SDHfenjie

OFDM系统，子载波数目1024，前缀数目256，循环数目256，加入了高斯白噪声(OFDM system, the number of subcarriers 1024, the number prefix 256, the cycle number of 256, by adding a Gaussian white noise)

matlab code for space time encoding

MATLAB Simulations for Radar Systems Design - 2004 一书对应的源代码，非常有用。(MATLAB Simulations for Radar Systems Design- 2004 a book that corresponds to the source code, very useful.)

THis is a matlab for EIT model

将OFDM技术运用在可见光通信的研究，并且把OFDM的高峰均比这一缺点进行了建设性的运用。(In particular, the use of OFDM (orthogonal frequency division multiplexing) for intensity modulation is investigated. The high peak-to-average ratio (PAR) in OFDM is usually considered a disadvantage in radio frequency transmission systems due to non-linearities of the power amplifier. It is demonstrated theoretically and by means of an experimental system that the high PAR in OFDM can be exploited constructively in visible light communication to intensity modulate LEDs. It is shown that the theoretical and the experimental results match very closely, and that it is possible to cover a distance of up to one meter using a single LED.)

声音反射的实现，文档里附有运行的图样，即声音反射的波形(voice reflected the realization documentation is enclosed operation of the drawings, that is reflective of the voice waveform)

提供多种路由方式，能很好对比节点间的定位效果，可以绘出节点的定位误差和节点间的连接图。(Offers a variety of routing can be a good contrast between the nodes positioning effect, you can draw the connection diagram of the the node positioning error and node.)

聚类算法 k均值 该算法简单 容易看懂 是基本的算法(kmeans clustering )

realize overlapped-add method ％[y]=overlpadd(x,h,Nfft) ％y:output sequence ％x:input sequence ％h:filter impulse response sequence ％Nfft:points of each DFT operation ％重叠相加法实现分段卷积(realize overlapped-add method% [y] = over lpadd (x, h, Nfft)% y : x% output sequence : % h input sequence : impulse response filter% Nfft sequence : DFT points of each operation% of the sum of overlapping sub-convolution Method)

First takes the last selected image Calls the images from database Applies PCA to images Compares the last selected image with database images and says if it is found at the database or not.