legendre-and-lmz

Tm波，单峰衍射，无边界条件，适合初学者(Tm wave, single-peak diffraction, no boundary conditions, suitable for beginners)

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. )

粒子群优化支持向量机的算法，主要是用于优化两个参数(PSO LSSVM algorithm)

digital watermarking using matlab.

this is a web application for mobile collabartive learning application

matpower代码包，用于电力系统潮流计算、优化等等(matpower4.1 source code)

基于costas环路的载波同步，使收发时钟频率和相位一致，环路包括四个部分乘法器和低通滤波、鉴相器、环路滤波器和数字振荡器组成(Based on the carrier synchronization of Costas loop, the frequency and phase of the transmit and receive clock is the same. The loop consists of four parts, including the multiplier and low-pass filter, phase detector, loop filter and digital oscillator.)

三种简单的图像滤波 均值滤波 中值滤波 和winner滤波(image filter)

此程序为CDMA的MATLAB仿真程序，在不同扩频码和路径下的仿真，对学习CDMA者有一定帮助(This program of MATLAB simulation program for the CDMA, the different spreading code and path of the simulation, those who have some learning to help CDMA)

trasform program good