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.
出处
《电子测量技术》
2011年第1期31-34,共4页
Electronic Measurement Technology
关键词
高动态
中频信号
多普勒频移
噪声带宽
high-dynamic
IF signal
doppler frequence
noise bandwidth
