GPS/BD2/GALILEO反射信号接收机兼容分析与设计实现  

Design and Implementation of GPS/BD2/GALILEO Multi-Navigation System based on Compatibility Analysis

作　　者：秦瑾[1] 李伟强[1] 杨东凯[1] 

机构地区：[1]北京航空航天大学电子与信息工程学院,北京100191

出　　处：《全球定位系统》2012年第5期62-65,共4页Gnss World of China

基　　金：国家自然科学基金(批准号61171070)资助的课题

摘　　要：探讨了多系统反射信号接收机GNSS-R的关键技术,介绍了基于FPGA+DSP平台的GNSS-R接收机多系统兼容方法。通过数据插值技术、存储CA码发生器技术、FFT频域搜索CA码相位和载波多普勒频移技术,利用分段积分和FFT技术得到反射信号的复相关功率值等技术,解决了多系统在采样、捕获、跟踪、处理等方面的兼容性问题。搭建了验证系统,实现了对多系统反射信号接收机的信号的兼容处理。The key technologies of multisystem integrated GNSSR receiver is dis cussed. The method of multisystem GNSSR receivers is introduced, based on the platform of FPGA and DSP. Kinds of technologies, such as data extraction and interpolation, stored C/A code, the phase of CA code and the Doppler of carrier with FFT are searched, and seg ment correlation and FFT to acquire a serial crosscorrelation power of reflected signal and local CA code is used, etc. which the multisystem compatibility problem in sampling,acqui sition,tracking,processing and so on are solved,and a verification system to implement this system is constructed.

关 键 词：FPGA GPS BD2 GALILEO 兼容性 FFT 

分 类 号：P228.4[天文地球—大地测量学与测量工程]