frequency-estimatin-method

本源代码首先实现普通的直方图均衡化，再实现灰度级之间的均匀分布，可以有效的解决直方图均衡化过程中的灰度断层现象。使得图像更加的柔和，直方图分布更均匀。(Source code first to achieve common histogram equalization, and then to achieve uniform distribution between gray levels can be an effective solution in the process of histogram equalization, gray fault phenomenon. Makes the image more of the soft histogram more evenly distributed.)

说明：  MATLAB应用百例，里面是详细的源程序(MATLAB application of 100 cases, which are detailed source)

s4vm算法，matlab 是实现半监督学习的较好的方法，能够对多种数据集进行测试，代码中包含例子，下载即可以使用(s4vm algorithm, matlab is better to achieve semi-supervised learning methods can be tested on a variety of data sets, the code contains examples that can be used to download)

协同过滤代码，由于需要，但是找不到好的代码，所以花了一天时间写的代码，希望对大家有帮助！(recommend system)

opencv里面像matlab那样显示直方图，解决了opencv没有显示直方图的缺陷。(opencv as it shows as histogram matlab to solve opencv histogram did not show defects.)

一维小波的分解和重构，可以运行，三层降维和重构，小波降噪。很实用(matlab wavelet)

说明：  文章对OFDM技术作了介绍，主要涉及OFDM技术的基本原理，信道估计，同步技术等。(Articles on OFDM technology are introduced, mainly related to the basic principle of OFDM, channel estimation, synchronization technology.)

For training two-layer perceptrons using steepest descent.

M-QAM系统的调制和解调以及在噪声条件下的误码率性能分析(M-QAM-modulation-demodulation)

基础篇介绍基本功能和操作；中级篇介绍编程和数值计算；高级篇介绍仿真(The basis of articles to introduce the basic functions and operations intermediate chapter to introduce programming and numerical computation High chapter introduced the simulation)