paper_4

详细阐述了设计通信网络仿真环境里的各个参数，如带宽，延迟，掉包率，等等因素，这里的网络包括了WLAN，3G以及各种业务所需的基本条件(Detail the design of communication network simulation environment, all parameters such as bandwidth, delay, substitution rate, among other factors, where the network includes a WLAN, 3G, and the basic conditions required for various services)

光脉冲在光纤中传输时受到二阶色散作用，求解二阶色散方法(pulses in optical fiber transmission by the second-order dispersion role for second-order dispersion methods)

这是一个双通道完全重构滤波器设计matlab源代码(This is a dual-channel perfect reconstruction filter design matlab source code)

一、观察序列频谱，观察信号通过系统后波形与频谱的变化。 系统函数，根据正准型结构（canonical form）编写样本处理算法。 (First, observe the sequence of the spectrum, observing the signal waveform and frequency spectrum through the system after the changes. System function, according to canonical structure (canonical form) the preparation of a sample processing algorithm.)

对图形图像进行处理，使图形图像配准，更为准确(The graphic image processing, the graphics image registration, more accurate)

复数信号的fastICA算法.希望对大家有所帮助哦(plural signals fastICA algorithm. We hope to help oh )

DVB-T 2k模式定时估计Matlab仿真。重新修改了程序。包括DVB-T信号产生，瑞利多径信道衰减，高斯噪声加入。 定时估计的粗定时用极大似然法，细定时用分散导频。首先确定导频模式，再通过相邻导频相关确定定时偏差。此方法适用于瑞利多径信道，高斯信道，也适用于莱斯多径信道。 信道估计利用DVB-T导频，LS估计，导频位置的时间插值，非导频位置频率插值，非常有效。 该程序经过多次运行无误，不足之处在于变量使用不规范，注释简单，读程序很费劲哈。 其特点是均采用经典算法，简单有效为主，对初学者很有帮助滴。(DVB-T 2k signal, timing estimation, channel estimation)

EMD 算法，消除信号趋势项，可以作为信号预处理的部分(Part of the EMD algorithm to eliminate the signal trend term, can serve as a signal preprocessing)

升余弦滚降系统的源程序 matlab程序示例简要示范(Raised Cosine system source code matlab brief demonstration program examples)

说明：  Mixed frequency vector autoregressive model use in MATLAB2018b