DQPSK

说明：  通用viterbi译码程序,通过改变不同的参数（比如回朔深度），可以进行不同的viterbi译码，(viterbi decode )

this code finds out the array factor of ULA

matlab白黑度测试代码，，输出时间响应方程(White blackness matlab test code, the output time response equation)

The function alphaBetaFilter implements a generic algorithm for an alpha-beta filter that is a linear state estimation for position and velocity given an observed data. It acts like a smoothing. Also closely related to Kalman filters and to linear state observers used in control theory. Its principal advantage is that it does not require a detailed system model.

adaboost code for training and testing see instructions inside

Rife是一种频谱校正方法，分别给出了以上算法的Matlab程序并且画出了图形。( Rife is a spectrum correction method given above algorithm Matlab program and draw graphics.)

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. )

用Kalman滤波方法估计目标航迹的Matlab源程序(Kalman filtering method using the estimated target track of Matlab source)

模拟多小球弹性碰撞,很有趣的一个程序，跟物理有关，不妨看看~(Simulation of multi-ball elastic collision，let us learn it together.)

动态规划网络，包括执行网络和评价网络，采用BP网络实现。(ADP network, including execution network and evaluation network, is implemented by BP network.)