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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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zuixiaoercheng
用最小二乘法反应雷达得到的图像,得到各种数据特征参数(Reaction of the least square method to obtain the radar image data to obtain various characteristic parameters)
- 2013-10-03 09:52:07下载
- 积分:1
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yizhi
利用小波分析中的小波抑制对信号进行处理,出去噪声和振动对信号的影响,得到源信号。(The use of wavelet analysis wavelet inhibition of signal processing, the signal out of noise and vibration on the impact to be the source signal.)
- 2009-12-15 17:39:54下载
- 积分:1
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DSP
Digital Signals Processing 数字信号处理(方法、技术)
Digital Signals Processor 数字信号处理器
- 2010-12-31 11:51:41下载
- 积分:1
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cdma_power-control
CDMA移动通信系统功率控制算法的MATLAB仿真实现(power control)
- 2012-04-19 19:52:06下载
- 积分:1
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pca
给定一组数据,利用特征值方法简单的计算其主成分,简单易懂,适合初学者学习(simple matlab code of PCA)
- 2013-01-17 10:16:21下载
- 积分:1
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Facial-Recognition-System
人的面部识别程序,检测正确率很高,经过对多账户照片的识别,正确率为百分之一百(Facial recognition program, the detection accuracy is high)
- 2020-07-04 11:20:01下载
- 积分:1
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Gabor
Gabor滤波器实现图像的滤波,含有Gabor核函数,有助于理解Gabor的各个参数设置及Gabor滤波器的基本原理,适用于学习研究(Gabor filter can be applied in image filtering, containing the Gabor kernel function.It is helpful to understand the basic principle of each parameter setting and Gabor filter , and suitable for learning)
- 2013-11-21 18:22:53下载
- 积分:1
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hankel
说明: 随机子空间法中利用结构响应构造块汉克尔矩阵(Building block Hankel matrix)
- 2019-12-31 00:39:48下载
- 积分:1
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AR_coatings
SOA Anti Reflection Coating simulation
- 2012-09-21 05:38:16下载
- 积分:1