Description: 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 and
power quality enhancement are presented. The proposed scheme
can be applied for signal analysis both under stationary and nonstationary
conditions. Based on digital time-domain simulations,
applications of the filter for a) sinusoidal waveform peak detection,
b) harmonic identification/detection, c) detection/extraction
of individual components of a signal, d) instantaneous reactive
current extraction, e) disturbance detection, f) noise reduction in
zero-crossings detection, and g) amplitude (phase) demodulation
for flicker estimation, are presented. Platform: |
Size: 153503 |
Author:yangyansky |
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Description: 单频干扰陷波器源码。自适应陷波器,与一般陷波器比较，有两大优点：（1）能够自适应地准确跟踪干扰频率。
（2）容易控制带宽.-Single-frequency notch filter interference source. Adaptive Notch Filter, Notch Filter with the general comparison, there are two main advantages: (1) can be adaptively tracking the exact frequency interference. (2) easy to control bandwidth. Platform: |
Size: 9216 |
Author:李强 |
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Description: 抑制单频干扰陷波器，没有解压密码，能够 自适应 检测单频干扰的存在 -Single-frequency interference suppression notch filter, there is no decompression password to adaptive testing the existence of single-frequency interference Platform: |
Size: 1024 |
Author:杨竟 |
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Description: 在自适应信号的理想输入为有正弦信号。噪声输入也为一正弦信号。它们相互迭加，再经过LMS自适应算法，再比较它们的结果。-In an ideal adaptive signal has sinusoidal input signal. Noise input for a sinusoidal signal. Their mutual superposition, and then after LMS adaptive algorithm, and then compare their results. Platform: |
Size: 2048 |
Author:闫丰 |
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Description: 利用自适应陷波器对引入单频干扰的原始正弦信号进行恢复-The use of adaptive notch filter for the introduction of single-frequency interference for the restoration of the original sinusoidal signal Platform: |
Size: 1024 |
Author:mengxiao |
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Description: 我的最佳优化的作业编写自适应的程序有自适应线谱增强器，凹口滤波器。-My best optimization of the operating procedures prepared by the adaptive adaptive line enhancer, notch filter. Platform: |
Size: 5120 |
Author:魏鑫 |
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Description: 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 filter), that we need to know precisely the frequency of sinusoidal interference. However, when the disturbance frequency is slow sinusoidal changes, and the frequency characteristics of the election request is very acute, is the best use of adaptive noise cancellation method. with a second-order FIR of the LMS adaptive filter to eliminate sinusoidal interference in a program. Platform: |
Size: 1024 |
Author:wangming |
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Description: 自适应滤波器在自适应数字陷波滤波器中的应用蒙特卡罗仿真掷骰子-One Monte-Carlo simulation program for the three small dice adaptive filter in the adaptive digital notch filter of Platform: |
Size: 2048 |
Author:哟哟 |
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Description: 利用自适应陷波器来消除通信系统中的工频干扰。重点从LMS算法的步长因子、信号与干扰的频率差、参考输入的幅值和相位等几个方面讨论单频陷波器的滤波效果。另外，还以双频为例，讨论了多频级联型陷波器的特性，证实了经过两次滤波后，信号可被真实的恢复出来，且误差收敛趋于稳定。-The use of adaptive notch filter to eliminate the communication system frequency interference. LMS algorithms focus from step factor, the frequency difference signal and interference, refer to the input amplitude and phase of discussions on several aspects of single-frequency notch filter of the filtering effect. In addition, in order to dual-band, for example, discussed the multi-frequency cascade notch filter characteristics, confirmed the filtered twice, the signal can be restored out of true, and the error convergence stable. Platform: |
Size: 4096 |
Author:刘翔 |
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Description: 用LMS算法实现对自适应谱线增强器的仿真，自适应谱线增强器与陷波器的基本原理-LMS algorithm with adaptive line enhancer of the simulation, adaptive line enhancer with the basic principles of notch filter Platform: |
Size: 1024 |
Author:pengxiaoqing |
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Description: 自适应陷波器理论经典论文，喜欢的同学可以下-Theory of classical adaptive notch filter paper, students can enjoy under the Platform: |
Size: 909312 |
Author:shen |
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Description: 该文档是自适应信号处理研究的一篇研究生毕业论文，介绍了自适应的几种常见算法，如LMS，NLMS等等，并在最后有相关的MATLAB程序（LMS程序 自适应滤波器，陷波器，分离器等程序）可以作为自适应信号处理初学者的参考资料-This document is an adaptive signal processing graduate thesis introduces several common adaptive algorithms, such as LMS, NLMS, etc., and the final program has an associated MATLAB (LMS process adaptive filter, notch , splitters and other procedures) can be used as a reference adaptive signal processing information for beginners Platform: |
Size: 3514368 |
Author:wanghaiyan |
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Description: 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)，并画出某次采样得到的波形；
4） 根据 2）中的公式，并利用 3）中产生的S(n)，在 1）中的误差性能曲面的等值曲线上叠加画出了采用最陡下降法以及LMS法时H(n)的在叠代过程中的轨迹曲线；
5）用MATLAB计算并画出了LMS法时误差随时间n的变化曲线（对应S(n)的某一次的一次实现）和e(n)波形；
6）在 1）中的误差性能曲面的等值曲线上，叠加画出采用LMS法得到的100次实验中的H(n)的平均值的轨迹曲线；
7）最终对结果进行了分析，具体见压缩包的word文档。
-Wideband signal in the conventional sinusoidal interference suppression method is the use notch filter (notch filter), this requires precise knowledge of the frequency of a sinusoidal interference . However, when the interference frequency sinusoidal changes slowly , and the selected frequency characteristic requirements are very sharp , then best use of adaptive noise cancellation method . following figure is a second-order FIR LMS adaptive filter to eliminate a program sinusoidal interference . The code implements the following functions:
A ) draw with MATLAB error performance of the filter surface and the surface contour error performance curve
2 ) gives the steepest descent method and the LMS algorithm formula
3 ) generated using MATLAB variance of 0.05 with a mean of 0 white noise S (n), and draw a particular sampling waveform
4 ) based on 2 ) of the formula , and use 3 ) generated in S (n), in a ) the error performance curves superimposed on the surface contour pl Platform: |
Size: 313344 |
Author:邵曈 |
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Search - notch adaptive filter