GNSS-R延迟映射接收机相关器设计  

Design of Correlator of GNSS-R Delay Mapping Receiver

作　　者：杨东凯[1] 刘宪阳[1] 李伟强[1] 

机构地区：[1]北京航空航天大学电子信息工程学院,100083

出　　处：《遥测遥控》2008年第6期17-21,共5页Journal of Telemetry,Tracking and Command

基　　金：国家863计划资助项目(2007AA12Z340);国家863计划资助项目(2006AA09Z137)

摘　　要：介绍基于Altera公司EP2S60 FPGA芯片的GNSS-R接收机相关器的设计与实现。根据反射信号的接收处理特点,相关器中反射通道在镜面反射点配置信息基础上滑动一定范围的码片数以及多普勒频移,以得到反射信号时延/多普勒二维相关功率。此外还重点介绍NCO模块、EMIF接口模块。试验结果表明本地码、载波生成准确,在DSP配置下相关器可正确得到反射信号相关功率。This paper describes the design and implementation of correlator of GNSS-R delay mapping receiver.According to the receiving and processing characteristics of reflection signals,the delay/Doppler two-dimensional power of reflection signals is computed by slewing a range of chips and Doppler frequency shift on the basis of the mirror reflection point information in the reflec- tion channels.Furthermore,the NCO and the EMIF interface with DSP are also introduced.The test result indicates that the local code and carrier are generated exactly and the correlator can get the power of reflection signals under the configuration of DSP.

关 键 词：全球导航卫星系统 反射信号 FPGA 相关器 

分 类 号：P228.4[天文地球—大地测量学与测量工程]