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word-recog
Small speech recognition program demo
- 2012-06-03 21:08:18下载
- 积分:1
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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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entropy
采用熵值法求特征分量的权重,一般可用于特征选择与特征提取(Entroy algorithm ia used to be calculate the weight of each element,and is helpful in the selection and extraction of features)
- 2014-02-25 10:52:28下载
- 积分:1
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KLDCT_Markov
用于现代信号分析与处理课程,作用是实现K-L变换和DCT变换。(For modern signal analysis and processing programs, the role is to achieve the KL transform and DCT.)
- 2014-02-24 16:28:57下载
- 积分:1
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photoresize
一个用于改变图像大小的matlab程序 有需要的朋友可以看下(One for changing the image size of matlab programs need a friend to see next)
- 2010-06-11 08:30:08下载
- 积分:1
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signal
用Fourier变换求信号的功率谱(分段周期图法)(Calculate the power spectrum of signal using Fourier transform method)
- 2014-09-22 16:11:45下载
- 积分:1
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DCT
Discrete Cosine Transformation
- 2013-10-01 20:31:48下载
- 积分:1
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mat_into_hdr
把mat文件 转换成 hdr格式文件。可用SPM调用。(Put into a mat file hdr files. SPM can be used to call.)
- 2021-01-11 21:48:49下载
- 积分:1
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pf_filter
五种常用的粒子滤波算法,里面有ekf算法的比较 欢迎大家下载学习,含注释(five kinds of pf filter. it will help you to study pf filter.)
- 2010-08-19 15:23:11下载
- 积分:1
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UTUKFUPF
说明: UT、UKF、UPF的课件,对学习非线性滤波的人员很有参考价值。(UT, UKF, UPF courseware, learning nonlinear filtering valuable personnel.)
- 2008-08-27 20:43:39下载
- 积分:1