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FOURIER
IMAGE PROCESING FAST FOURIER TRANSFORM
- 2009-11-17 21:44:34下载
- 积分:1
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DSPII_USTC_01
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)
- 2013-11-06 13:12:36下载
- 积分:1
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param_motor
model of induction motor(parameters)
- 2009-09-08 05:03:19下载
- 积分:1
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f16_20100123
f16 uav 无人机f16文件 simulink 源码(f16 f16 uav UAV simulink source file)
- 2020-07-03 13:40:02下载
- 积分:1
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gistdescriptor
This code contain the gist descriptor in matlab
- 2013-04-08 07:53:21下载
- 积分:1
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am
说明: amplitude modulation in matlab
- 2011-11-22 08:15:26下载
- 积分:1
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MATLAB-time-frequency-analysis
《MATLAB时频分析技术及其应用》书中源程序代码(MATLAB time-frequency analysis of the source code of the technology and its applications, " the book)
- 2012-11-14 11:01:32下载
- 积分:1
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新建文本文档
copula函数 模型建立 相关性分析 模型拟合检验(Establishment of correlation analysis by copula function model)
- 2018-03-23 16:26:56下载
- 积分:1
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newton
programm for newton methode
- 2012-05-05 06:43:35下载
- 积分:1
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72146
The following Matlab project contains the source code and Matlab examples used for 2d wave equation. An interactive demo of the 2D wave equation
- 2015-03-20 20:55:43下载
- 积分:1