PAPR

常用数字调制解调方式的仿真结果，仿真模型，仿真图(Commonly used digital modulation and demodulation of the simulation results)

一个最简单的主成分分析的源代码，希望对朋友们有所价值(A simple principal component analysis of the source code, I hope my friends have value)

对图像求拉普拉斯变换，分别使用中心为-4、-8其他值均为1的拉普拉斯滤波器(Laplace transform of image, Laplace filter respectively using the center for- 4、-8，other value for 1)

此时例是关于用matlab实现牛顿法求解非线性方程组，（包含牛顿法、改进的牛顿法.梯度法、最速下降法代码），里面附带可以直接运行的程序。(At this case is about solving nonlinear equations using matlab Newton, (including Newton, Newton method to improve the code), which comes with the program can be run directly.)

自适应滤波中的最速下降法仿真程序，课程的大作业，可以绘制梯度曲线(Adaptive Filter steepest descent method simulation program, course the big job, you can draw the gradient curve)

matlab程序的课程设计与要求，在matlab中的应用 (matlab process)

说明：  通信系统仿真，调制解调编码,模拟的和数字的都有(Communication system simulation, modulation and demodulation)

国外matlab，时间转换程序，层次清晰，有源代码，也有界面( Foreign matlab, time conversion process, the level of clarity, source code, there are interface)

这里面有两个程序，两个都是采用4QAM调制。不过个人觉得第一个更容易懂，因为写的很有条理。我改的那个程序就是根据这个来的。 不过在这里面有个问题就是信道系数只能是由高到低，大家可以试试，改成[0.227 0.46 0.688 0.46 0.227]这个是老师给我的仿真中常用的信道系数，这个成为归一化信道，就是系数平方和为1. 第二个程序没有涉及到信道系数，但是这个程序当中，在128个子载波中，前后有32个空载波，这个在OFDM中也是经常用的，这样可以降低误码率。 (And there are two programs, two are based on 4QAM modulation. But personally feel that the first is easier, because the writing is organized. I changed that procedure is based on the past. However, there is a problem in that there is only channel coefficients from high to low, we can try and change into [0.227 0.46 0.688 0.46 0.227] This is the teacher gave me the simulation channel coefficient commonly used, this became normalized channel, is coefficient of the square and is 1. The second program is not related to channel coefficients, but this program which, in the 128 sub-carriers, the before and after the 32 air carriers, the in OFDM is also often used, which can reduce the error rate.)

calculate MSE and PSNR