Chapter-3

说明：  QPSK解调的 MATLAB 实现 包括原chengxu和仿真(QPSK demodulation of the MATLAB implementation)

matlab 蚁群算法 源程序，里面有多个m文件(ant colony algorithm matlab source code, there are several m-files)

本程序在matlab环境下，基于粒子群算法对pid控制器进行优化控制,从而完成性能更优(The program in matlab environment, based on particle swarm optimization algorithm pid controller to control, thus completing the better performance)

用Euler法和改进Euler法求下列常微分方程的初值问题的数值解(Euler method and the improved Euler method seeking the following ordinary differential equations numerical solution of the initial value problem)

OFDM/OQAM调制解调源码，另外增加了上变频部分，中心频率30KHz(OFDM/OQAM modulation and demodulation ，also include up frequency to 30Khz)

说明：  function [Sx,f,alpha] = Sa(s,fs,M,N,read_f,del_f) 计算信号的循环谱 [Sx,f,alpha] = Sa(s,fs,M,N,read_f,del_f) 输入： s 序列 fs 采用频率 M 滑动频率窗长 N fft计算点数 read_f 可视频率（一般为载频的整数倍） del_f 可视频率间隔 输出： Sx 信号的循环谱 f 频率轴 alpha 循环频率轴(Cyclosationary Spectrum)

基于MATLAB的确定性系统的分岔与混沌的设计程序(MATLAB-based deterministic system, bifurcation and chaos in the design process)

householder transformation

一款基于MATLAB的无线界面控制程序，可以远程控制机器人的运行(A MATLAB-based wireless interface control program, can remotely control the robot s operation)

LTE标准的turbo码编译码仿真，使用MAP译码算法。(LTE standard turbo code simulation, the MAP decoding algorithm has been used.)