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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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064578
旋转机械的全息谱分析,欢迎大家查阅下载,很好的东西!(The rotating machinery holospectrum analysis, we welcome access to download a good thing!)
- 2012-11-24 20:57:48下载
- 积分:1
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Hand_Geometry_biometrics
The matlab code contains feature extraction of Hand goemetry in biometrics
- 2009-10-24 15:11:12下载
- 积分:1
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UltraWideBand
超宽带程序,应该对学习超宽带的朋友有用,希望能多交流(UWB procedures, the study should UWB useful friends hope more exchanges)
- 2007-04-21 19:41:23下载
- 积分:1
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Gold_sequence_generation
LTE的扰码产生序列,这个是matlab代码,十分详细。(LTE scrambling the sequence, this is the matlab code, very detailed.)
- 2011-07-14 20:41:12下载
- 积分:1
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sLBC
linear block codes using matlab
- 2015-01-13 17:37:51下载
- 积分:1
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APF
基于SIMULINK搭建的并联有源电力滤波器程序,希望大家,相互交流。(SIMULINK-based structures of Shunt Active Power Filter procedures, hope, each other.)
- 2010-05-31 00:52:51下载
- 积分:1
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xiaobo
一种基于小波变换的边缘检测Matlab源程序代码,对边缘检测方面的学习者很有帮助。(Based on wavelet transform edge detection Matlab source code for edge detection in learners helpful.)
- 2010-03-07 16:46:58下载
- 积分:1
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jiaquan
说明: 频域的模态参数识别方法之一,可以对振动信号进行分析处理,得出结构的固有频率,阻尼比,振型系数,方法很好,程序完整,(Frequency-domain modal parameter identification methods that can analyze the vibration signal processing, draw the structure of natural frequencies, damping ratio, mode shape coefficient, very good method, program integrity,)
- 2010-03-17 22:53:46下载
- 积分:1
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Tool-box-for-fuzzy
Fuzzy c means code for doing clustering.
- 2012-04-09 11:08:23下载
- 积分:1