gfft

In his 1960 famous publication (“A new approach to linear filtering and prediction problems”, Trans.ASME J. Basic Engineering., vol 82, March 1960, pp 34-45), Rudolf Kalman based the construction of the state estimation filter on probability theory, and more specifically, on the properties of conditional Gaussian random variables. The criterion he proposed to minimize is the state vector covariance norm, yielding to the classical recursion : the new state estimate is deduced from the previous estimation by addition of a correction term proportional to the prediction error (or the innovation of the measured signal).

code for coocurrence matrix

matlab 编的瑞利信道仿真源码，对研究信道很有用(hgajdjkjhakhdkhakjlkjlka)

说明：  DS算法程序和一些例子，有兴趣的可以下载下来验证一下(DS algorithm procedure and some examples are interested can download to test)

Median Filtering for background subtraction

主要介绍了matlab的一些简单的命令，和它的功能以及使用方式，非常适合初学者。(Matlab introduces some simple commands, and its features and use, ideal for beginners.)

demo ofdm using matlab

说明：  输入一串字符，统计其中各种字符：大小写字母、数字、空格、其他字符的个数(input string of characters, statistics on various characters : uppercase and lowercase letters, numbers, spaces, a number of other characters)

ldpc码纠错程序，对传输过程的错误进行自动检错(LDPC code error correction procedures, on the transmission error for automatic error detection)

给定2个点坐标，计算其连线与水平方向的夹角，夹角范围[0,2*pi](failed to translate)