spectrum

在通信系统仿真当中,常常会使用到伪随机信号,该源代码文件中包含两类最为常用的伪随机信号gold 序列的生成和m序列的生成,程序清晰有注解(In the communications system simulation are often used pseudo-random signal, the source code file contains two types of most commonly used pseudo-random signal sequence to generate gold and m sequences generated, the program has clear notes)

说明：  《Matlab从入门到精通》所有的源程序。(《Matlab from entry to the master》 all of the source.)

说明：  使用matlab实现最小均方算法，画出了权值迭代图和搜索过程图。(Realized least mean-square algorithm（LMS）by using matlab, drawed the right value iteration figure and search process maps.)

说明：  wiener filtering, improving speech, speech recognition

this code of Particle Swarm Optimization algorithm

是有关小波分析mallat算法，简便实用(Is related to wavelet analysis mallat algorithm, simple and practical)

说明：  基于MATLAB软件的交流永磁同步电机调速系统研究 介绍了一种采用磁场定向理论控制交流永磁同步电机的调速系统，应用现代控制理论对 电机直交轴耦合分量进行了解耦，并利用经典控制理论设计了电流环和角速度环调节器。MATLAB 仿真 结果证明了该方法的有效性，但系统调试时仍需根据具体情况适当调整以得到更理想的效果。(MATLAB software based on the exchange of permanent magnet synchronous motor speed control system introduces a theory of the use of field-oriented control of AC permanent magnet synchronous motor speed control system, the application of modern control theory on DC motor shaft coupling the decoupling components and to make use of classical control Theoretical Design of a current loop and the angular velocity of ring modulator. MATLAB simulation results prove the effectiveness of the method, but the system still need to debug when appropriate adjustments in accordance with specific circumstances in order to obtain better results.)

说明：  K分布高斯杂波仿真，matlab，网格映像法(Gaussian K distribution clutter simulation, matlab, mesh imaging method)

摘 要: 利用MATLAB平台的SIMULINK功能编写了一套QDPSK通用功能模块库，并在此基础上进行了多项可视化仿真,较 好地显示了数字通信的工作方式和优越性，以及采用SIMULINK进行仿真的良好的演示效果，为QDPSK数字通信系统的研究提 供了一个较好的软件平台。(Abstract: This paper gives a group of module library for digital communication function applying MATLAB’ s SIMULINK function， and offer a group of software to perform the visualizing simulation. The software perfectly shows the advantage and the process of normal digital communication. More over, it provides a software base for further study on QDPSK Digital communication.)

计算了半无限大压电铌酸锂半空间中Rayleigh波的传播速度(Calculate the semi-infinite half space piezoelectric lithium niobate Rayleigh wave propagation velocity)