fft-dft-and-ploting

本程序用matlab仿真卫星及轨道，希望对大家的学习有所帮助(This procedure simulation using matlab and satellite orbit, and they hope to be helpful to study the U.S.)

histogram based code for image retrival

over shoot rise time in matlab

目前我见过分析最为全面的2PSK系统的基于MATLAB的仿真分析M文件(At present I have seen of the most comprehensive 2PSK system simulation analysis based on MATLAB M file)

一种分帧算法 比较简单基础 基于matlab 请大家分享(A simple algorithm based on sub-frame based on matlab)

SAR成像很好的学习资料，希望大家喜欢。(The SAR imaging learning materials, hope you like)

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.)

to get the theoretical and simulation plots for 4 16 64 QAM plots for AWGN channel

摄影测量后方交会、前方交会、相对定向、绝对定向、光束法平差等。 (Photogrammetric resection, forward intersection, relative orientation, absolute orientation, bundle adjustment and so on.)

max_min求最大值最小值及平均值和乘法(max_min minimum and average maximum demand and multiplication)