高动态环境下GPS信号处理与分析  

High-dynamic GPS Signal processing and analysis

作　　者：朱江华[1] 鲍其莲[1] 

机构地区：[1]上海交通大学仪器科学与工程系,上海200240

出　　处：《电子测量技术》2011年第1期31-34,共4页Electronic Measurement Technology

摘　　要：为了研究如何消除高动态环境下多普勒频移对GPS信号的影响,首先根据多普勒频移,中频信号频率,载噪比等参数建立高动态GPS中频信号数学模型,得出一个高动态中频信号。然后,根据模拟的中频信号,分析载体的高动态运动对捕获和跟踪造成的影响,结合跟踪环的工作原理和数学模型,设计一个环路噪声带宽随多普勒频移可变化的跟踪环路,得到了理想的跟踪结果。证明该方法能够有效的消除多普勒频移对GPS信号的影响,具有很好的实用性。A GPS intermermediate frequency（IF） signal mathematical model was upbuilded at the beginning of the paper,and using this model we can generate an authenticity and reliablity signal.Then the signal is used as the data source of the acquisition and tracking to seek the relationship between noise bandwidth and doppler frequence shift.At the tailer part of the paper,A simulation verifies the relationship.So this method is very useful for the GPS signal tracking.

关 键 词：高动态 中频信号 多普勒频移 噪声带宽 

分 类 号：TN976.1[电子电信—信号与信息处理]