摘要
为了提高GPS软件接收机信号捕获的载波频率分辨率,在频域并行频率空间搜索捕获方法中,利用加大分析数据长度可以提高频率分辨率的优点,结合频域并行码空间搜索捕获方法,构成了一种混合搜索方法。仿真结果表明本方法在略微增加捕获时间的基础上提高了载波频率分辨率,保证了后续信号频率跟踪环节的准确性和快速性。
Frequency resolution can be advanced by adding the data length with parallel frequency space search acquisition method.In order to improve carrier frequency resolution of GPS software receiver,utilizing parallel frequency space search acquisition method and parallel code phase search acquisition method,a mix search acquisition method is put forward.Simulation results show that high carrier frequency resolution can be obtained with adding a little search acquisition time and the veracity and speed of next signal frequency tracking loop can be guaranteeed.
出处
《计算机工程与应用》
CSCD
北大核心
2008年第6期14-16,171,共4页
Computer Engineering and Applications
基金
国家重点基础研究发展规划(973)(the National Grand Fundamental Research 973 Program of Chinaunder Grant No.2007CB815500)。
关键词
GPS软件接收机
捕获
频率分辨率
GPS software receiver
acquisition
frequency resolution
