Hamming_BER

This is a JPEG encoding & decoding program of still image. It does not use level shifting. Discrete Cosine transform (DCT) is performed both by classical & Chen s Flowgraph methods. Predefined JPEG quantization array & zigzag order are used here. RUN - LEVEL coding is used instead of Huffman coding. Compression ratio is compared for each DCT method. Effect of coarse and fine quantization is also examined. The execution time of 2 DCT methods is also checked. In addition, most energatic DCT coefficients are also applied to examine the effect in MatLab 7.4.0 R2007a. Input is 9 gray scale pictures & output is 9*9=81 pictures to compare. Blocking effect is obvious. (This is a JPEG encoding & decoding program of still image. It does not use level shifting. Discrete Cosine transform (DCT) is performed both by classical & Chen s Flowgraph methods. Predefined JPEG quantization array & zigzag order are used here. RUN - LEVEL coding is used instead of Huffman coding. Compression ratio is compared for each DCT method. Effect of coarse and fine quantization is also examined. The execution time of 2 DCT methods is also checked. In addition, most energatic DCT coefficients are also applied to examine the effect in MatLab 7.4.0 R2007a. Input is 9 gray scale pictures & output is 9*9=81 pictures to compare. Blocking effect is obvious. )

一个BP神经网的学习过程，实现预测功能。(A BPN )

实现坐标点的旋转，先将坐标移到以坐标系原点为圆心的坐标系中。(To achieve the rotation of the coordinate points。)

数值分析中 二分法查找带GUI图形界面的源码(Numerical analysis of binary searching with the source code of the GUI graphical interface)

This programs are very useful for time prediction.

分形计算的几个程序原码，可用于康托集，求解非线性方程，分形树，分形维计算，庞加莱截面描述等功能(Several fractal program source code, Cantor set can be used for solving nonlinear equations, fractal tree, fractal dimension calculation Poincare section describes functions)

1．用Matlab产生正弦波,矩形波,以及白噪声信号，并显示各自时域波形图 2．进行FFT变换，显示各自频谱图，其中采样率，频率、数据长度自选 3．做出上述三种信号的均方根图谱,功率图谱,以及对数均方根图谱 4．用IFFT傅立叶反变换恢复信号，并显示恢复的正弦信号时域波形图(1. Produce sine wave, square wave, and the white noise signal with Matlab, and their time-domain waveform display 2. FFT transform, display each spectrum, where the sampling rate, frequency, length optional data 3. RMS to make maps of the three signals, power spectrum, as well as the number of RMS map 4. Restored by inverse Fourier transform IFFT signal and displays the time domain waveforms sinusoidal signal recovery)

Matlab 数学方法介绍 基本的入门教程(Mathematical Methods Matlab basic Tutorial)

一种SSB调制与解调的MATLAB实现,其中用到了Hilbert变换(A method of SSB modulatie and demodulate using Matlab)

qam-16 modulation. Simulink.