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qpsk modulation and demodulation

最优PID控制器资料，包含matlab程序和详细的文档说明。对做pid控制的肯定有帮助( Optimal PID controller matlab program and documentation)

关于matlab通讯工具箱主要功能和函数用法介绍Communications+Toolbox4 User_s Guide(To introduce Communications+Toolbox4 User_s Guide matlab communication toolbox functions and function usage)

说明：  该例程实现了男女声音识别的算法，识别准确率较高(This routine realizes the algorithm of male and female voice recognition, and the recognition accuracy is high.)

利用混沌序列与传统的加密算法融合，实现对数据的加密解密(Chaotic sequence fused with traditional encryption algorithms to achieve the data encryption and decryption)

说明：  Ds直扩系统的一个仿真，不错的，可以看看(Ds DSSS system, a simulation, good, take a look at)

The file includes: checking stock data read in data covariance deviation minimum variance portfolio gui

1支持JUBB(类似UBB) 2留言数据的合法性检测,如EMAIL,主页地址 3支持繁体字符的输入 4出错页面美化 初始管理密码为：redhat (a support JUBB (similar UBB) two messages testing the legality of data, such as e-mail, home address three characters in the traditional support of the importation of four pages landscaping mistakes initial management of passwords : redhat)

data_acquisition_Simulink model

通信信号处理丛书，全面系统地阐述了信号处理的的基本理论与应用，是每个通信人的必备参考资料。 (Communication Signal Processing Series, a comprehensive and systematic exposition of the basic signal processing theory and applications, is an essential reference for each communication.)