| 分数傅里叶变换在GNSS信号捕获中的应用 |
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| 引用本文： | 陈乐文,刘杨,秦红磊.分数傅里叶变换在GNSS信号捕获中的应用[J].电子测量技术,2010,33(12):29-34. |
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| 作者姓名： | 陈乐文 刘杨 秦红磊 |
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| 作者单位： | 北京航空航天大学,电子信息工程学院,北京100091 |
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| 摘 要： | 首先给出了分数傅里叶变换的数学模型并分析其相关性质,在此基础上,将分数傅里叶变换用于BPSK调制的GPS信号和BOC调制的信号的捕获当中,分析捕获结果与分数傅里叶变换角度的关系,实验证明分数傅里叶变换的角度取较小值时,存在模糊问题,取较大值时能正确捕获。因此GNSS信号捕获过程中,可以采用分数傅里叶变换,无需进行频域搜索,从而节省捕获时间。
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| 关 键 词： | 分数傅里叶变换 BOC调制 GNSS信号捕获 |
GNSS signal acquisition using fractional fourier transform |
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| Chen Lewen,Liu Yang,Qin Honglei.GNSS signal acquisition using fractional fourier transform[J].Electronic Measurement Technology,2010,33(12):29-34. |
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| Authors: | Chen Lewen Liu Yang Qin Honglei |
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| Affiliation: | Chen Lewen Liu Yang Qin Honglei(School of Electronic and Information Engineering,Beihang University,Beijing 100091) |
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| Abstract: | The mathematical model of fractional Fourier fast transformation(FRFT) was analyzed and applied in BPSK modulated GPS signal and BOC modulated navigation signals.Relationship between acquisition results and transforming angles of FRFT has been discussed theoretically and experimentally.It is proved that small transforming angles will lead to ambiguity problem,while larger transforming angles perform effectively.Conclusion was drawn that FRFT in acquisition can avoid frequency searching work,therefore acquis... |
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| Keywords: | fractional fourier transform BOC modulation GNSS signal acquisition |
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