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基于PCI9820和GP2015的GPS信号采集与频谱分析
引用本文:纪元法,孙希延,施浒立,王晓岚.基于PCI9820和GP2015的GPS信号采集与频谱分析[J].现代电子技术,2008,31(21).
作者姓名:纪元法  孙希延  施浒立  王晓岚
作者单位:1. 中国科学院,国家天文台,北京,100012;桂林电子科技大学,应用科技学院,广西桂林,541004
2. 中国科学院,国家天文台,北京,100012
基金项目:国家重点基础研究发展计划(973计划)
摘    要:实时采集GPS信号,把数据存储在普通PC的硬盘上,利用PC丰富的软件资源进行软件接收机设计开发,是当前GPS接收机发展的一个重要方向.本文介绍了一种基于PCI总线的高速数据采集卡PCI9820的硬件结构及相关功能,基于它的双缓冲模式,实现对GP2015射频模块输出的中频GPS信号进行长时间采集,并论述了采样方案和信号频谱分析,实验结果表明,该数据采集系统可以实现连续GPS信号采集,为后续GPS基带信号处理奠定了基础.

关 键 词:PCI总线  数据采集卡  采样率  双缓冲

Study on PCI9820 and GP2015-based GPS Signal Sampling System and Frequency Spectrum Analysis
JI Yuanfa,SUN Xiyan,SHI Huli,WANG Xiaolan.Study on PCI9820 and GP2015-based GPS Signal Sampling System and Frequency Spectrum Analysis[J].Modern Electronic Technique,2008,31(21).
Authors:JI Yuanfa  SUN Xiyan  SHI Huli  WANG Xiaolan
Affiliation:JI Yuanfa1,2,SUN Xiyan 1,2,SHI Huli1,WANG Xiaolan1
Abstract:PC-based software GPS receiver development is an important direction of GPS area which is based on the real-time data recorded on hard disk of PC.In this paper,a PCI bus-based signal sampling device PCI9820 is presented.Based on its double-buffer mode,real-time GPS intermediate frequency data is sampled and recorded on PC.Signal sampling scenario and signal spectrum analysis are also given.Results show that continuous GPS signal is well recorded by the data sampling system for further base-band signal processing.
Keywords:GPS
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