| 近程PRC-CW雷达扩展多普勒容限方法研究 |
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| 引用本文： | 赵兆,是湘全,王志华.近程PRC-CW雷达扩展多普勒容限方法研究[J].南京理工大学学报(自然科学版),2009,33(3). |
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| 作者姓名： | 赵兆 是湘全 王志华 |
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| 作者单位： | 南京理工大学,电子工程与光电技术学院,江苏,南京,210094 |
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| 摘 要： | 针对伪码调相连续波(PRC-CW)雷达信号的多普勒敏感性,提出了一种扩展多普勒容限的新方法.该方法将单频脉冲信号和伪码调相信号结合起来,采用两种波形交替发射,在利用插值快速傅里叶变换方法得到各目标对应多普勒频率的基础上,构造相应的多普勒补偿后的信号再进入距离波门进行脉压-快速傅里叶变换处理,消除了原有的多普勒容限的影响,使该体制雷达可以应用于近程高速目标的搜索和跟踪,多普勒频率估计方差接近单频回波时段的Cramer-Rao下限.
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| 关 键 词： | 雷达 多普勒测量 容限扩展 伪随机码 脉冲压缩 插值快速傅里叶变换 目标 |
Doppler Tolerance Expansion of Short-range PRC-CW Radar |
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| ZHAO Zhao,SHI Xiang-quan,WANG Zhi-hua.Doppler Tolerance Expansion of Short-range PRC-CW Radar[J].Journal of Nanjing University of Science and Technology(Nature Science),2009,33(3). |
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| Authors: | ZHAO Zhao SHI Xiang-quan WANG Zhi-hua |
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| Institution: | School of Electronic Engineering and Optoelectonic Technology;NUST;Nanjing 210094;China |
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| Abstract: | A novel method to expand the Doppler tolerance is presented to suppress the Doppler sensitivity of the pseudo random code continuous wave(PRC-CW) radar signal.It utilizes a composite signal which is a cascade of single frequency pulse and pseudo random phase-coded signal.The Doppler frequencies of targets are firstly estimated based on interpolated fast Fourier transform method and the Doppler compensated signal is constructed.The effect of Doppler frequency on the correlation detection can be efficiently s... |
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| Keywords: | radars Doppler measurement tolerance expansion pseudo random code pulse compression interpolated fast Fourier transform targets |
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