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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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MATLAB
MATLAB编程入门书籍,很丰富的内容和函数查询(Getting Started with MATLAB programming books)
- 2011-05-27 21:19:51下载
- 积分:1
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The-BP-neural-network
Matlab的编程例题,关于BP神经网络的PID温度控制(Matlab programming examples on BP neural network PID temperature control)
- 2013-10-12 14:11:23下载
- 积分:1
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mpc
通过将广义预测控制器转换成模型预测控制器的方法来达到广义预测控制的目的,对学习和使用gpc和mpc非常有用。(The generalized predictive controller converts the model predictive controller to achieve the purpose of generalized predictive control, very useful to learn and use gpc and mpc.)
- 2012-10-03 10:06:26下载
- 积分:1
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myspecgram
this code is used to find short time fourier transform
- 2010-11-16 21:14:47下载
- 积分:1
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DVHOP
matlab中实现DV-hop算法,无线传感网络定位算法中非测距的常用算法的简单仿真(matlab achieve DV-hop algorithm, wireless sensor network localization algorithm commonly used in Central Africa Ranging simple simulation algorithm)
- 2009-05-22 20:24:26下载
- 积分:1
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A_Non-Local
数字图像处理用非局部均值方法,其中仔细介绍了非局部均值的原理,用法(A Non Local Algorithm for Image Denoising)
- 2012-05-16 17:50:43下载
- 积分:1
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Step-by-Step-Procedure-of-ABC
ABCA algirithem step by step(algorithem of ABC)
- 2014-11-13 15:35:50下载
- 积分:1
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IShellOutputReceiver
Classes which implement this interface provide methods that deal with out from a remote shell command on a device/emulator.
- 2014-02-19 12:07:13下载
- 积分:1
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ICA
说明: 一个对数据进行独立成分分析的小程序,可对统计数据进行快速的降维。(An independent component analysis of the data of small procedures, statistical data on the fast dimension reduction.)
- 2011-03-05 17:15:14下载
- 积分:1