Rain_Attenuation

An Matlab implementation neural program

包括面积、周长、矩形度、伸长度，基于小波变换的数字水印算法matlab代码，小波包分析提取振动信号中的特征频率。( Including the area, perimeter, rectangular, elongation, Based on wavelet transform digital watermarking algorithm matlab code, Wavelet packet analysis to extract vibration signal characteristic frequency.)

说明：  求解大规模无约束最小化问题，使用信赖域算法，其中信赖域子问题使用截断共轭梯度法(The trust region algorithm is used to solve the large-scale unconstrained minimization problem, in which the truncated conjugate gradient method is used for the trust region subproblem)

This program simulates the bit-error-rate (BER) performance of OSTBC with L=4 antennas over the frequency flat Rayleigh block fading channel The code is developed for real orthogonal design, code rate 1/2 modulation- 16 QAM with gray coding resulting in 2 bits/sec/Hz.(This program simulates the bit-error-rate (BER) performance of OSTBC with L = 4 antennas over the frequency flat Rayleigh block fading channel The code is developed for real orthogonal design, code rate 1/2 modulation-16 QAM with gray coding resulting in 2 bits/sec/Hz.)

计算Erlang B,C 模型中阻塞率与输入负载随服务器数量变化的数值关系并绘图。 模拟一个M/M/k排队系统。 该资料为通信系统排队理论matlab实验内容。(Using the iterative scheme, calculate the blocking probability of the Erlang B and C model. Draw the relationship of the blocking probability and offered traffic while sever number varies. Simulate a M/M/k queue system with input parameters of λ, μ, k)

说明：  matlab 卫星N 文件、O文件读取，计算出卫星坐标和测站坐标，精度为10M左右(matlab satellite N files, O file read, calculate the satellite coordinates and station coordinates, and an accuracy of about 10M)

计算平行线耦合的奇偶模阻抗值和切比雪夫低通原型滤波器的耦合系数(caculate the parrellel coupleline odd and even resistance value and based on the Chebyshev lowpassfilter coupled cofficients)

根据弗洛伊德算法计算最短距离矩阵（准备连接矩阵、距离矩阵，可以用坐标算出）(Calculate the shortest distance matrix according to Freud algorithm (prepare connection matrix, distance matrix, can be calculated by coordinates))

说明：  蓝牙调频通信系统，为simulink形式，直接运行可用(Bluetooth FM communication systems for the simulink form, can be used directly to run)

机器人二维绘图的matlab程序，应该有二十二个字了吧。(Robot dimensional drawing matlab program, there should be twenty-two word of it.)