GPS L1C导航信号PMF+FFT捕获算法研究与实现  

PMF + FFT Acquisition Algorithm Research and Realization of GPS L1C Navigation Signal

作　　者：王锋[1] 韩俊博[1] 焦国太[1] 耿生群[2] 

机构地区：[1]中北大学机电工程学院,太原030051 [2]北京航空航天大学电子信息工程学院,北京100191

出　　处：《弹箭与制导学报》2013年第4期61-62,66,共3页Journal of Projectiles,Rockets,Missiles and Guidance

摘　　要：针对GPS L1C信号的频段特点,文中介绍了一种改进的匹配滤波器和FFT相结合的捕获方法。该方法有效结合了串行捕获与并行捕获的优点,在减少硬件资源的同时实现了信号的快速捕获,且在MATLAB平台上实现了伪码捕获的仿真及算法性能分析。该方法能提高导航系统在复杂环境下的抗干扰能力,为特殊环境下信号伪码捕获提供参考,可用于新型的导航信号接收平台的设计中。The improved capture method combined by matched filter and FFT is introduced, aiming at the frequency range of GPS L1C signal. This method effectively combines the advantages of serial capture and parallel acquisition, which can decrease the hardware resources and realize the rapid capture of the signals, PN code acquisition simulation and algorithm analyses can be realized on the platform of MATLAB. Hardware implementation and time sequence simulation can be done by FPGA. This method can increase the anti-interference of the navigation system in the complex environment, supply the reference for the PN code acquisition in the special environment and it can be used in the receiving platform design of the new-type navigation signals.

关 键 词：卫星导航 PMF 捕获 匹配滤波器 

分 类 号：V249.328[航空宇航科学与技术—飞行器设计]