emd_improve

利用随机共振原理检测弱信号。a_b_f.m为主程序(Use of the principle of stochastic resonance detection of weak signal. a_b_f.m-based procedures)

摘要:正交频分复用(OFDM)是第四代移动通信的核心技术。该文首先简要介绍了OFDM基本原理,重点研究了理想同步情 况下,保护时隙(CP)和不同的信道估计方法在高斯信道和多径瑞利衰落信道下对OFDM系统性能的影响。在给出OFDM系 统模型的基础上,用MATLAB语言实现了整个系统的计算机仿真并给出参考设计程序。最后给出在不同的信道条件下,保 护时隙、信道估计方法对OFDM系统误码率影响的比较曲线,得出了较理想的结论。 (O FDM is the key techno logy of 4G in the field of mobile comm unication.In this article O FDM ba sic p rinc ip le is briefly in troduced.Then,the influence of CP and d iffe rent channe l e stim a tion on the system pe rfo rm ance is emp ha tica lly analyzed respectively in Gauss and R ayle igh fading channe ls in the cond ition of ideal synchronization.B e sides,based on the given system mode l O FDM system is compu te r sim u la ted w ith MA TLAB language and the refe rentia l design p rocedure is given.Fina lly,the B ER cu rves of CP and channe l e stim ation a re given and comp ared.The conclusion is sa tisfac to ry. )

维纳滤波维纳滤波维纳滤波维纳滤波维纳滤波维纳滤波维纳滤波(Wiener filterWiener filter)

prediction - neural network code

基于人工神经网络的常用数字信号调制，模式识别中的bayes判别分析算法，一个很有用的程序，有PMUSIC 校正前和校正后的比较，滤波求和方式实现宽带波束形成，相关分析过程的matlab方法，利用自然梯度算法。( The commonly used digital signal modulation based on artificial neural network, Pattern Recognition bayes discriminant analysis algorithm, A very useful program, A relatively before correction and after correction PMUSIC, Filtering summation way broadband beamforming, Correlation analysis process matlab method, Use of natural gradient algorithm.)

哈夫曼树：利用哈夫曼编码进行通信可以大大提高信道利用率，缩短信息传输时间，降低传输成本(Huffman tree)

harris角点检测。使用米粒图片可对角点的地方加入标记像素加以显示(harris corner detection)

说明：  AP聚类算法，亲测可用，可以很快分别不同类别(AP clustering algorithm, pro-test available, can quickly separate different categories)

介绍Matlab PID 的一本不错的书(Matlab PID introduction of a good book)

这是讲凸优化与非线性优化的很好的书。国外大牛力作，做移动通信、金融、运筹的同学可好好看此书(This is a book on convex optimization and non-linear optimization which contains many detailed examples. It can be useful for Who are major in wireless communication,financial and operation research)