GPS接收机中伪随机码快速捕获技术的研究  

Study on Technique of Fast Acquisition Pseudo Noise Code in GPS Receiver

作　　者：薛文芳[1] 邵定蓉[1] 李署坚[1] 

机构地区：[1]北京航空航天大学电子工程系

出　　处：《北京航空航天大学学报》2003年第6期489-492,共4页Journal of Beijing University of Aeronautics and Astronautics

摘　　要：为缩短GPS接收机捕获伪随机码的时间 ,分析了与时域滑动相关的常规捕获方法 ;利用有效星历所提供的先验信息 ,对伪随机码的搜索范围进行压缩 ,缩短了伪随机码失锁重捕的时间 ;分析了采用FFT的快速捕获技术 .In order to reduce the time of acquisition pseudo noise code in GPS receiver, the conventional acquisition method slide correlation in the time domain was analyzed. The searching range of pseudo noise code was narrowed utilizing to the information provided by epicheirema. The lost reacquisition time was shortened. The fast acquisition technique using FFT was analyzed. Simulation shows that the acquisition speed can be improved obviously.

关 键 词：快速变换 频域分析 相关 多通道 全球定位系统 

分 类 号：V241.624[航空宇航科学与技术—飞行器设计]