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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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5files
It is matlab coding.The coding is useful
- 2014-02-06 12:24:16下载
- 积分:1
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GSTOOLS
遗传算法工具箱 希望高手指点 GATOOLS(Genetic Algorithm Toolbox hope you pointing)
- 2009-04-11 15:43:37下载
- 积分:1
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svorm
Pearson s correlation coefficient between two variables is defined as the covariance of the two variables divided by the product of their standard deviations
- 2010-12-23 19:01:34下载
- 积分:1
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dbf2800df370
包含MVC,GMV等的几种控制系统性能评估算法。还不错,分享一下(Generalized minimum variance control)
- 2013-12-21 22:52:00下载
- 积分:1
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freemarker-2.3.15.tar
关于freemarker的开发教程,并有很好的例子(About freemarker development tutorials, and have a good example)
- 2014-02-15 13:20:22下载
- 积分:1
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ASK
ASK调制解调,及在AWGN信道下的性能(ASK modulation and demodulation, and performance in AWGN channel)
- 2013-04-21 21:47:37下载
- 积分:1
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run_lms_mvdr
自适应滤波算法的MATLAB代码:run_lms_mvdr(Adaptive filtering algorithm MATLAB code: run_lms_mvdr)
- 2009-02-25 21:19:39下载
- 积分:1
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main
粒子群典型主程序 适合求取全局最优解 并且考虑失败情况 求均值代替(PSO typical main global optimal solution for strike)
- 2015-03-10 20:48:28下载
- 积分:1
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322211matlabxiaobobaoquzao
内含非常全面的matlab小波包去噪方法的实例,和多个可运行使用的程序,是学习小波去噪的非常有用的资料。(Contains a very comprehensive matlab wavelet packet denoising instance, and can run multiple programs to use, learn wavelet denoising very useful information.)
- 2014-07-20 17:00:30下载
- 积分:1