| 高动态GPS信号的捕获方法及性能 |
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| 引用本文： | 刘高辉,曹家昆. 高动态GPS信号的捕获方法及性能[J]. 计算机工程与应用, 2010, 46(7): 142-144. DOI: 10.3778/j.issn.1002-8331.2010.07.043 |
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| 作者姓名： | 刘高辉 曹家昆 |
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| 作者单位： | 西安理工大学 电子工程系，西安 710048 |
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| 摘 要： | 分析了基于分段匹配滤波器（PMF）-FFT实现高动态GPS信号捕获的子相关长度和FFT运算点数对捕获性能的影响，推导出多普勒频移捕获的范围和精度值，针对PMF-FFT捕获的多普勒频移分辨率低的缺点，提出了采用最小二乘法对幅频响应最大峰进行曲线拟合的方法来提高多普勒频率捕获精度的方案，最后对高动态GPS信号的捕获进行了仿真。结果表明：该方法可以很好地实现高动态GPS信号的快速精确捕获，并可以有效地缩短捕获时间和节省硬件资源。
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| 关 键 词： | 全球定位系统信号 高动态 分段匹配滤波器 捕获 |
| 收稿时间： | 2009-09-25 |
| 修稿时间： | 2009-11-16 |
Acquisition method and performance of high dynamic GPS signal |
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| LIU Gao-hui,CAO Jia-kun. Acquisition method and performance of high dynamic GPS signal[J]. Computer Engineering and Applications, 2010, 46(7): 142-144. DOI: 10.3778/j.issn.1002-8331.2010.07.043 |
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| Authors: | LIU Gao-hui CAO Jia-kun |
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| Affiliation: | Department of Electronic Engineering，Xi’an University of Technology，Xi’an 710048，China |
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| Abstract: | Based on PMF(Partial Matched Filer)-FFT achieving high dynamic GPS signal acquisition of the sub-correlation length and the FFT operation points on the captured performance is analyzed.The range and the value of accuracy of Doppler frequency shift are deduced.For the shortcomings of low-resolution of Doppler frequency shift acquired by PMF-FFT,a program using leastsquares method for maximum peak amplitude-frequency response curve fitting method to improve the acquired accuracy of Doppler frequency is propos... |
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| Keywords: | Global Positioning System(GPS) signal high dynamic partial matched filer acquisition |
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