zhoujie_program

BER Rayleigh made in Matlab

最优化计算中一维无约束极值问题，适合初学者入门学习！(Optimize the calculation of one-dimensional unconstrained extremum problem, suitable for beginner to learn!)

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.)

c++的各种例子，例如继承，重载，容器，迭代子，vector，多态，模版，虚函数，友元，指针，作用于等等，超级多的例子，每个例子都是用中文标识，对学习c++的朋友很有帮助。(Various examples of c++, such as inheritance, overloading, containers, iterators, vector, polymorphism, templates, virtual functions, friend, pointer, acting, etc. Super Multi example, each of the examples are used to identify Chinese for learning c++ helpful friends.)

说明：  a method towards Genetic Algorithm

Bisection method matlab

truetime 的初始化文件，安装时重要的系统变量设置，进行c语言和matlab联合编程的结合点(TrueTime initialization files, system variables when installing the important settings, combination of C language and MATLAB programming)

RAVE – DataMirrorSection (passo a passo)

维特比译码，采用软件的方法实现维特比译码，仿真效果很好。(Viterbi decoding using the software Viterbi decoding, the simulation results is very good.)

比较好的连续潮流算法，结构比较清楚，收敛性能好(Good continuation method)