| GPS软件接收机捕获算法的FPGA仿真 |
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| 引用本文： | 陈熙源,汤新华,祝雪芬.GPS软件接收机捕获算法的FPGA仿真[J].东南大学学报(自然科学版),2009(Z2). |
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| 作者姓名： | 陈熙源 汤新华 祝雪芬 |
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| 作者单位： | 东南大学微惯性仪表与先进导航技术教育部重点实验室;东南大学仪器科学与工程学院; |
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| 基金项目： | 江苏省“六大人才高峰”资助项目(2008143); 江苏省青蓝工程资助项目; 教育部新世纪人才支持计划项目(NCET-06-0462) |
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| 摘 要： | 探讨了GPS软件接收机的前端采集数据结构、C/A码捕获算法原理、Virtex2p开发板原理.为了能在FPGA(可编程门阵列)上实现GPS信号并行捕获算法,采用了补零计算来弥补算法中采样点不基于2N的不足,并且在Simulink环境下运用基于FPGA的应用软件SystemGenerator进行了补零后的并行捕获算法的FFT模块、虚数乘法模块、平方模块等搭建编程.同时采用了Matlab中的M文件将采样数据仿真成模拟信号导入完成仿真实验,并将仿真结果与Matlab结果进行了相应的比较和分析,得到与Matlab结果同样的捕获频率.虽由于补零引起小于1个码元(16个采样点)的采样点误差,但不影响捕获结果,证实了System Generator在FPGA实现捕获算法可行性.
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| 关 键 词： | GPS接收机 捕获算法 FPGA System Generator |
Simulation of acquisition algorithm for GPS software receiver based on FPGA |
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| Chen Xiyuan Tang Xinhua Zhu Xuefen.Simulation of acquisition algorithm for GPS software receiver based on FPGA[J].Journal of Southeast University(Natural Science Edition),2009(Z2). |
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| Authors: | Chen Xiyuan Tang Xinhua Zhu Xuefen |
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| Institution: | Chen Xiyuan Tang Xinhua Zhu Xuefen(Key Laboratory of Micro-Inertial Instrument , Advanced Navigation Technology of Ministry of Education,Southeast University,Nanjing 210096,China) (School of Instrument Science , Engineering,China) |
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| Abstract: | The sample data structure of the global position system(GPS) software receiver radio frequency(RF) front-end,the principle of the GPS C/A code acquisition algorithm,and the principle of Virtex2p are discussed.In order to implement the GPS parallel acquisition algorithm,the method of zero padding is used to overcome the limitation of data which is not based on 2N.Meanwhile,based on the Simulink environment,the software System Generator is used to set up the FFT module,the multiplier of imaginary number,the s... |
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| Keywords: | GPS receiver acquisition algorithm FPGA System Generator |
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