codes

matlab读取数据文件，进行fft，再写入数据文件，最后比较变化。(matlab to read data files for fft, and then write the data file, and finally compare changes.)

扩频系统，首先随机产生01序列，然后通过扩频，脉冲成型，BPSK调制发送，接收端接收进行解扩解调(The wide frequency system, first stochastically has 01 sequences, then through the wide frequency, the pulse formation, the BPSK modulation transmission, the receiving end receive carries on the despread demodulation. )

说明：  AMplitude mod and demodulation

基于matlab的小波神经网络算法的水文时间序列预测，基于1步和基于五步预测的程序，由于原始数据偏少，预测精度稍微差点(Hydrologic time series matlab wavelet neural network algorithm based on prediction, based on a step and five-step program to predict, because the raw data too few, almost a little prediction accuracy )

对于形心分析和算例,方便大家学习和使用.(For example centroid analysis and to facilitate them to learn and use.)

很实用的群优化智能算法，计算粒子群算法的源代码，所需优化的目标函数命名为fitness即可。(a partical swarm algorithm)

other example of data demodulation

希尔伯特黄变换，绘制IMF，边缘谱图，自己正在调试，中间些错误，待修正。(Yellow Hilbert transformation and draw the IMF, edge chart, you are debugging, among some mistakes, to be fixed. )

It is the code to demonstrate actof filtering

matlab实现logistic回归 利用牛顿迭代的方法得到最后的回归参数(matlab realize logistic regression using Newton iteration method to get the final regression parameters)