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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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PI_VSI_PMSM
用电压电流双闭环控制电机的matlab模型,自己动手建的(With voltage and current double-loop motor control matlab model built yourself)
- 2013-12-17 20:23:52下载
- 积分:1
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cp0202_2pam_ds
直接序列扩展频谱的源代码,用于产生直接序列,可进行现行的编码工作,用于无限通信中
(Direct sequence spread spectrum of the source code, used to produce direct-sequence, it can conduct the work of the existing coding for unlimited communication)
- 2008-03-15 10:46:55下载
- 积分:1
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Neural
说明: 一个基于遗传算法和MLP的例子 Generic Algorithm(one based on genetic algorithms and MLP example Generic Algorithm)
- 2006-03-26 15:30:30下载
- 积分:1
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colorAutoCorrelogram
Feature extraction for color images using Auto Color Correlogram
- 2015-04-27 05:04:44下载
- 积分:1
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GA
说明: matlab代码遗传算法解决背包问题,0-1整数规划问题(Genetic algorithm to solve knapsack problem, 01 integer programming problem)
- 2015-11-16 22:38:17下载
- 积分:1
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iEMG
对肌电信号进行简单的时频分析,包括RMS,肌电积分值,动态中值频率,近似熵,边际谱熵等(HHT Marginal Spectrum Entropy )
- 2016-09-27 21:26:59下载
- 积分:1
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ActivdeSet
ActivedeSet(起作用集法),这个是在二次规划中应用的(ActivedeSet)
- 2010-12-15 11:32:25下载
- 积分:1
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802.11b_PHY_DBPSK
this is matlab code about 802.11b PHY.DBPSK
- 2009-06-05 18:06:11下载
- 积分:1
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PV_Grid_System
bess pscad baterry pscad
- 2013-08-08 21:19:44下载
- 积分:1