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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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fdmRadio
FDM modulation with matlab
- 2015-04-10 11:39:32下载
- 积分:1
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射线追踪方法rayce
射线追踪方法,求取地震射线在水平多层介质中传播路径。在此基础上合成地震记录,并进行动校正。(Ray tracing method, obtaining seismic ray propagation path in a horizontal multi-media. Synthetic seismograms On this basis, and thus the correction action.)
- 2016-01-20 09:19:17下载
- 积分:1
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block_mp
压缩感知里面的稀疏重建问题,在原来MP的算法的基础上,提出了分块的思想,即将原子库分块后,测试算法的性能。(Compressive sensing is refered as the block sparse algorithm is described,that is based on the original MP algorithm,and the atom libruary is divided into blocks ,and the performance is testified.)
- 2010-10-27 19:10:08下载
- 积分:1
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cvmx-helper-xaui
Returns Number of ports on the interface. Zero to disable.
- 2015-03-18 11:25:45下载
- 积分:1
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去噪 matlab
去噪为仿真信号建立;
去噪1为eemd去噪;
去噪2为形态滤波器;
去噪3为小波去噪,全局阈值,给定阈值(软阈值,硬阈值);
去噪4为实际去噪(2 for morphological filter denoising
Denoising 3 as the wavelet denoising, global threshold, the given threshold (soft threshold and hard threshold)
4 for practical denoising denoising)
- 2016-07-11 15:27:39下载
- 积分:1
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dwchengxu
说明: 风力发电机组并网潮流计算;并网对大电网的影响;前腿迭代(Wind power machine combine net current calculation)
- 2020-11-16 13:29:42下载
- 积分:1
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Bayer
贝叶斯公式在临床中的应用是利用贝叶斯公式根据验前概率和条件概率来推算验后概率, 进而帮助诊断患者到底患种疾病中的哪一种。具体方法是根据以往积累统计资料, 对种疾病的验前概率人及各种条件概率人进行估算。在诸症状的一种具体组合已经出现的条件下, 按贝叶斯公式计算出各种疾病在这种具体症状组合下发生的概率即验后概率。比较各疾病的验后概率。如果某疾病人的验后概率明显大于其它疾病的验后概率, 便可诊断患者患的哪种疾病。(According to mass statistical results, try to work out the probability of 4 diseases and the class-conditional probability()
- 2010-05-13 17:12:10下载
- 积分:1
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obscurance
Obscurance Invariance in Template Matching
- 2013-11-20 22:04:13下载
- 积分:1
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BP
这个是编的BP神经网络的程序,对于初学神经网络的人有很好的借鉴(This is a series of BP neural network program, for the beginner neural network is a good reference)
- 2013-11-05 22:41:49下载
- 积分:1