Preemphasis

，用MATLAB实现快跳频通信系统的仿真。主要应用了SIMULINK和COMMUNICATION BLOCKETS两个模块。整个设计包括了信源产生部分、发送部分、跳频调制部分、信道部分、接收部分和结果分析部分共六个模块，核心技术是伪随机序列的产生和频率合成器的设计，而关键技术是收发两端的伪随机码元的同步。伪随机码的产生用S－函数编程来开发自己的SIMULINK模块。同步的实现是收发两端采用相同的扩频脉冲触发。而且在设计中每个模块都采用了模块封装技术，从而简化了框图结构(Using MATLAB to achieve fast frequency-hopping communication system simulation. The main use of SIMULINK and COMMUNICATION BLOCKETS two modules. The whole design, including part of the generated source, sending part of some frequency-hopping modulation, channel of the receiving part and the results of analysis of part of a total of six modules, the core technology is the emergence of pseudo-random sequence and frequency synthesizer design, and the key technology is the transceivers at both ends of the pseudo-random synchronization symbol. Pseudo-random code generated by S-function programming to develop their own modules SIMULINK. Synchronization is used to send and receive ends of the same spread-spectrum pulse trigger. But also in the design of each module using the module packaging technology, which simplifies the structure of the diagram)

利用MATLAB对原有声音波形进行加躁，去噪。得出加躁语音频谱图、去噪语音频谱图，以及对应文件。 (The original voice waveform with manic using MATLAB, denoising. The impatient voice spectrum, denoising voice spectrum graph, and the corresponding file.)

基于DCT变化域的鲁棒水印及脆弱水印的嵌入与提取(Embedding and Extracting Robust and Fragile Watermarks Based on DCT Change Domain)

This code calculates the 1 D FDFD for a TEM Electromagnetic Wave for a half space medium

这个程序用matlab演示扩频及其频谱。(Matlab demo using this procedure and its Spread the spectrum.)

用matlab浏览raw文件。matlab6.5下运行(View raw file using matlab. matlab6.5 run)

基于Henon映射的混沌伪随机序列发生器，用MATLAB7.1实现(Henon mapping based on Chaotic Pseudo-random sequence generator, to achieve with MATLAB7.1)

A network is a group of desktop or laptop computers (and other hardware devices, such as printers) that is connected together with the primary purpose of communicating and exchanging data. Networking is all about sharing, and it allows your computers to connect to the Internet, talk to each other, and share resources like files and printers.

matlab的程序，可用来进行船型识别。包括图像预处理，特征提取，船型识别三个方面。(matlab program can be used to identify the ship. Including image preprocessing, feature extraction, ship identification three aspects.)

power rectifire model for symetrical systems