vitbit-decode

应用于MATLAB中对图像的非线性变换，直方图均衡化线性，平滑滤波器(Images used in MATLAB, nonlinear transformation, histogram equalization, linear smoothing filter)

LS（Least Square，最小二乘法）算法是信道估计算法中最基本的算法之一。在MIMO-OFDM系统中，经常选择LS算法或其改进算法对信道进行估计。利用LS算法设计信道估计器，算法结构简单易于实现，且估计器不需要知道信道中各个收发天线对之间的自相关矩阵和噪声。(LS (further Square, Least Square) algorithm is one of the most basic algorithm of channel estimation algorithm. In MIMO- OFDM systems, often choose LS algorithm and its improved algorithm for channel estimation. Use of channel estimator and the LS algorithm design algorithm structure simple and easy to implement, and the estimator does not need to know in the channel between the sending and receiving antenna for autocorrelation matrix and noise. )

sensor processing in matlab

文字识别文件夹中包含图片，matlab代码，可以运行(this file includs figures,codes of matlab. it can be run well.)

BER calculation of BPSK nTap Rayleigh ISI Channel. Script for computing the BER for BPSK modulation in 3 tap ISI channel. Zero Forcing equalization with 3/5/7/9 tap is performed and the BER computed

包含了SIFT详解，对于初学图像分类，场景识别有很大帮助(Contains a detailed SIFT, for beginners of image classification, scene recognition is of great help)

This program compress and recostruct using wavelets. We can select level of decomposition(here maximum 4 levels are given) of images using selected wavelet. For eg:-wavelets can be haar, db1, db2,dmey............... Decomposition can be viewed in figure. (Please note that select 256X256 image for better result.) Then compression can performed, PERFL2 give compression score. Then reconstruction can be performed. Each decompsition we can choose different threshold values. For each threshold value we can calculate mse,psnr,pq(picture quality), bit ratio etc. To get pq install pqs function . (This program compress and recostruct using wavelets. We can select level of decomposition (here maximum 4 levels are given) of images using selected wavelet.For eg:-wavelets can be haar, db1, db2, dmey ........ ....... Decomposition can be viewed in figure. (Please note that select 256X256 image for better result.) Then compression can performed, PERFL2 give compression score.Then reconstruction can be performed.Each decompsition we can choose different threshold values . For each threshold value we can calculate mse, psnr, pq (picture quality), bit ratio etc. To get pq install pqs function.)

数字滤波的例子，巴特沃斯与切比雪夫的横向和纵向对比，及阶数分析(Digital filter example, Butterworth and Chebyshev comparison of horizontal and vertical, and the order of)

标准阵列的波束方向图的幅度等高线图：N=M=10，均匀加权。(Contour plot of uniformly weighted rectangular array)

matlab program for random noise addition