approx_entropy_my

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. )

作为算法实现的应用,对光子晶体光波导的电磁耦合效应进行了数值仿真研究,结果证实:波导耦合区域内不同半径比介质柱所导致的结构变化将造成耦合长度的改变,且其耦合关系曲线具有平稳区与迅变区两类不同特性的变化范围区间。(As the algorithm' s application, on the photonic crystal waveguide for electromagnetic coupling numerical simulation, results show: waveguide coupling region different than the dielectric cylinder radius of the structural changes caused by the coupling length will cause a change, and its coupling curve has a smooth area with the fast-changing area characteristics of two different range interval.)

autoregressive of conditional durations model

Design PI PID and phase controller from a transfer function using fmisearch, root geometryc place or frequency response.

一个简单的在figure中用鼠标画直线的例子。最终是想在matlab环境下编一个用鼠标画贝塞尔曲线的程序，现在正在研究中。(A simple figure using the mouse in a straight line drawn examples. Ultimately would like to matlab environment made a Bezier curve with the mouse painting process, now being investigated.)

微电网中统一电能质量调节器控制方法研究，希望对大家有用(Unified power quality conditioner control method in the micro grid research)

卡尔曼滤波在一维温度数据测量系统中的使用(Kalman filtering)

聚类分析的matlab函数,内部有详细说明(Cluster analysis of the matlab function, has a detailed description of internal)

MATLAB构建的三段比幅式距离保护模型 内涵保护模块 S函数模块 (MATLAB built three-spoke distance protection model content protection module S function modules)

用matlab编程实现的清华老校歌。属于信号与系统处理技术的问题。(Matlab programming of Tsinghua old school song. Belong to the problem of signal processing technology.)