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matlab环境下，函数的傅立叶变换和反变换(matlab environment, the function of the Fourier transform and inverse transform)

说明：  现代通信系统(MATLAB)版本，作者：普罗克斯等著，刘树棠译。本书采用MATLAB作为“虚拟实验室”，给出了解决“现代通信系统”课程中涉及的各方面问题的分析思路、方法、MATLAB脚本（或程序）文件和处理结果示例(Modern communication systems (MATLAB) version of: Proulx waiting, Liu Shutang translated. This book uses MATLAB as a &quot virtual laboratory&quot , presented to solve the &quot modern communication systems,&quot course involved in all aspects of the analysis of ideas, methods, MATLAB script (or program) file, and Chu Li Jieguoshili)

this code simulates a 4fuzzy PID cotroller for ball-baem system and 3 other systems.

same file contents as the priviously three already uploaded files

利用最小二乘法的原理高精度估计正弦波信号的幅值，频率和初相(The principle of using the least squares method estimated sine wave signal amplitude, frequency and initial phase of high-precision)

Lyapunov Exponents using Matlab 2014

OFDM系统，调制方式QPSK，查看星座图，分析误码率(OFDM systems, modulation QPSK, view the constellations, the bit error rate analysis)

Viscous flow in a pipe

the code uses cma for channel identification and equalization

matrix converter with induction motor