| 模拟式自适应窄带滤波器 |
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| 引用本文： | 郑万照.模拟式自适应窄带滤波器[J].宇航学报,1988(4). |
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| 作者姓名： | 郑万照 |
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| 作者单位： | 南京电子设备研究所 |
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| 摘 要： | 模拟式自适应窄带带阻(或带通)滤波器其零点(或极点)由外部输入,它们与滤波器内部参数无关。在z平面上,自适应带阻滤波器便是二阶LMS算法自适应谐波对消器。实验表明,这种滤波器在大工频噪音中,提取语言信号,可提高20db信噪比。
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| 关 键 词： | 自适应滤波器 陷波滤波器 带阻滤波器 |
ADAPTIVE NOTCH FILTER WITH ANALOGUE DEVICES |
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| Zheng Wanzhao.ADAPTIVE NOTCH FILTER WITH ANALOGUE DEVICES[J].Journal of Astronautics,1988(4). |
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| Authors: | Zheng Wanzhao |
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| Institution: | Nanjing Institute of Electronic Equipment |
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| Abstract: | This paper describes an adaptive notch band elimination filter (or band pass filter) with analogue devices. The filter is characteristic of its zeros (or poles) injected from external harmonic source and independent from its parameters. In Z plane, the adaptive notch band elimination with anologue devices filter is proved to be second order LMS adaptive noise canceller. The experiment has shown that cancelling 50 Hz power-line interference in speech signals, it can increase 20 db noise rate of signal. |
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| Keywords: | Adaptive filter Notch filter Band rejection filter |
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