MATLAB7.0

关于车辆声音信号的滤波、能量以及频谱分析(Voice signals on the vehicle filtering, spectral analysis of energy and)

QAM PSK 信号的调制星座图代码,实现调制信号的星座图显示和比较(the code of QAM&PSK Signal modulation constellation diagram )

说明：  一个用纯C语言编写的GABOR 变换源码，我在网上找了很久也没找到，只好自己根椐matlab版源码写了一个源码。(A pure C language source code written in GABOR transform, I am looking for a long time on the Internet had not found, had noted in their written a matlab source code version of source code.)

LMS Adaptive Filter Matlab Exercise

关于视频质量评测内容，宏块级的SSIM值计算(Video quality evaluation on the contents of the macro block level SSIM value)

8ASK系统仿真，包括调制和解调。相干解调和非相干解调(8ASK system simulation, including the modulation and demodulation. Coherent detection and non-coherent demodulation)

it is matlab source code implemeted in Matlab 7.6. this is utilized in matlab.

Data Encryption by Matrix Multiplication We will only use numbers 0 to 26 for the encryptive mathematics operation. Numbers from 1 to 26 are for letters from A to Z and 0 is for all non-letter characters. To minimize usage of numbers, all letters are converted to upper case. The original message is converted to number array according to the ASCII table and minus 64. We partition whole array into blocks of 8 numbers. The last block may be added several zeros. Then multiply each block by the an 8x8 matrix A which is invertible in Z27 to get cipher data. The decryption is the same process except to use its inverse matrix B. For good visual reading, we convert all non-letter characters to under score for the decryption.

本书将通信技术用代码的形式表现出来，读者可以通过代码来加深对理论知识的理解。(This book will use the code shown in the form of communication technology, the reader can through the code to deepen the understanding of theoretical knowledge. )

用FEM，有限元法解决电磁场中的相关问题，二维，三维，时域等一系列东西，佷用参考价值(Using FEM, finite element method to solve issues related to electromagnetic fields, two-dimensional, three-dimensional, time-domain and a series of things, Hen with reference value)