| 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。 |
| 关键词: 线性调频信号；脉冲压缩 超低旁瓣 |
| DOI： |
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| 基金项目: |
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| An LFM range compression method for extraordinarily-low range sidelobes |
| LI Tao |
| (Key Laboratory of Avionic Information System Technology,China Electronics Technology Group Corporation(CETC),Chengdu 610036，China) |
| 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. |
| Key words: linear frequency modulation(LFM) signal range compression low range sidelobe |
