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This paper presents various applications of a nonlinear
adaptive notch filter which operates based on the concept
of an enhanced phase-locked loop (PLL). Applications of the filter
for online signal analysis for power systems protection, control a
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传统的宽带信号中抑制正弦干扰的方法是采用陷波器(notch filter),为此我们需要精确知道干扰正弦的频率.然而当干扰正弦频率是缓慢变化时,且选频率特性要求十分尖锐时,则最好采用自适应噪声抵消的方法.用一个二阶FIR的LMS自适应滤波器消除正弦干扰的一个方案。
-Wideband signals in the traditional sinusoidal interference suppression method is to use a notch filter (notch fil
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程序用来消除周期性噪声干扰信号。要求在图像频域中设计一Butterworth陷波器,其阶数n和陷波器半径D0由理论知识通过自己的探索得出,理解二者对滤波器性能的影响。-Procedures used to eliminate the periodic noise signal. Request images to design a Butterworth frequency domain notch filter, and its order n and the radius of notch
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两个频率的凹口滤波对消干扰噪声,效果很好。希望大家仿真实验。-Two frequency notch filter to eliminate interference noise, the effect is very good. I hope everyone simulation experiments.
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Abstract— with the latest advancements in electronics,
several techniques are used for removal of unwanted entities
from signals especially that are implied in the most
sophisticated applications. The removal of power line
interference from m
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传统的宽带信号中抑制正弦干扰的方法是采用陷波器(notch filter),为此需要精确知道干扰正弦的频率.然而当干扰正弦频率是缓慢变化时,且选频率特性要求十分尖锐时,则最好采用自适应噪声抵消的方法.下图是用一个二阶FIR的LMS自适应滤波器消除正弦干扰的一个方案。该代码实现了以下功能:
1) 借助MATLAB画出了滤波器的误差性能曲面和误差性能曲面的等值曲线;
2) 给出了最陡下降法以及LMS算法的计算公式;
3) 用MATLAB产生了方差为0.05, 均值为0白噪音S(n),并
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图像频域滤波,用matlab实现了在图像频域中通过Butterworth陷波器消除周期性噪声干扰信号。-Image frequency domain filtering using matlab achieved in the frequency domain image by Butterworth notch filter to eliminate periodic noise signal.
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第7章语音信号的减噪176
7.1自适应滤波器减噪176
7.1.1LMS算法基本原理176
7.1.2基本LMS自适应算法178
7.1.3LMS的自适应陷波器181
7.2谱减法减噪184
7.2.1基本谱减法184
7.2.2改进的谱减法187
7.3维纳滤波法减噪195
7.3.1维纳滤波的基本原理195
7.3.2维纳滤波减噪的具体步骤和函数WienerScalart96197
7.3.3维纳滤波的MATLAB例子1-Noise Chapte
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利用TMS320VC5509A为核心的DSP处理硬件,通过软件实现自适应Notch滤波和瞬时频率序列方差检测(VIRD)运算,在较低信噪比使用条件下完成对单频测距信号的可靠检测和判定-Using tms320vc5509a DSP core processing hardware, adaptive notch filter and variance of instantaneous frequency sequence detection (Vird) operation is realize
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notch filter is used to remove noise
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