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QPSK 在瑞利信道下的调制解调的matlab仿真实现，可显示输入数据的波形表示，I支路和Q支路以及调制前、解调后、接收的波形、星座图等(QPSK modulation in Rayleigh channel demodulation matlab Simulation, the waveform can be displayed, said input data, I branch and Q branch, and before modulation, demodulation, the received waveform, constellation, etc.)

各种滤波器的设计，包括高斯低通滤波器。hilberrt带通滤波器，插值滤波器等等。(Various filter design, including Gaussian low-pass filter. hilberrt band-pass filter, the interpolation filter and so on.)

ofdm在awgn信道下的仿真程序ber，snr图形(In awgn channel ofdm simulation program ber, snr graphic)

This is an example of creating an MSK signal

LSBM_STEGO IS A FILE DESIGN TO EMBED THE MESSAGE WHICH IS NOT LIKELY TO BE DISCOVER BY OTHERS INTO THE COVER

FFT的MATLAB仿真实验，了解关于MATLAB的一般过程，及波普分析方法(FFT MATLAB simulation experiments to understand the general process of MATLAB, and pop analytical methods)

1.实验目的：绘制分形图案并分析其特点。  2.实验内容：绘制Koch曲线、Sierpinski三角形和树木花草图形，观察这些图形的局部和原来分形图形的关系。  3.实验思路：利用函数反复调用自己来模拟分形构造时的迭代过程，当迭代指标n为0时运行作图操作，否则继续迭代(1. Purpose: Draw fractal patterns and analyze their characteristics. 2. Experiment: Draw Koch curve, Sierpinski triangle graphic flowers and trees, observe the relationship between the local and original graphics fractal graphics. 3. Experiment idea: using the function calls itself repeatedly to simulate the iterative process when the fractal structure, when the iteration index n is plotted 0:00 run, otherwise continue iterating)

character recongnition

说明：  一本关于matlab的书籍，对初学matlab的学者很好的指导书(A book on matlab, matlab scholars on a good beginner guide book)

spectral analysis of speech signal