本程序用于仿真QPSK的解调

the useful information for project guide.Here is matlab pdf

matlab 数字水印的处理，可实现文件的加密处理(matlab digital watermark processing, encrypted files can be realized)

基于AWGN通道的4ASK关于ber的仿真(BER Performance of 4ASK in AWGN Channel we study how to use amplitude to carry more digital bits in one data symbol. We use the 4ASK to modulate the signals)

usps数据库为标准手写数据库，此为mat数据文件，含训练集和测试(USPS database is a standard handwritten database, which is a mat data file, including training set and test)

基于matlab的16QAM调制源代码，并进行的误码分析(Based on the 16QAM modulation matlab source code, and error analysis carried out by)

基于图像处理的HOG特征提取，可根据参数设置来确定自己设定的HOG特征(determined according to its own set of parameter settings)

说明：  利用五点差分格式和Jacobi迭代法，求解精确解和数值解的误差，判断阶数是否正确(Five-point difference scheme and Jacobi iteration method are used to solve the error between exact solution and numerical solution and to judge whether the order is correct or not.)

说明：  给出了一种极限学习机（elm)算法，并用汽油近红外光谱辛烷值数据集对ELM网络进行训练，最后用ELM对汽油辛烷值进行预测，并对预测结果进行评价。文件内含ELM工具箱，可直接在MATLAB运行。(An extreme learning machine (elm) algorithm is presented, and the ELM network is trained with the data set of gasoline near infrared spectroscopy octane number. Finally, the gasoline octane number is predicted by ELM, and the prediction results are evaluated. The file contains ELM toolbox, which can run directly in MATLAB.)

这是一个用极大似然函数估计狄里克莱分布的matlab程序(This is a great likelihood function using the estimated Dirichlet distribution matlab program)

bit load code is for using in ofdm