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Matlab
说明: Matlab_FFT方法检测正弦波相位 (Matlab_FFT phase sine wave was detected)
- 2011-04-02 09:42:22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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load-flow-caculation-code
MATLAB中动态潮流及其电压电流等的计算程序(The caculation code of dynamic power flow in MATLAB)
- 2014-12-22 19:30:26下载
- 积分:1
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Dicom_Learner
Dicoum cours for beginner in medical imaging
- 2015-02-05 16:19:53下载
- 积分:1
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hashing
将图像提取gist向量,然后计算各向量之间的欧氏距离,进行比较。(Extracted gist vector image, and then calculate the Euclidean distance between vectors, for comparison.)
- 2010-07-17 18:01:25下载
- 积分:1
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Utilisation_de_Matlab_pour_l_etude_des_asservisse
Using Matlab for the study of control
- 2013-02-12 23:19:01下载
- 积分:1
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bayes_classifier
贝叶斯分类器 模式识别(电子工业出版社)源代码(Bayesian classifier ..........)
- 2013-12-29 10:37:43下载
- 积分:1
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Lagrange_fft
基于拉格朗日插值法的可变分数延时FIR滤波器设计(Lagrange interpolation method based on variable fractional delay FIR filter design)
- 2013-11-25 19:41:58下载
- 积分:1
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MATLABerweihuitu
第06讲 MATLAB绘二维图数字图像处理课件-matlab语言基础,很适合做图像如理入门使
用系列(Digital image processing based on matlab language
courseware), very suitable for image such as
introduction to use series)
- 2013-11-13 20:26:50下载
- 积分:1
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modeloQa
It is a simulation OFDM with CP. there are modulator, FFT/IFFT, channel AWGN.
- 2013-12-13 00:28:18下载
- 积分:1