mllicheng2_bianshi

this document is about baum-welch algorithm

一个用于计算时间的界面，可根据需要进行修改(An interface for the computing time can be modified as needed)

qpsk的调制解调源码，注释详细。功能正常。很适合学习调制解调的人.文件包含： qpsk_mod_demod.m(qpsk mod and demod procedure qpsk_mod_demod.m)

常用二极管的七种用法，里面有详细的介绍和分析。(Seven kinds of usage about diode，there is a detailed introduction and analysis.)

一个接地电网simulink模型，可以直接运行(A grounding grid simulink model can be run directly)

均匀线性阵列的波束成形.波束成形入门级代码(Beamforming uniform linear array)

利用MATLAB语言仿真截断正态分布函数(Simulation using MATLAB language truncated normal distribution function)

to extract the pitch

Abstract：Noise frequency modulation(FM)jamming。which belongs to blanket jamming。is already become the main form ofnoise jamming at present。because the wideband was gained by it．Tne spectnlnl ofnoise FM jamming is analyzed by time domain autocorrelation method in this paper．It’S jamm g peculiarity and几out— putting signal’S jamming peculiarity ale explained．At last，these time series models ofnoise FM jalllIIling sig— nal and几outputting signal ale built．(Abstract: Noise frequency modulation (FM) jamming. which belongs to blanket jamming. is already becomethe main form ofnoise jamming at present. because the wideband was gained by it. Tne spectnlnl ofnoise FMjamming is analyzed by time domain autocorrelation method in this paper. It S jamm g peculiarity and several out-putting signal S jamming peculiarity ale explained. At last, these time series models ofnoise FM jalllIIling sig-nal and a few outputting signal ale built.)

HHT精华讨论，对运用ＨＨＴ进行数据分析时遇到的问题有详细的解答，是学习ＨＨＴ不可或缺的资料(HHT essence discussion, this paper analyzed the data using HHT is there detailed solution to the problems encountered in the process of, is indispensable to study HHT data)