yushuai

该模型是一个模拟信号数字化传输系统，该模型只通过了PCM编码模块和译码模块(The model is an analog signal digital transmission system, the model only through the PCM coding and decoding module module)

An all-optical regeneration scheme for DQPSK and QPSK signals using phase-sensitive amplifiers (PSAs) is studied and its effectiveness is investigated through numerical simulations. By leveraging the ability of PSAs to provide phase and amplitude regenerative amplification, we show significant simultaneous suppression of both phase and amplitude noises of (D)QPSK signals under optimized conditions. The reduction in the phase noise variance of a noise-corrupted DQPSK signal obtained by one such regenerative amplification can be as large as 5.5 folds, showing its good potential for distributed optical regeneration of (D)QPSK signals.  2008 Elsevier B.V. All rights reserved.

矩量法计算二维圆柱体散射，通过比较波长与半径比值，分析雷达散射截面结果变化。(The method of moment method is used to calculate the scattering of two-dimensional cylinder. The ratio of wavelength and radius is analyzed.)

利用Matlab生成GPS C/A 码的基带信号。 （1）产生卫星PRN 号码为“5”的一组C/A 码； （2）循环生成25 页的导航数据，GPS 时间可填入一固定的已知数值； （3）生成C/A 码扩频信号，每个C/A 码码片给出4 个采样数据； （4）基带信号采用方波信号，电平为0 和1，占空比为50 ％，不加入噪声，进一步生成某个特定的中频信号。(Matlab generated using GPS C/A code base band signal. (1) generation of satellite PRN number is " 5" a set of C/A code (2) loop generates 25 of the navigation data, GPS time can fill a fixed known value (3) to generate C/A code spread spectrum signal, each C/A code chip gives the four sampling data (4) baseband signals using square wave signal, level 0 and 1, 50 duty cycle, not to join the noise generated further a specific frequency signal.)

模式分类（杜达）（第二版）电子书 及原书中的代码。绝对值得永久收藏。(Pattern Classification (Duda) (second edition) book, e-books and the original code. Definitely worth the permanent collection.)

说明：  介绍了图论中最短路径的floyd最短路算法程序(Describes the shortest path in graph theory, shortest path algorithm program floyd)

The program open any file with hex format.and ascii code translate to right if they are visiable!

mimo ofdm 信道估计代码 非常实用 (mimo ofdm blind estimation ,it is very good )

Basics of MATLAB matlab is a software package that lets you do mathematics and computation, analyse data, develop algorithms, do simulation and modelling, and produce graphical displays and graphical user interfaces.

一种适用于matlab的无线传感器分簇算法(a wireless sensor network clustering algorithm in matlab )