| 一种线性调频信号超低旁瓣脉冲压缩方法 |
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| 引用本文： | 李,涛.一种线性调频信号超低旁瓣脉冲压缩方法[J].国际商务研究,2018,58(5). |
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| 作者姓名： | 李 涛 |
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| 作者单位： | 中国电子科技集团公司航空电子信息系统技术重点实验室，成都610036 |
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| 摘 要： | 雷达脉冲压缩希望具有超低距离旁瓣的特征，线性调频信号采用加窗方式可达到约-35 dB的距离旁瓣电平。基于超低旁瓣电平信号设计方法，在不考虑信噪比损失条件下，提出了一种新的超低旁瓣的脉冲压缩方法，基本思想是针对给定线性调频信号，频率滤波权值采用超低频旁瓣频域信号与线性调频信号频域的比值，可以将接收端旁瓣电平输出最低到-120 dB。同时，从理论上和数值结果中分析了信噪比损失、延迟敏感性等问题。
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| 关 键 词： | 线性调频信号 脉冲压缩 超低旁瓣 |
An LFM range compression method for extraordinarily-low range sidelobes |
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| LI Tao.An LFM range compression method for extraordinarily-low range sidelobes[J].International Business Research,2018,58(5). |
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| Authors: | LI Tao |
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| Abstract: | A radar system desires low range sidelobes and Linear Frequency Modulated(LFM) waveforms can reach a -35 dB Peak Sidelobe Level(PSL) with a window in range compression. Based on a waveform design method for extraordinarily-low range sidelobes and ignorant of signal-to-noise ratio(SNR) loss,this paper proposes a novel range compression method for extraordinarily-low range sidelobes. The concept is to use a range compression weight as the ratio of the frequency domain signal to the LFM frequency domain,yielding a -120 dB sidelobe output. The SNR loss and sensitivity to delay are also analyzed according to theory and numerical simulations. |
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| Keywords: | linear frequency modulation(LFM) signal range compression low range sidelobe |
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