notchdemo

face recognition source code for matlab and high recognition rate

matlab仿真计算电磁波回波信号。。。。。。。。。(computer backscattered field)

分形维数计算的毯子算法matlab代码,毕业设计有用，搭建OFDM通信系统的框架。( Fractal dimension calculation algorithm matlab code blankets, Graduation useful Build a framework OFDM communication system.)

目标定位和跟踪的源程序，用于声目标的定位于跟踪 (target location and tracking of the source for acoustic target tracking in the positioning)

经典的香农采样定理认为,为了不失真地恢复模拟信号,采样频率应该不小于奈奎斯特频率(即模拟信号 频谱中的最高频率)的两倍.但是其中除了利用到信号是有限带宽的假设外,没利用任何的其它先验信息.采集到 的数据存在很大程度的冗余.Donoho等人提出的压缩感知方法(Compressed Sensing或Compressive Sampling, CS)充分运用了大部分信号在预知的一组基上可以稀疏表示这一先验信息,利用随机投影实现了在远低于奈奎斯 特频率的采样频率下对压缩数据的直接采集.该方法不仅为降低采样频率提供了一种新思路,也为其它科学领域 的研究提供了新的契机.该文综述性地阐述了压缩感知方法的基本原理,给出了其中的一些约束问题和估计方法, 并介绍压缩感知理论的相关问题———矩阵填充,最后讨论了其未来可能的应用前景. (According to the conventional Shannon s sampling theorem,in order to represent the analog signal,the sampling rate should not be less than twice the Nyquist sampling rate.Howev- er,this theorem only makes use of the bandwidth information.As a result,the collected data contain many redundant information.The recently proposed sampling method,compressed sens- ing or compressive sampling(CS),can collect compressed data at the sampling rate much lower than that needed in Shannon s sampling theorem by exploring the compressibility of the signal. This paper presents a review on the basic theory of CS.Some of the restrictions and recovery methods in CS are also discussed.Finally,some potential applications based on CS are presented. )

An implementation of Horn-Schunck optical flow method for 3-D images(This is an implementation of Horn-Schunck optical flow method for three dimensional images. A demo with test dataset is given.)

基于快速傅里叶变换的GUI设计，能对多个输入序列进行FFT分析，并在画面上显示出输入信号，经过FFT处理，经过IFFT处理的信号波形(GUI design based on the fast Fourier transform, FFT analysis of a plurality of input sequences, and displayed on the screen of the input signal after FFT processing, the signal waveform after the IFFT processing)

SIGMA DELTA MODULATOR

CDMA系统仿真，包括CDMA基本原理及cdma2000通信系统仿真。(cdma system simulation, include princple of cdma and cdma 2000 system simulation)

说明：  压缩感知（Compressive Sensing，CS），有时也叫成Compressive Sampling。相对于传统的奈奎斯特采样定理——要求采样频率必须是信号最高频率的两倍或两倍以上（这就要求信号是带限信号，通常在采样前使用低通滤波器使信号带限），压缩感知则利用数据的冗余特性，只采集少量的样本还原原始数据。(（Compressive Sensing，CS）)