Simulation-of-hybrid-systems

一个四用户的扩频通信系统，扩频增益为N=16，采用Walsh码进行直接序列扩频，BPSK调制，无线信道为AWGN信道。在接收端进行解扩，解调，判决，通过仿真得到其中一个用户的误比特率与信噪比的仿真结果。(A four-user spread spectrum communication system, spreading gain for N = 16, using Walsh code Direct Sequence Spread Spectrum, BPSK modulation, AWGN channel for the wireless channel. At the receiving end for despreading, demodulation, judgments, through the simulation to be one of a user' s bit error rate and SNR of the simulation results.)

说明：  Mathematical models- choice of model class LS

MATLAB Garch using example

计算pearson相关系数的函数,hen xiang xi(ji suan pearson xiang guan xishu de han shu)

Some New Indexes of Cluster Validity

关于DSCDMA的仿真，首先对信号调制，然后扩频，接收端解扩解调。包含单用户和多用户下的的误码率曲线。(On the DSCDMA simulation, firstly modulate signals , and then spread spectrum, the receiver de-spread demodulation. Including single-user and multi-user under the BER curve.)

一则3维带理想导体边界的FDTD算法实例，老外编写的，注释很明了(A 3-D with a perfectly conducting boundary FDTD algorithm instance, foreigners written comments are clear)

本程序对语音信号加上不同长度的汉明窗，研究不同的窗长对语音信号的自相关函数的影响(Hamming window, the application on the speech signal plus different lengths study different window length of the autocorrelation function of the speech signal)

说明：  观察数据长度N的变化对DTFT分辨率的影响 这几个程序是老师写的 对于理解DTFT有很大帮助(Effect of observation data length N on DTFT resolution These programs are written by the teacher and are very helpful for understanding DTFT.)

定位曲线峰值大小及峰值点横坐标,并对结果进行图形化标示。(localization of the peak horizontal ordinate and amplitude for a curve)