登录
首页 » matlab » DSPII_USTC_01

DSPII_USTC_01

于 2013-11-06 发布 文件大小:306KB
0 227
下载积分: 1 下载次数: 32

代码说明:

  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)

文件列表:

DSPII_USTC_实验一
.................\DSP.doc,455168,2013-11-06
.................\DSP.m,2869,2013-10-14

下载说明:请别用迅雷下载,失败请重下,重下不扣分!

发表评论

0 个回复

  • IllustrationMod
    mode shapes of a shaft supported by fluid film bearing(this codes gives a good method to calculate the mode shapes of a shaft supported by fluid film bearing)
    2009-05-29 13:58:32下载
    积分:1
  • MATLAB-classic-tutorials
    MATLAB经典教程,包括基础、矩阵、程序设计、绘图等几部分。(MATLAB classic tutorials, including the foundation, matrix, programming, graphics and other parts.)
    2011-01-25 10:29:40下载
    积分:1
  • transformation
    transformation of coordiantes using finite diff method
    2013-11-08 00:47:46下载
    积分:1
  • mfile
    匹配滤波器的源代码,可以实现信号生成的匹配滤波(The source code matched filter, can achieve the matched filter the signal generated)
    2021-04-28 16:58:44下载
    积分:1
  • OFDM_TRail
    OFDM系统,子载波数目1024,前缀数目256,循环数目256,加入了高斯白噪声(OFDM system, the number of subcarriers 1024, the number prefix 256, the cycle number of 256, by adding a Gaussian white noise)
    2009-04-10 19:39:09下载
    积分:1
  • timeanalysis
    说明:  用于结构在动力荷载作用下的时程分析,地震荷载,随即荷载均可,采用newmark方法。(time-domain analysis of a linear strucutre under dynamnic loads。 Newmark method is used.)
    2020-10-21 20:37:23下载
    积分:1
  • cyclic_auto
    基于循环统计量的Matlab程序,主要用于信号故障诊断(Circulation statistics based on Matlab program, mainly for the Signal Fault Diagnosis)
    2011-05-04 16:37:41下载
    积分:1
  • Matlab
    用Matlab软件求解微分方程 的解析解和数值解(Analytical solutions and numerical solutions of differential equations solved using Matlab software)
    2013-04-07 21:07:20下载
    积分:1
  • SEP
    实现了SEP: A Stable Election Protocol for clustered heterogeneous wireless sensor networks算法,适合做传感器网络分簇算法的人研究。(SEP: A Stable Election Protocol for clustered heterogeneous wireless sensor networks , we implement the algorithm, and this code is suitable for those who do research in cluster algorithm in Wireless sensor network )
    2011-11-30 09:45:20下载
    积分:1
  • Split_TIADC_Matlab_Simulation
    劈分结构时间交织ADC校正仿真 matlab(Split_TIADC_Matlab_Simulation)
    2017-08-30 10:56:03下载
    积分:1
  • 696516资源总数
  • 106913会员总数
  • 8今日下载