PCMbianma

无线传感器网络定位用到的无线传输模型 Regular Model, Logarithmic Attenuation Model, DOI Model, RIM Model (Wireless sensor network localization using wireless transmission model, Regular Model, Logarithmic Attenuation Model, DOI Model, RIM Model Achieve functional distance and transmission attenuation swap ~~~~~~~~~~~~~~~~~~~~~~Regular Model~~~~~~~~~~~~~~~ In this model, the radio range is a circle ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ReceivedSignalStrength=SendingPower-PathLoss e.g, RSS=Pt-Pl(d0)-10*η*log10(dist/d0) Pt:transmit power pl(d0):the pass loss for a reference distance of d0 ηis the path loss exponent above parameters are saved in ../Parameters_Of_Models.mat dist:distance between sender and receiver(m) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ typical value:Pt=0-4dBm(max),Pl(d0)=55dB(d0=1m),η(2~4)=4(indoor,outdoor) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~Logarithmic Attenuation Model~~~~~~~~~ In this model, the radio range is a circle ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ReceivedSignal)

设计一个数字滤波器，在频率低于 的范围内，低通幅度特性为常数，并且不低于0.75dB。在频率 和 之间，阻带衰减至少为20dB。 (1)试求满足这些条件的最低阶Butterworth滤波器。(Design a digital filter, in the range of frequencies below the low-pass amplitude characteristic is constant, and not less than 0.75dB. Between the frequency and stop-band attenuation of at least 20dB. (1) Determine the lowest-order Butterworth filter to meet these conditions.)

本书以MATLAB R2012a为编写基础，系统讲解MATLAB基本环境和操作要旨；分章阐述符号计算、数值计算、计算结果可视化及编程精要；选例展现MATLAB精华工具SIMULINK的功能级和元器件级仿真能力；范例剖析MATLAB版面编辑器的用法和图形用户界面的制作要领；简扼勾画MATLAB和WORD集成一体的Notebook环境。(This book is written in MATLAB R2012a based system to explain the basic MATLAB environment and operating gist sub chapter on symbolic computation, numerical calculation results visualization and programming essentials selected cases demonstrate functional level and component-level MATLAB SIMULINK simulation tools cream ability layout editor MATLAB analysis paradigm production essentials usage and graphical user interface Jane briefly outline one integrated MATLAB and WORD Notebook environment.)

说明：  计算一个方柱的散射的波形，并求其RCS。方柱的网格总数是N=500个，时间步为1200步。网格尺寸为lamda/18,时间间隔是ddx/2*c，c为光速。脉冲源位于中心。方柱边长为7*lamda。并与相同尺度的球的散射场进行对比(Calculate the scattered waveform of a square column and find its RCS. The total number of grids of the square column is N=500 and the time step is 1200 steps. The grid size is lamda/18, the time interval is ddx/2*c, and c is the speed of light. The pulse source is at the center. The side of the square column is 7*lamda. And compare the scattering field of the ball of the same scale)

compute a ROC curve hope you will like it

MATLAB写的拖拉机游戏，有志学习MATLAB的请进(Written in MATLAB tractor games, who are interested to learn MATLAB to Come)

Comparizion of BER for STBC and STTC systems

matlab 的基本操作书籍，对初学matlab很有用，很值得推荐(The basic operation matlab books, matlab very useful for beginners, it is worth recommending)

基于目标红外特征的图像分割方法为区域生长法(Image segmentation method based on target infrared image segmentation method for region growing method)

说明：  Accumulator-Based Raptor Encoding and Decoding