perceptron

脆弱水印的编程实现是一种基于空间域的脆弱数字水印如何嵌入 脆弱水印的编程实现(Programming fragile watermarking is based on spatial domain fragile watermarking to embed the fragile watermark Programming)

wallpaper MDI window

产生TU信道，可自行设置参数，支持MIMO功能(create TU channel，can set your own parameter,support MIMO)

该程序和文档研究了在单径瑞利信道中，BPSK的误码率性能，画出比特信噪比与误码率的关系曲线，具体公式在文档中给出。(The study of the relationship between programs and documents in a single path Rayleigh channel curve, the BER performance of BPSK, draw the bit error rate and signal to noise ratio, the specific formula is given in the document.)

This file is about vector control of PMSM. DTC - Direct torque control.

对一个调查样本绘制计数的频率分布图.要求输入的样本事先由小到大排好序。(to make a frequency distribution table for a sample)

频率估计问题一直是研究的热点。此为一个相位差法估计频率的程序代码，可供学习参考。(Frequency estimation has been the research focus. This is a phase difference method to estimate the frequency of the program code, for learning reference.)

说明：  室内可见光通信系统信道模型，用于室内可见光通信系统基础信道估计仿真实验(Channel Model of Indoor Visible Communication System for Basic Channel Estimation of Indoor Visible Communication System)

wave simlation matlb example

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)