ExtendedKalmanFilter

led model by state space equations

已知圆弧起点与终点（角度表示）、圆心坐标，半径，如何用matlab画圆弧(how to draw circle)

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. )

二维，ＦＤＴＤ，ｐｍｌ，ｍａｔｌａｂ语言。(Two-dimensional, FDTD, pml, matlab language.)

说明：  基于最小二乘法的曲线拟合，m文件带有仿真数据(Based on least squares curve fitting, m file with the simulation data)

说明：  matlab高阶谱分析工具箱，用于高阶谱的分析(very usefull )

用matlab画齿轮齿廓的，只要几个参数即可，具体看程序，很简单，一看就懂。(matlab build gear shape)

MATLAB进行模糊统计，得到模糊分布(隶属函数)近似解析表达式(MATLAB fuzzy statistics, get fuzzy distribution (membership function) approximate analytical expressions)

The arclength of a general curve in 2 or more dimensions, using discrete points along the curve

直接序列扩频的系统仿真，适合理解原理，很实用(Simulation of direct sequence spread spectrum system for understanding the principle, it is practical)