through simulation. The simulation shows that this data transition method conduces to improve the parameters estimation precision, and the algorithm dynamic performance is ameliorated too.

关 键 词：参数估计 伪随机码 算法 GPS 高动态 信号检测 

分 类 号：P228[天文地球—大地测量学与测量工程] TN911.23[天文地球—测绘科学与技术]