Cellulartelecommunicationssystem

说明：  伪随机码或称PN码，是扩频通信中不可缺少的一种序列。扩频通信，简单的说来就是通过一组相关性很强的伪随机序列，使原有的信号按照伪随机序列的特性出现。从波形上看，原有信号完全淹没于随机的噪声中，达到隐藏信号和抗干扰的目的。接受方只要有相同的伪随机序列，就可以通过伪随机序列很强的相关性将信号还原出来。而m序列，是扩频系统中最长用的伪随机序列。下面的代码就是基于matlab的生成m序列的代码，通过改变初始多项式的值，就可以生成不同阶数的m序列。(Pseudo-random code or PN code, spread spectrum communication is indispensable to a sequence. Spread spectrum communication, a simple to say that the adoption of a group of highly related to pseudo-random sequence, so that the original signal in accordance with the characteristics of pseudo-random sequence there. From the wave point of view, the original signal completely submerged in the random noise to hide the purpose of signal and interference. As long as the recipient has the same pseudo-random sequence, the pseudo-random sequence can be a strong correlation to restore the signal out. And m sequence spread spectrum system is the longest of the pseudo-random sequence used. The following code is generated based on m sequences of matlab code, by changing the value of the initial polynomial, we can generate a different order of the m sequence.)

main_spheretoML是主程序，性能达到最大似然NL检测，调用了spheredecodetoML和spheredecodeinftoML两个子程序(sdinf ml)

8psk的实现，观察星座图，频谱以及眼图(8psk)

说明：  利用BP神经网络进行字符识别的系统源码，能进行有效数字字符识别。(BP neural network Character Recognition system source code, can be effective digital character recognition.)

输入抽奖号码范围，程序自动产生随机号码，为公平随机长生，前5次为测试号码，第6次为中将号码。(Enter the draw number range, the program automatically generates a random number, random longevity for the fair, the first 5 times for the test number, as will the 6th number.)

使用matlab实现信号发生器以及电子琴(A basic signal generator &digital piano based on Matlab)

explains bilinear transform method, and impulse invariance method for IIR filter design

程序仿真MS（移动台）在分布式MIMO系统中（含有六个天线簇）的信噪比随距离的变化(Process simulation MS (mobile station) in a distributed MIMO system (with six antenna clusters) of the signal to noise ratio changes with distance)

使用matlab的simulink工具 仿真LTE中的Turbo编码器(Simulating the Turbo_encoder in LTE via the simulator of matlab )

直流驱动电机的matlab仿真文件，可以直接仿真结果(DC drive motor matlab simulation files, simulation results can be directly)