bnb20

dpcm codification matlab code

facial expression in matlab

matlab中的多项式运算 huanyingxiazai (polynomial operator in Matlab welcome to down this work)

根据给定的时间序列求混沌参数的互相关算法。(Cross-correlation algorithm according to the sequence of a given time requirements chaos parameter.)

遗传算法的算法实例，我是一个初学者，通过研究这些现成的代码，感觉对自己挺有帮助(It is helpful for those who study MATLAB first time)

说明：  QC-LDPC基矩阵H的构建方法及MATLAB实现，具有详细解释(Various encoding and decoding methods of LDPC)

hopping code in digital communication systems

The Vigenère cipher is a method of encrypting alphabetic text by using a series of different Caesar ciphers based on the letters of a keyword. It is a simple form of polyalphabetic substitution.Though the cipher is easy to understand and implement, for three centuries it resisted all attempts to break it this earned it the description le chiffre indéchiffrable (French for the indecipherable cipher ). Many people have tried to implement encryption schemes that are essentially Vigenère ciphers.[3] Friedrich Kasiski was the first to publish a general method of deciphering a Vigenère cipher.Unlike the monoalphabetic ciphers, polyalphabetic ciphers are not susceptible to frequency analysis, as more than one letter in the plaintext can be represented by a single letter in the encryption.

运用误差矢量幅值法(EVM)对信号的载噪比进行估计(Method using error vector magnitude (EVM) of the carrier signal-to-noise ratio estimate)

finds the ratio between number of local extrema of a signal (vector) to the size of the signal (vector)