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此代码仿真了一个语音输入输出系统，语音信号经过AD转换后，经过DSSS调制解调后，通过DA转换还原输入的声音，每一步的的波形都可以观测，对实际DSSS系统设计有很大的参考价值(This code simulation of a voice input and output systems, speech signal after AD conversion after DSSS modem through DA conversion to restore the input voice, each step of the waveform can be observed, the actual design of DSSS systems have great reference value)

MATLAB已成为多学科、多种工作平台的功能强大、界面友好、语言自然并且开放性强的大型应用软件，目前的最高版本是6.0版。本教程以6.0版为基础，从高等工科院校的数学课程出发，提供了使用MATLAB的实践性指导。本教程以教学的手段，系统详细地介绍了MATLAB在高等数学、数值分析、函数作图、线性代数、概率统计和优化理论中的应用，并配备了大量的例题，让读者能很快掌握MATLAB的运算技巧。 本教程按逻辑编排，自始至终用实例描述，既适用于初学者自学，也适用于高级MATLAB用户。可作为高等数学、数值分析、工程数学、数学建模、线性规划等课程的教学参考书，也可作为科技工作者学习和使用MATLAB的参考书，还可作为数学实验的教学用书，特别适合用作理工科大学生学习数学课程的教学辅导书。 本教程的光盘内容详尽、实例丰富：包含了MATLAB实例的源文件，函数/命令及注解，程序实例。(MATLAB has become a multi-disciplinary, multi-working platform powerful, user-friendly, language, natural and open and strong large-scale software applications, currently the highest version is 6.0. This tutorial with version 6.0 as the foundation, the mathematics curriculum in engineering colleges starting to provide a practical guide for using MATLAB. This tutorial with a medium of instruction, the system described in detail MATLAB in advanced mathematics, numerical analysis, function graphing, linear algebra, probability and statistics and optimization theory, application, and is equipped with a large number of Example, so that readers can quickly grasp the MATLAB computing skills. This tutorial logically arranged from beginning to end examples describing both self-study for beginners, but also to advanced MATLAB users. Can be used as advanced mathematics, numerical analysis, engineering, mathematics, mathematical modeling, linear programming courses teaching reference books, but )

基于matlab实现语音信号的采集和处理，包括频谱分析，显示实时A声级(Based on matlab realize the voice signal acquisition and processing, including spectral analysis, display real-time A sound level)

2PSK的链路仿真，信号源的产生，PCM编码，调制解调以及加燥(2 psk link simulation signal source, PCM coding and modulation demodulation and dry)

果蝇算法性能测试函数，用于对算法优化进行相关测试，代码简洁，并进行了封装(The performance test function is used to test the algorithm optimization. The code is concise and encapsulated.)

动态矩阵控制，是一种典型的先进控制算法，目前已经在炼油、化工、以及火力发电厂有了广泛的应用。(DMC has broad use in many field,including petroleum，Chemical industry，etc.)

64 QAM mod and demod

说明：  对带噪图象进行处理，削去不必要的东西，抗干扰，(right image processing, cut unnecessary things, interference,)

Optimal SVC using PSO

mathematics with matlab