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四进制通信系统的进行蒙特卡罗仿真程序，以正交信号为基础。当均值分别等于０，０.１，１.０，２．０时完成１００００个比特的仿真并求出误差概率。绘出理论误码率和蒙特拉罗仿真的差错率并进行比较这俩个结果，并绘出每个均值情况下判决器的１０００个接受信噪比抽样(Four-band communication system to carry out Monte-Carlo simulation procedures to orthogonal signal basis. When the mean, respectively, equivalent to 10,000 completed 0,0.1,1.0,2.0 bit error probability simulation and obtained. Mapping theory and蒙特拉罗BER simulation这俩error rate and compare results, and the mean circumstances of each mapped)

说明：  基于filedII的超声成像原理、方法的研究。该程序适合filedII初级学习者。(The ultrasound imaging based filedII principles, methods of research. The program for filedII primary learners.)

attached file is matlab code

这是学习matlab的资料，还可以的，希望对大家有帮助。(This is a learning matlab information, but also hope to have everyone help.)

matlab tutorial and explication

说明：  用matlab中的FFT函数实现了正弦信号，矩形信号，和白噪声的频谱分析(FFT with matlab function in a sinusoidal signal, the rectangular signal, and white noise spectrum analysis)

利用MATLAB实现Floyd算法，可对输入的邻接距离矩阵计算图中任意两点间的最短距离矩阵和路由矩阵，且能查询任意两点间的最短距离和路由。(Floyd algorithm using MATLAB realize, can be routed to the shortest distance adjacency matrix and the distance matrix calculation map between any two points in the input matrix, and can query the shortest distance and route between any two points.)

用边缘检测的方法进行参数估计，取得了较好的效果，证明是有效的方法(Edge detection method with parameter estimation, to obtain good results, proved to be an effective way to)

Bit-Error-Rate Simulation Using Matlab

filter design pakcage matlab