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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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j4fft16
16点 基4-fft算法matlab实现(16:00 base 4-fft algorithm matlab)
- 2012-11-28 21:32:24下载
- 积分:1
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hu
说明: 两个序列的互相关函数的归一化运算。
先生成两个序列,再调用。(cross-correlation function)
- 2010-11-04 23:53:14下载
- 积分:1
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textInjecttest
A mex file to send text to any other application
- 2011-01-16 01:50:33下载
- 积分:1
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shuzhijifen
数值积分MATLAB代码,包含4种数值积分方法,分别为复化梯形、复化抛物线、梯形逐次分半、抛物线逐次分半。且编写采用向量化思维效率高、代码简洁。(Numerical integration MATLAB code, including four kinds of numerical integration methods are Trapezoidal, Compound Parabola trapezoid successive half parabolic successive half. And prepared to quantify the use of high-efficiency thinking, concise code.)
- 2021-02-23 21:59:40下载
- 积分:1
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svm1
一个有关支持向量机的matlab工具箱,内含支持向量机理论的简单介绍和matlab工具包(One on support vector machine matlab toolbox, including support vector machines and a brief description of the theory matlab toolkit)
- 2013-09-11 10:12:32下载
- 积分:1
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gibbs
使用MATLAB代码作图,观察Gibbs现象,可以改变参量,观察变化规律(Mapping using the MATLAB code to observe the Gibbs phenomenon, can change the parameters to observe the changes of)
- 2009-11-07 18:49:03下载
- 积分:1
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Goldbach
哥德巴赫猜想的算法思想以及算法的的具体实现以及试验数据(Goldbach Conjecture)
- 2009-02-21 16:52:11下载
- 积分:1
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FANSHUSHANG
求解加噪信号的范数熵,本程序是选取单载频信号求解其范数熵(Solving the norm of the signal plus noise entropy, the procedure is to select a single carrier frequency signal solving its norm entropy)
- 2013-07-29 21:03:35下载
- 积分:1
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CVPR09-best-paper
CVPR最佳论文,暗通道去雾。这里提供了一种实现方法的源代码。(CVPR09 best paper)
- 2011-08-04 11:47:52下载
- 积分:1