基于Matlab的多功能通信信号源仿真

A great book from Mustafa Ergen about wireless communications in LTE, WiMaX and mobile broadband with the title Mobile Boradband including WiMaX and LTE .

在一个移动通信系统中，发射信号是一个未调制的音频x(t)=cos(2πft)，其中f=f0+fi。设标称载波为f0=1GHz，并设fi =512Hz。假定移动用户在一个繁忙的高速公路上距离基站l公里处的地方，从开始从每小时60公里的速度开始，其速度（在0.01秒的时间间隔内测量）以1/2的概率随机的增加或减少1/10公里每小时。试仿真移动用户在这2s的时间间隔内所接收到的信号(及其频谱)。接收信号可以表示为： y(t)=a(t)Cos[2π(fo+f1)(t-△t)] 式中 △(t)=d(t)/c 且 a(t)=k/d2(t) 在上面的表达式中d(t)是在t时刻基站与移动用户的距离，c是光速，△(t)是传播延迟，而a(t)是信号在t时刻的衰减，并假设在这2s内a(t)是一个常数。利用复低通等效模型来进行仿真。(In a mobile communication system, the transmitted signal is an unmodulated audio x (t) = cos (2πft), where f = f0+ fi. Let nominal carrier of f0 = 1GHz, and set fi = 512Hz. Assume that mobile users on a busy motorway station l kilometers place, starting the beginning of 60 kilometers per hour, the speed (measured in 0.01 second interval) to increase the probability of a random 1/2 or reducing 1/10 km/h. Simulation test signal which the mobile subscriber in the 2s time intervals of the received (and its spectrum). The received signal can be expressed as: y (t) = a (t) Cos [2π (fo+ f1) (t- △ t)] Where △ (t) = d (t)/c And a (t) = k/d2 (t) In the above expression, d (t) at time t is a base station and a mobile user s distance, c is the speed of light, △ (t) is the propagation delay, and a (t) is the attenuation of the signal at time t, and assuming that 2s within a (t) is a constant. Using complex low-pass equivalent model for emulation.)

航迹规划的典型算法,是一种实时地三维航迹规划，已经做过了航迹平滑(aStar algorithm for trajectory tracking)

a weighted algorithm which can be useful for all kind of estimation

steganografy using Least significant bit

单车道matlab元胞自动机代码，超级好用，求通过，求下载(Lane cellular automaton matlab code)

用偏最小二乘回归法对多自变量和多因变量问题求解(The independent variables and the dependent variable problem solving by partial least squares regression method)

说明：  利用normrnnd函数生成1000个标准正态分布随机数，绘制频率直方图和经验分布图(Using normrnnd function to generate 1000 standard normal distribution random numbers, and draw frequency histogram and empirical distribution map)

Direct torque control simulink

基于matlab,利用AMDF方法检测语音的基音周期(Based on matlab, the use of methods AMDF Pitch Detection of Speech)