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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.

the fast autocorelation function matlab code, used for basicallly pitch extraction and thus is extremely useful

点目标成像程序，程序简洁，效果较好，具有一定的使用价值(ISAR image)

本程序画出了时间序列下的各变量变化图，得到混沌性质，从而在区域内对变量进行取值，达到模拟出混沌的目的(This procedure draws the time series of each variable changes in plans, the chaotic nature, and thus in the region of variable values, to simulate the purpose of Chaos)

MATLAB实现最速下降法，希望大家用得上！！！！！！！！！(MATLAB implementation steepest descent method, I hope everyone useful! ! ! ! ! ! ! ! !)

合成孔径雷达影像滤波程序，用matlab编写，在去除图像中的斑点（乘性噪声）方面有一定的作用。(Synthetic aperture radar image filtering process, using matlab prepared to remove the image spots (multiplicative noise) has a certain role.)

模式识别中c均值法的matla算法实现 老师布置的作业我昨晚了 上传共享一下(Pattern recognition method matla c means algorithm teacher assignments upload to share what I had last night)

当目标高速运动时，用keystone算法校正距离走动，本程序给出了keystone算法程序(keystone transform can correct the envelop migration,the program gives the the keystone algorithm program)

section ZF precoding for communication systems. Regards

最大似然法德matlab仿真程序，用在ofdm系统中很好！！！与大家一起享用(Maximum Likelihood France and Germany Matlab simulation program used in ofdm system good! ! ! Together with everyone to enjoy!)