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OFDM without noise performed with qpsk modulation

仿真程序：首先需要用一个随机发生器产生（0.1）内的均匀随机数，然后再将该序列映射到对应的幅度电平｛Am｝。然后将这个范围再分成4个相等的区间，这些子区间分别对应于4个信号比特的符号00，01，10，11。检测器观察到r=Am+n，并且计算r和4种可能传输的信号幅度之间的距离，它的输出Bm就是相应于最小距离的信号电平。Bm与真正的的传输信号幅度比较，差错计数器用来对检测器产生的差错计数。(Simulation program: first need to use a random generator (0.1) the uniform random number, then the sequence is mapped to the corresponding amplitude level {Am}. Then this range has been divided into four equal intervals, these sub-intervals corresponding to four signal bits of the symbol 00,01,10,11. Detector observed r = Am+ n, and calculate r and 4 possible transmission distance between the signal amplitude, its output corresponding to the minimum distance Bm is the signal level. Bm and the real rate of transmission of the signal comparison, error detection counter is used to generate the error count.)

说明：  考虑拉曼散射的matlab仿真，可用于对于光在光纤中传播的子程序。(Matlab simulation considering Raman scattering can be used as a subroutine of fiber laser simulation.)

说明：  编写一个程序，对输入的图像进行哈夫曼编码，显示原图像的熵、编码后的平均码字长度、并能够根据编码重建出图像。 Sobel算子和拉普拉斯算子进行锐化，并比较结果。(Write a program to image the input Huffman coding, the entropy of the original image displayed, encoded, the average code length, and be able to reconstruct the image according to encoding. Sobel operator and Laplacian sharpening, and compare the results.)

用专家系统优化下面的PID参数或设计一个专家控制器，被控对象为 并与PI控制算法进项比较(use expert system optimization below the PID parameters, or a design expert controller, and object to the PI control algorithm with a credit comparison)

说明：  awgn 信道下 ldpc与FQPSK的串行级联系统，(AWGN channel，serially concatenated FQPSK modulation system with ldpc)

【谷速软件】多变量函数的最速下降法 ” 可以做为参考使用 ([Software] Valley speed multivariable function steepest descent method can be used as a reference to use)

matlab program for fuzzy logic clustering

puma260机器人的变换矩阵计算及其工作区域绘制。(puma260 robot transformation matrix calculation and the work area to draw.)

It is a file which have matlab code for calculation of geometrical area such as circle,ellipse etc