FFT_Audio_Watermark_demo

循环谱密度函数matlab代码，介绍清楚详细，值得借鉴，好东西(Cyclic spectral density function matlab code, clear and detailed description, to be learned, good things)

粒子群算法，很好用的，请大家多多支持，一定要学的好的东西，对我们的大学生活有很好的帮助(PSO, a very good use, please support, we must learn good things, our universities have a good life with the help of)

通信原理课程设计，matlab仿真-BPSK信号，方便大家，方便自己(communication principle curriculum design, Matlab simulation-BPSK signals to facilitate, convenience)

Thi for image processing using matlab

建立了超临界二氧化碳布雷顿循环的特定工况下的循环代码(A cyclic code for a supercritical carbon dioxide Brayton cycle under specific conditions has been established.)

统计区域合并分割算法，包含实际图像处理程序，能够直接编译运行。(statiscal region merging,which can be used directly to process the image segmentation)

说明：  MATLAB程序实现图像增强、图像去噪等图像处理。(Image Enhancement and Image Denoising)

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.)

MATLAB通信仿真与应用，许多出于工程实践的例子，既有基础知识又有许多实际分析和程序(MATLAB simulation and application of communication, many examples of engineering practice for both basic knowledge and analysis of many practical and procedural)

particle filter in matlab for SMC sequential Monte Carlo