DFT-and-Antinotch-for-F56F11.4

Construct the short length of QC LDPC codes without girth 4 and girth 6(The Program to construct the short length of QC LDPC codes without girth 4 and girth 6 Copyright (C) Yang XIAO, Jun FAN, BJTU, July 26, 2007, E-Mail: yxiao@bjtu.edu.cn. This program presents an approach [1] for constructing the short length of LDPC codes with girth 8. First, we design 3 submatrices with different shifting functions given by our schemes, then combine them into a matrix according to our approach, finally, expand the matrix into a desired parity-check matrix using identity matrices and cyclic shift matrices of the identity matrices. The simulation results in AWGN channels show that the codes which can be obtained by the generator matrix derived from this check matrix for encoding the random information bits are as good as random LDPC codes [1]. Ref: [1] J. Fan, Y. Xiao, “A design of LDPC codes with large girth based on the sub-matrix shifting”, IET International Conference on Wireless Mobile and Multimedia Networks Proceedings (ICWMMN 2006), (CP525), p. )

高阶谱分析工具箱（HOSA）中choices函数。(HOSA tool box s demo will call a function name choices. Copy this file to one of your MATLEB search path to fix the choices problem. )

ekf的程序，这里是将其应用于目标跟踪方面(ekf s programme ,it s fitted to track traget.)

Histogram of PPM image file

西安交大Malab教学视频，从入门到精通，易于学习，用时少。(Xi' an Jiaotong University Malab teaching video, from the entry to the master, easy to learn, with less time.)

TEz cut off frequency of a metallic waveguide using FDTD

说明：  FCM算法是应用最广泛的聚类分析方法之一，CFCM也是模糊数学中的一种聚类分析算法。 现在给出的这两个算法是C++代码实现的。 (FCM algorithm is the most widely used method of cluster analysis, CFCM is a kind of fuzzy clustering analysis in the algorithm. Now given by the two algorithms is the C++ code to achieve.)

说明：  混沌系统lypunov指数谱，rucklidge系统指数(Chaotic system lypunov index spectrum, rucklidge system index)

扩频系统sumlink仿真可以 将直接序列扩频(Spread spectrum the system sumlink simulation can direct sequence spread spectrum)

EOF分析，对于数据进行EOF的转换分析(EOF analysis)