MIMO-Wireless-Networks-chapter1-4

说明：  可以直接仿真各种模型下常用水声信道，包含Bellhop,Kraken等源代码(Simulating the basic underwater acoustic channel, including the code and theory of Bellhop, Kraken and so on.)

介绍常用的AT指令，包括gpsr初始化，发短信等(Commonly used in the AT commands, including the gpsr initialization, send text messages, etc.)

这是16QAM的仿真，带GUI界面，很好用的。(This is 16QAM simulation, with GUI interface, very useful.)

xws-security-3.0 ws安全包3.0版本(xws security 3.0 for development)

现代通信原理与技术课件，讲明通信原理，调制解调以及通信的过程。(Modern communication theory and technology courseware, made ​ ​ it clear that the process of communication theory, modulation and demodulation and communication)

是学习socket编程难得的pdf，udp，tcp编程必看(It is rare to learn socket programming pdf, udp, tcp programming see)

实现绘制信号的功率谱，两重自相关，滤波后时域，滤波器，频谱图，信号时域图以及自相关函数图等功能(The functions of drawing signal power spectrum, double correlation, filtering time domain, filter, spectrum, signal time domain and autocorrelation function diagram are realized.)

25.996信道模型的matlab代码，根据标准协议编写(channel model of 25.996)

dac8568驱动程序编程，可以控制dac8568进行输出(Dac8568 driver programming)

By building the generalized Sigmoid function relationship between normalized step-size and the power of error signal, a novel variable step-size NLMS algorithm is proposed. It is proved that the step-size of NPVSS-NLMS changes as the new algorithm does when A=σv -m and B=2. The physical meanings of the parameters in this algorithm are explored. The theoretical analysis illustrate that this algorithm combine the virtues of NPVSS-NLMS and Sigmoid function, and it leads to faster convergence rate and lower final misalignment. The computer simulation results support the theoretical analysis.