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dsss
Direct sequency spread spectrum
- 2006-06-19 11:01:53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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dB_conv
MATLAB scripts for conversions to 10dB and 20dB as well as the inverse conversion of both.
- 2010-05-07 06:51:05下载
- 积分:1
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zzkmatla
对答题卡考生考号进行识别,对图片进行灰度,切割处理,其中有部分实用对网站的建设。(Candidate number on the answer sheet to identify candidates, on the image to gray scale, cut processing, in which some practical construction of the site.)
- 2021-04-28 18:08:43下载
- 积分:1
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APF_I
matlab下的APF仿真 运行稳定有谐波分析(APF matlab simulation run under steady harmonic analysis)
- 2014-11-29 09:50:39下载
- 积分:1
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6_dof-rbf-_model
给出了机械手的数学建模,实现rbf自适应控制建模和控制器,最后通过matlab程序仿真实现。(The mathematical modeling of robot to achieve the rbf adaptive control modeling and controller, and finally through simulation matlab program to achieve.)
- 2013-04-11 15:26:55下载
- 积分:1
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minitabguiderevised
Easy guide for learning Minitab
- 2012-10-17 15:50:29下载
- 积分:1
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nonlinear-oscillation-example
介绍了使用MATLAB绘制相图及庞加莱映射(nonlinear oscillation)
- 2016-05-04 22:24:59下载
- 积分:1
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CUMTRUE
参数化双谱估计,用语对参数进行估计.可以等同ARMA模型构造.可以()
- 2007-09-27 08:24:31下载
- 积分:1
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troper_noise_1
用MATLAB仿真MEMS用斩波放大器对有色噪声的抑制作用(MATLAB troper noise)
- 2012-02-13 17:45:24下载
- 积分:1