OFDM

QR code matlab source code This source code can be useful in coding n decoding QR codes.

The code implements an approximation of the multivariate bandwidth calculation from (The code implements an approximation of the multivariate bandwidth calculation from [1]. In contrast to other multivariate bandwidth estimators, it can be estimated from a preclustered sample distribution offering a simple way of estimating compact and accurate KDEs with variable kernels.)

说明：  压缩感知（Compressive Sensing，CS），有时也叫成Compressive Sampling。相对于传统的奈奎斯特采样定理——要求采样频率必须是信号最高频率的两倍或两倍以上（这就要求信号是带限信号，通常在采样前使用低通滤波器使信号带限），压缩感知则利用数据的冗余特性，只采集少量的样本还原原始数据。(（Compressive Sensing，CS）)

计算系统的lyapunov指数，利用wolf方法。(Lyapunov exponent calculated using the wolf approach.)

PSO：粒子群优化算法，用C++和matlab两种语言实现的 RVM:相关向量机，比SVM更高级些 样本熵和近似熵：计算动态系统中时间序列的一个重要手段(PSO: PSO algorithm, using C++ and matlab realization of two languages RVM: relevance vector machine, some more advanced than SVM Sample entropy and approximate entropy: Calculating an important means of dynamic system in time series)

(2,1,4)卷积码BCJR译码器的实现，算法参照信道编码理论教材，注释很容易理解(（2,1,4）conversion code, BCJR decoding)

说明：  用于验证非线性振动系统的非线性振动方程的龙格库塔方法(Runge Kutta method for verifying nonlinear vibration equation of nonlinear vibration system)

Effect of wind speed characteristics on DFIG performance

这是很实用的一个matlab的录音界面小程序，经行语音录制，分析等。(This is a very useful little program matlab recording interface, the line of voice recording and analysis.)

这是洛伦兹曲线问题用matlab画出一个函数的图像，体现了初值的影响(This is a problem with the Lorenz curve matlab draw a function of the image, reflecting the impact of the initial value)