spectrul

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. )

matlab工具箱（统计工具箱函数 优化工具箱函数 样条工具箱函数 偏微分方程数值解工具箱函数 ）(Matlab Toolbox (Statistics Toolbox function optimization toolbox function spline function PDE Toolbox Numerical Solution Toolbox functions))

Practical Genetic algorithms-Haupt-2004-261s

iterative EM MAP algorithm

关于粒子群算法的一个很好的程序。欢迎大家共同学习和探讨。(Particle swarm optimization on a good program. Welcome to learn and explore together.)

报表 datareport sample code(statements datareport sample code)

MATLAB源码，preprocessing.m: preprocess the picture including:Wiener filter; meddle value filter, change a gray picture to a binary one and then get the skeleton. centralizing.m: input the source picture output the core point of the fingerprint. samfun.m: generate the sample pattern automatically, which is used to sample the fingerprint. gabor2d_sub: get gabor filter. varpic.m: calculate variance picture(MATLAB source, preprocessing.m : preprocess the picture including : Wiener filter; meddle value filter, change a gray picture to a binary one and then get the skeleton. centralizing.m : input the source picture output the core point o f the fingerprint. samfun.m : generate the sample pattern automatically, which is used to sample the fingerprint. gabor2 d_sub : get gabor filter. varpic.m : calculate variance picture)

通过遗传算法计算下列函数的最大值 f(x)=10*sin(5x)+7*cos(4x) x∈[0,10] (The following functions calculate the maximum by genetic algorithm f(x)=10*sin(5x)+7*cos(4x) x∈[0,10])

1.掌握图像滤波的基本定义及目的； 2.理解空域滤波的基本原理及方法； 3.掌握进行图像的空域滤波的方法。 (1. Image filtering grasp the basic definition and purpose; 2. Understanding of spatial filter the basic principles and methods; 3. master images of the spatial filter method.)

Locally weighted regression (LWR) is a memory-based method that performs a regression around a point of interest using only training data that are ``local to that point. One recent study demonstrated that LWR was suitable for real-time control by constructing an LWR-based system that learned a difficult juggling task.