A-methog

说明：  用MATLAB编写的运用Monte Carlo method数值积分的实例程序。可供初学者参考学习！(TETRAHEDRON_MONTE_CARLO is a MATLAB library which estimates the integral of a function over a tetrahedron using the Monte Carlo method. The library makes it relatively easy to compare different methods of producing sample points in the tetrahedron, and to vary the tetrahedron over which integration is carried out. )

此为雷达对抗的基本知识.对初始学习的人有一定的帮助.(This is the basic knowledge of radar confrontation. For the initial study were certainly helpful to them.)

This code is in geophysics field.

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. )

流水线ADC信噪比测试程序,最后一级flash位数可调，可进行SNDR和SFDR的测试(SNDR test for pipelined ADC)

关于信号噪声比的MATLAB算法实现，可仿真信号噪声比(On the realization of signal to noise ratio of MATLAB algorithm, the simulation of signal to noise ratio)

光纤模式容量，以及归一化。并用此对单模光纤进行模式分析(Fiber mode capacity, and normalization. The mode analysis of single mode fiber is also used.)

通信原理的matlab仿真实验四进制的相位调制(Communication principle of matlab simulation quaternary phase modulation)

matlab关于对图形梯度的一般计算，很简单的一个小算法！(Matlab graphics gradient on the general terms, a very simple algorithm for a small!)

MATLAB Code to observe the variations in q-axis and d-axis stator currents with change in stator voltage for a three phase induction motor