| 低信噪比损失的旁瓣抑制滤波器 |
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| 引用本文： | 张仕元,桂佑林. 低信噪比损失的旁瓣抑制滤波器[J]. 测控技术, 2009, 28(8) |
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| 作者姓名： | 张仕元 桂佑林 |
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| 作者单位： | 南京电子技术研究所,江苏,南京,210013;南京电子技术研究所,江苏,南京,210013 |
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| 摘 要： | 提出一种具有低信噪比损失的旁瓣抑制滤波器设计方法.常规的旁瓣抑制滤波器通常以峰值旁瓣最低为设计目标,未考虑信噪比损失的控制.本设计先给出了滤波器信噪比损失的表达式,在设计目标函数时考虑了信噪比损失,按加权失配滤波法得到显式的滤波器系数迭代关系式.该方法适用于二相码、多相码、LFM信号和NLFM信号.对于LFM信号,在信噪比损失相同(均为1.4 dB)的情况下,本方法所得滤波器较之常规的频域加窗法,峰值旁瓣低5 dB以上;而在峰值旁瓣电平相近的情况下,信噪比损失只有1 dB.
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| 关 键 词： | 旁瓣抑制 信噪比损失 加权失配滤波器 |
Side-Lobe Suppression Filter with Low Loss of Signal-Noise Ratio |
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| ZHANG Shi-yuan,GUI You-lin. Side-Lobe Suppression Filter with Low Loss of Signal-Noise Ratio[J]. Measurement & Control Technology, 2009, 28(8) |
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| Authors: | ZHANG Shi-yuan GUI You-lin |
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| Affiliation: | Nanjing Research Institute of Electronic Technology;Nanjing 210013;China |
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| Abstract: | A side-lobe suppression filter with low loss of signal-noise ratio is proposed.Normal sidelobe suppression filter is usually designed only to reduce the output side-lobe as low as possible,and the loss of signal-noise ratio is not specially considered.The expression of filter's loss of signal-noise ratio is presented firstly.Considering the signal-noise ratio,a method of using weighted mismatched filter iteratively to radar waveform such as binary code,multiple phase code,linear frequency modulated signal a... |
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| Keywords: | side-lobe suppression loss of signal-noise ratio weighted mismatched filter |
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