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中文摘要：
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。
英文摘要：
PC- based software GPS receiver development is an important direction of GPS area which is based on the realtime 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.
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