Hilbert-transformation

本文介绍了直接序列扩频系统中数字Costas环的设计与实现，用来实现载波同步的闭环算法(This paper introduces the direct sequence spread spectrum digital Costas loop in the design and implementation to achieve closed-loop carrier synchronization algorithm)

边缘检测，很实用的，在MATLAB6.0环境下调试使用过 (bound search)

研究论文基于WEB环境与MATLAB技术的图像检索系统的实现(Research papers based on WEB technology, environment and MATLAB Image Retrieval System)

用matlab实现简单的图像的放大和缩小(use matlab)

说明：  这是一个具有导频和预失真的MIMO-OFDM的simulink(this is a simulink about MIMO-OFDM with pilot aided and pre-distortion)

利用LSB算法去实现了电子水印技术。代码完全实现了嵌入以及提取， 算法同时包含了4种攻击算法以及利用psnr测量提取的水印和攻击后提取的水印(This algorithm describes digital watermark technique by using LSB. This code implement embedding and extraction. At the meanwhile, this algorithm includes 4 different kinds of attacks and in the end, measure psnr between extracted watermark and attacked extracted watermark)

This function is used to evaluate the max height and the max distance of a projectile and plot the trajectory. Inputs v0 : The initial velocity in m/s theta: The angle at which the projectile is fired in degrees Outputs hmax : The maximum hieght in m dmax : The maximum distance in m

图像加密，使用量logistic混沌映射对图像进行了加密和解密，可以直接运行(Image encryption, usage logistic chaotic map for image encryption and decryption, you can directly run)

几种常用的MATLAB数字信号处理的信号代码，包括LFM、FSK、BPSK、QPSK、sin等信号(matlab codes for some useful signal to study digial signal processing, includ LFMFSKBPSKQPSKsin and so on.)

使用simulink模型搭建的无人机纵向仿真模型，研究生阶段飞控大作业或许能用到(A vertical UAV simulation model built with simulink ,maybe useful to the graduates flight control lectures large operations )