| 基于变换域方法抑制线性调频干扰的GPS接收机设计 |
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| 引用本文： | 谭文群,芦莉,侯友国.基于变换域方法抑制线性调频干扰的GPS接收机设计[J].全球定位系统,2012,37(3):45-48. |
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| 作者姓名： | 谭文群 芦莉 侯友国 |
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| 作者单位： | 南昌工程学院信息工程学院,江西南昌,330099 |
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| 基金项目： | 江西省2011年度科技厅科技支撑项目资助，江西省教育厅2012年度科技项目资助 |
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| 摘 要： | GPS接收机的信号通常很微弱,很容易受到有意或无意的干扰。对于线性调频干扰,在GPS接收机中很难用单一的时域或频域方法消除,因为线性调频干扰不同于一般的宽带或窄带干扰。另外线性调频干扰在变换域有不同于GPS C/A码的显著特征,基于此特点设计了一种在变换域抑制线性调频干扰的GPS接收机。分析了线性调频干扰在变换域的特征,仿真结果验证了这种设计方法的可行性。
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| 关 键 词： | GPS信号 LFM干扰 变换域 分数阶傅立叶变换 |
Design of a GPS Receiver for Suppressing Linear Frequency Modulation Interference based on the Transform Domain |
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| TAN Wenqun,LU Li,HOU Youguo.Design of a GPS Receiver for Suppressing Linear Frequency Modulation Interference based on the Transform Domain[J].Gnss World of China,2012,37(3):45-48. |
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| Authors: | TAN Wenqun LU Li HOU Youguo |
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| Institution: | (School of Information Engineering Nanchang Institute of Technology, Nanchang Jiangxi 330099, China) |
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| Abstract: | The GPS signals are usually very weak and easily interfered. Additionally, in the GPS signals, it is difficult to mitigate the linear frequency modulation （LFM） interfer- ences only in the time or frequency domain. The LFM interference is different from the nor- mal wideband and narrowband interferences. It has obvious time-frequency signature that is distinct from the GPS coarse/acquisition （C/A） spread spectrum code. In this paper, a new GPS receiver is proposed to mitigate the LFM interferences based on the fractional Fourier transform （FRFT） in the transform domain. The simulation results show that this method is valid. |
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| Keywords: | GPS signals LFM interferences transform domain fractional Fouriertransform |
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