| 基于伪码自相关特性与三次样条插值的GPS信号快速捕获算法 |
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| 引用本文： | 刘娣,薄煜明,吴盘龙.基于伪码自相关特性与三次样条插值的GPS信号快速捕获算法[J].信息与控制,2011,40(2). |
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| 作者姓名： | 刘娣 薄煜明 吴盘龙 |
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| 作者单位： | 南京理工大学自动化学院,江苏南京,210094 |
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| 摘 要： | 提出了一种新的基于伪码自相关特性和三次样条捅值拟合方法的GPS信号快速捕获算法.首先通过低频采样序列依据循环相关法求得C/A码相位粗略值;然后根据C/A码相位粗略值得到用于二次捕获的高频采样部分序列,利用伪码自相关特性求得精确C/A码相位值;最后利用三次样条插值法处理相关谱谱峰及邻近数据以进一步提高C/A码相位的测量精度.仿真结果表明该算法具有精度高、运算量小的优点.
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| 关 键 词： | 信号捕获 部分相关 三次样条 快速傅里叶变换 循环相关 |
GPS Signal Fast Acquisition Algorithm Based on PN Code Auto-correlation Property and Cubic-spline Interpolation Method |
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| LIU Di,BO Yuming,WU Panlong.GPS Signal Fast Acquisition Algorithm Based on PN Code Auto-correlation Property and Cubic-spline Interpolation Method[J].Information and Control,2011,40(2). |
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| Authors: | LIU Di BO Yuming WU Panlong |
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| Affiliation: | LIU Di,BO Yuming,WU Panlong (School of Automation,Nanjing University of Science and Technology,Nanjing 210094,China) |
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| Abstract: | Based on PN(pseudo noise) code auto-correlation property and cubic-spline interpolation fitting method,a new signal fast acquisition algorithm of GPS(golbal position system) is proposed.First,coarse C/A code phase is obtained by low-frequency sample sequence using circular correlation method.Then,based on coarse C/A code phase,partial high-frequency sample sequence for secondary acquisition is obtained.PN code auto-correlation property is used to get fine C/A code phase.Furthermore,cubic-spline interpolatio... |
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| Keywords: | signal acquisition partial correlation cubic-spline fast Fourier transform(FFT) circular correlation |
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