xianputiqu

本文提出了一种适用于低轨卫异扩频通信系统的多普勒频移快捕方法.该方法基于数字匹配滤波器及自动频率控制环路_利用数字匹配滤波器的囚码快捕特性及其输出主相关峰值对频偏的敏感性，缩短多普勒频移的 捕获时间.论文首先推导了多普勒频移的平均捕获时间表达式，然后根据数值分析结果得到了准最佳捕获判决策略，最后通过比较验证了该快捕方法相对于传统串行捕获方法在性能上的提高. (This paper presents a low-orbit health for different spread spectrum communication system fast catching the Doppler shift method, which based on digital matched filter and automatic frequency control loop _ prisoners using digital matched filter code features rapid acquisition and the output of the main correlation peak frequency deviation of the sensitivity of the Doppler frequency shift to shorten acquisition time. paper first derive the mean Doppler shift acquisition time expression, then the numerical results obtained quasi-optimal capture decision strategies, and finally verified by comparing with the rapid acquisition method to capture the traditional method of serial improvement in performance.)

Matlab下，基于DCT&DWT 的音频数字水印的简单实现，包含了水印的生成和提取过程(Audio watermark based on DCT & DWT)

CODE DE RESOLUTION DE L EQUATION D HELMOTZ EN FORMULATION INTEGRALE 2D Problème Fréquentiel Intérieur avec Condition en flux (Neumann)

MATLAB5.X入门与提高.pdf 想学习MATLAB编程的入门书籍，可以参考(Introduction and improvement of MATLAB5.X PDF want to learn MATLAB programming entry books, can refer to )

在做复合形法优化时，用到《精通MATLAB最优化设计》一书中的复合形法程序，发现做其他例题时运行不了。去掉bug后，改进如下，如果你遇到同样问题，不妨下来试试。如果你没有Funval.m，可以将程序中的Funval函数换成subs(In doing complex method optimization, use the " Mastering MATLAB Optimization Design," a book of complex method program, found other examples can not do when running. After removing the bug, improvements are as follows, if you encounter the same problem, we might try it. If you do not Funval.m, the program can be replaced by a function of Funval subs)

基于matlab，利用信息熵法排序。例子为对学校进行排序(Based on matlab, using information entropy ordering. Examples of the sort of school)

simulink的fft分析 中间加入hamming窗口(fft simulink in the middle of adding hamming window of)

遺傳算法應用於MATLAB 遺傳算法應用於MATLAB(Genetic algorithm is applied to MATLAB MATLAB genetic algorithm is applied)

To calculate huffman in information theory.

基于MATLAB的FHSS通信系统的设计与实现(The design of fhss communication system based on matlab)