| 基于基2-FFT的GPS信号捕获算法研究 |
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| 引用本文： | 李欣,周辉,刘峰,龙腾.基于基2-FFT的GPS信号捕获算法研究[J].微计算机信息,2010(7). |
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| 作者姓名： | 李欣 周辉 刘峰 龙腾 |
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| 作者单位： | 北京理工大学雷达技术研究所;总参测绘局; |
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| 摘 要： | 讨论了各种GPS信号捕获算法,针对采用圆周相关法进行GPS信号捕获中FFT点数为非2的整数次幂的问题,分析了传统补零法和内插法的缺陷,并提出了一种新的基2-FFT捕获算法,该算法通过将采样数据和本地参考码均补零到大于自身长度两倍后做基2-FFT进行圆周相关,理论分析和仿真表明,该算法可以得到与非2的整数次幂点数的圆周相关一样的结果。
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| 关 键 词： | GPS 捕获 基2-FFT 圆周相关 |
Research on the GPS acquisition algorithm based on radix-2 FFT |
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| LI Xin ZHOU Hui LIU Feng LONG Teng.Research on the GPS acquisition algorithm based on radix-2 FFT[J].Control & Automation,2010(7). |
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| Authors: | LI Xin ZHOU Hui LIU Feng LONG Teng |
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| Abstract: | Several GPS acquisition algorithms are discussed,in order to solve the problem of the point of FFT is not the power of 2,the limitation of zero padded method and interpolation method are analysed,and a new acquisition algorithm based on radix-2 FFT is presented,circular correlation is accomplished using radix-2 FFT by padding zero to both sampled data and local reference code,and the new length is larger than the double of original length,from theoretical analysis and simulation,it is shown that the result ... |
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| Keywords: | GPS Acquisition Radix-2 FFT Circular correlation |
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