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基于高阶循环累积量的SQAM信号调制识别算法(Order cyclic cumulant based modulation recognition algorithm SQAM)

substitution cipher is the method of encoding in which unit of plain text are replaced by cipher text. Monoalphabetic cipher uses a fixed message over entire message.A monoalphabetic cipher uses fixed substitution over the entire message.The monoalphabetic substitution takes a letter of an alphabet and substitutes it with another letter, this way a ciphertext is generated. The way of converting is fixed. A character of the plaintext will be replaced by the same ciphertext character, during the entire ciphertext. There is no additional key. The only way of security is to keep the substitution-table secret. A popular example for the monoalphabetic substitution is the caesar cipher.

自相关程序，本程序用来求序列的自相关运算，效果不错(since the associated procedures, the procedures used for the sequence-related operations since good results)

这种方法一方面将像素的灰度值分散，可以分辨图象中比较细节的内容；另一方面，将图 象的灰度变化控制在一定范围之内，抑制了噪声的产生，较大程度上地保留了原始图象的亮度．(This approach on the one hand spread the pixel gray value, the more details you can identify the contents of the image the other hand, the image gray scale control in a certain range, suppress noise generation, a greater degree preserved on the original image brightness.)

信号处理中波束形成时各种加权矩阵，包括长球函数权值和Kaiser加权(Beamforming signal processing for the various weighting matrix, including the prolate spheroidal functions and Kaiser weighting function)

说明：  Vector control of three phase induction motor

神经网络函数逼近源代码,函数用了sin三角函数，你也可以随便换成其他函数使用(Neural network function approximation source code, with the sin trigonometric functions, you can easily switch to other functions use)

说明：  非常好的matlab程序实现，从光盘中拷的。(Matlab program very good, from the CD-ROM copy.)

A QPSK simulation using simulink. very useful to understand the scheme at every level of QPSK modulation.

讲述的是OFDM的基本知识还有一些基本的源程序代码，适合通讯类的初学者(Is about the basics of OFDM and some basic source code, suitable for beginners communications)