基于积分多普勒平滑伪距的导航算法研究  

Research on Navigation Algorithm Based on Integral Doppler Smoothing Pseudorange

作　　者：金磊[1] 陈帅[1] 刘亚玲[1] 丁翠玲[1] 

机构地区：[1]南京理工大学自动化学院,南京210094

出　　处：《航天控制》2015年第1期61-65,共5页Aerospace Control

基　　金：国家自然科学基金委员会和中国工程物理研究院联合基金资助(U1330133);江苏省自然科学基金(BK20130774)

摘　　要：载体处于高动态机动、障碍遮挡、信号干扰和多路径等复杂环境时,GNSS接收机跟踪环路易发生信号失锁和相位失调,导致载波相位观测值发生较大变化,采用载波相位平滑伪距将严重影响导航精度。为改善GNSS接收机导航性能,对电离层效应及延时校正模型进行了研究,基于α-β滤波算法提出了基于积分多普勒平滑伪距的导航算法。实验结果表明:采用该算法在静态、动态条件下定位精度优于5m,测速精度优于0.05m/s,可显著提高GNSS接收机的导航精度。The locked signal or slip phase cycle can be lost in GNSS receiver＇ s tracking loop when the carrier is in complex environment, such as high dynamic, obstacles occlusion, signal interference, multipath and so on. It can lead carrier phase measuration to change frequently. In this condition, the pseudorange smoothed in the carrier phase can have a great impact on the navigation precision. In order to improve GNSS receiver＇ s navigation performance, the ionosphere effect and it＇ s time-delay correction models are studied in this paper. A navigation algorithm based on the integral doppler smoothing pseudorange is proposed, which is based on the α-β filtering algorithm. The experiment results show that the position precision is better than 5m and the velocity precision is better than 0. 05m/s in the static and dynamical condition. The GNSS receiver＇ s navigation precision and stability can be increased effectively by apply this algorithm, and the GNSS receiver＇s navigation performance is improved remarkably.

关 键 词：跟踪环路 载波相位 积分多普勒 平滑伪距 导航算法 

分 类 号：V249.3[航空宇航科学与技术—飞行器设计]