AQI

基于双门限的频谱感知算法的MATLAB程序(MATLAB program based on dual threshold spectrum sensing algorithm)

costas环解调程序，需要的可以参考一下。costas环解调.m(It is a matlab code for demodulation as costas ring .if you are interested in it, you can refer to it.)

利用MATLAB实现多用户的扩频通信的发送和接受，程序可以直接跑，不需要改动！(The use of MATLAB implementation of multi-user spread spectrum communication send and receive, the program can be directly run, no changes!)

BP算法数值实验的四个程序,实验一：给定七个输入的单层神经元以及输入P，比较不同传递函数所得到的输出结果。实验二：训练单层神经元BP网络，使其权值和阈值符合一定的精度，并给出误差曲面和动态逼近过程。实验三：训练一个隐层（含五个神经元）的单输出BP网络，给出动态逼近过程和训练好的权值和阈值。实验四：设计一个三层BP网络，实现对非线性正弦函数的逼近。(The four programs of the BP algorithm numerical experiments.)

关于16QAM的仿真，包括调制和解调部分(base on 16QAM simulink,inclding modulation and demodulation)

线性调频信号的维格纳分布，伪WVD，平滑WVD比较，并且给出维格纳分布三维表示。方便学习LFM信号。(Linear frequency modulation signal of the wigner distribution, pseudo WVD, smooth WVD comparison, and give the wigner distribution 3 d said.Convenient learning LFM signal.)

卡尔曼滤波器是一个（最优化自回归数据处理算法）。对于解决很大部分的问题，他是最优，效率最高甚至是最有用的。(The Calman filter is an (optimized autoregressive data processing algorithm). For solving most problems, he is the best, the most efficient and even the most useful.)

说明：  用于进行M-K趋势分析、突变分析代码，可以计算趋势和突变点寻找检验；并附有魏凤英老师书籍电子版，供理论参考(For M-K trend analysis, mutation analysis code, the trend and mutation point can be calculated to find the test; and the electronic version of Mr. Wei Feng Ying's book is provided for theoretical reference.)

说明：  matlab图像处理，进行左右两图的匹配，有图像载入界面，匹配实现方便(matlab image processing, for about two graph matching, has image loading interface, matching the achievement of convenience)

说明：  The m_map mapping package for matlab, it can also run in octave with some minor modifications.