高动态环境的GPS信号接收及其算法研究  

GPS signal receiving and its algorithms under high dynamic circumstances

作　　者：吕艳梅[1] 李小民[1] 孙江生 

机构地区：[1]军械工程学院光学与电子工程系,石家庄050003 [2]军械技术研究所,石家庄050003

出　　处：《电光与控制》2006年第4期24-27,45,共5页Electronics Optics & Control

基　　金：国家自然科学基金资助(F010103)

摘　　要：高动态环境存在较大的多普勒频移,这使得普通的GPS接收机在没有惯导辅助的情况下很难可靠工作。为了同时满足高动态GPS接收机动态性能和跟踪误差两方面的需要,本文提供了一种以DSP为核心的高动态GPS接收机设计方案,并对其各模块的功能进行了详细的解释说明。为了帮助DSP的设计,本文还研究了3种适应高动态环境的GPS信号参数估计算法,包括最大似然估计算法,卡尔曼滤波算法和频率扩展卡尔曼滤波算法。通过仿真,比较分析了这3种算法的估计精度和动态跟踪能力等性能,并对高动态GPS中的DSP实用化的设计方案进行了探讨分析。There is great Doppler frequency shift under high dynamic circumstances, thus the common GPS receiver cannot work reliably without the help of inertial navigation devices. To satisfy the requirements of the dynamic performance and also of the tracking accuracy during GPS signal receiving under high dynamic circumstances, we put forward a design scheme of GPS receiver for high dynamic circumstances, which focuses on DSP technique. The functions of each module are described in detail in this paper. We also studied the theory of three GPS signal parameter estimation algorithms adaptive to high dynamic circumstances, including MLE algorithm, Kalman filter algorithm, and FEKF algorithm. Through simulation, some performances of these algorithms are analyzed, including estimation precision, dynamically tracking ability etc.

关 键 词：高动态 GPS 接收机 参数估计 

分 类 号：V474.2[航空宇航科学与技术—飞行器设计] P228.4[天文地球—大地测量学与测量工程]