matlab-make-miniPhotoshop

直接序列扩频系统仿真模型，通过学习仿真程序设计的函数运算，可以对其他类似扩频系统举一反三(Direct Sequence Spread Spectrum system simulation model, by learning a function of simulation programming operation, you can learn by analogy to other similar spread-spectrum systems)

水印抗攻击：由高斯正态分布序列 g1 产生 36×4 的水印信号 w0，w0 由(0,1)组成。(Watermark against attacks: from the Gaussian normal distribution generate 36 × 4 series g1 watermark signal w0, w0 from (0,1) component.)

说明：  CEC2017单目标测试函数，分享给需要的同学们(CEC2017 single objective test function)

考虑一个线性自适应均衡器的原理方框图如《现代数字信号处理导论》p.275自适应均衡器应用示意图。用LMS算法实现这个自适应均衡器，画出一次实验的误差平方的收敛曲线，给出最后设计滤波器系数。一次实验的训练序列长度为500。进行20次独立实验，画出误差平方的收敛曲线。给出3个步长值的比较。(consider a linear adaptive equalizer block diagram as the principle of "modern digital signal processing" Introduction to the p.275 adaptive equalizer application schema. LMS algorithm with the adaptive equalizer, painted a square experimental error of convergence curve, given final design filter coefficients. Experimental a length of the training sequence to 500. Conduct 20 separate experiments, painted square error of the convergence curve. Given three step-value comparisons.)

产生一个长为1000的二进制随机序列，“0”的概率为0.8，”1”的概率为0.2； 对上述数据进行归零AMI编码，脉冲宽度为符号宽度的50 ，波形采样率为符号率的8倍，画出前20个符号对应的波形（同时给出前20位信源序列） 改用HDB3码，画出前20个符号对应的波形 改用密勒码，画出前20个符号对应的波形 分别对上述1000个符号的波形进行功率谱估计，画出功率谱 改变信源“0”的概率，观察AMI码的功率谱变化情况(A length of 1000 random binary sequence, and " 0" with a probability of 0.8, " 1" with a probability of 0.2 the AMI code above zero, the pulse width of the symbol width of 50 , the waveform sampling rate Symbol rate 8 times, draw the top 20 of the waveform corresponding to the symbol (the first 20 and gives the source sequence) switch HDB3 code, the first 20 to draw a waveform corresponding to the symbol to switch Miller code, the first 20 symbols correspond to draw The waveforms of the symbol of the waveform 1000 power spectrum estimation, shown to change the source power spectrum " 0" , the probability of observation of the power spectrum of AMI code changes)

实现MATLAB版本的卷积码，通过对移位寄存器的研究实现了卷积码的生成(MATLAB version convolutional code, through the shift register implementation of a convolutional code generated)

DTX matlab code for g729 annect B

基于saber仿真软件,是对反激变换器仿真设计的。(Flyback converter design saber-based simulation software)

数据互联算法。绘制出了目标真是轨迹、测量轨迹、PDAF估计轨迹和NNSF估计轨迹，并进行了对比分析。(Data Association Algorithm. Drawn out of the goal really track the trajectory measurements, PDAF estimated trajectory and NNSF estimated trajectory, and a comparative analysis.)

主要是matlab概率统计工具箱的介绍.(mainly statistical probability of Matlab Toolbox presentation.)