OFDMsystem

说明：  目前各类粒子群算法的应用、改进、参数设置方法(At present the application of various types of particle swarm optimization, improvement, parameter setting method)

图像边缘检测代码，基于matlab7.0。基于小波变换的边缘检测。(Edge detection code, based on matlab7.0. Edge detection based on wavelet transform.)

matlab程序代码，三维杆单元有限元结构刚度和质量矩阵的生成(Matlab program code, 3 d finite element structure stiffness and stem the generation of mass matrix)

图像融合的matlab程序，把两张图片融合到一起(Image fusion matlab program, the two images fused together)

将Hex格式的数据转成Mif格式，供FPGA搭建系统时初始化RAM.(Hex format data will be converted into Mif format for initialization when the FPGA set up the system RAM.)

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)

说明：  带励磁系统和调速器的同步发电机仿真模型，可以用的(Simulation model of synchronous generator with excitation system and governor)

直接序列扩频，信道采用重复编码，2psk调制，针对白噪声，多径环境下的误码率仿真(Direct sequence spread spectrum, channel coding using repeated, 2psk modulation, for white noise, BER simulation of multipath environments)

此为在matlab环境下编写的适用于高维方程组求解的牛顿迭代法算法函数，为工程计算和大型模型求解带来便利。(This is written in matlab environment for high-dimensional equations of Newton method iteration algorithm to solve the function for engineering calculations and large-scale model solution convenience.)

MVAcltbern illustrates the (univariate) Central Limit Theorem (CLT). n*1000 sets of n-dimensional Bernoulli samples are generated and used to approximate the distribution of t = sqrt(n)*(mean(x)-mu)/sigma -> N(0,1). The estimated density (blue) of t is shown together with the standard normal (red).