sound_2

电子通信系统的建模与仿真 第6章 信号处理 6.1 MATLAB的数据可视化表达 6.2 MATLAB仿真中的信号处理 6.3 信号特征参数的计算 6.4 信号的频谱分析? 6.5 线性系统 6.6 数字滤波器设计与实现 (Electronic communications system modeling and simulation of signal processing Chapter 6 of the 6.1 MATLAB data visualization Expression 6.2 MATLAB simulation of signal processing 6.3 signal characteristic parameters for calculating the spectrum analyzer 6.4 signal ? 6.5 Linear Systems 6.6 Digital Filter Design and realize)

认知无线电，无线通信，matlab仿真代码(cognitive radio wireless communications matlab code)

说明：  编写定步长复化Simpson公式与变步长（自适应）复化Simpson公式的通用程序，并用变步长（自适应）复化Simpson公式计算π的近似值.(Complex Simpson formula)

说明：  本压缩文件提供了matlab的时间序列工具箱，内有程序详细说明(the compressed files provided Matlab Toolbox time series, which detailed procedures)

Voltage sags are one of the main problems in transmission and distribution grids with high penetration of distributed generation. This paper proposes a voltage support control scheme for grid-connected power sources under voltage sags. The control is based on the injection of reactive current with a variable ratio between positive and negative sequences. The controller determines, also, the amount of reactive power needed to restore the dropped voltage magnitudes to new reference values confined within the continuous operation limits required in grid codes. These reference values are chosen in order to guarantee low current injection when fulfilling the voltage support objective. Selected experimental results are reported in order to validate the effectiveness of the proposed control.

简单的数字图像处理程序，对新手很有帮助，内含很多简易程序(Digital image processing procedures)

在Matlab对FDTD进行仿真，并对一维，二维及三维电磁传播环境分别编写了程序(On the FDTD simulation in Matlab, and the one-dimensional, two-dimensional and three-dimensional electromagnetic propagation environment programs were prepared)

使用LDA算法对OPC人脸数据库进行识别，并判断识别的准确度(LDA algorithm using OPC face to identify and determine the accuracy of recognition)

小波包分析提取振动信号中的特征频率，实现了图像的灰度化并进一步用于视频监视控，FIR 底通和带通滤波器和IIR 底通和带通滤波器。( Wavelet packet analysis to extract vibration signal characteristic frequency, Achieve a grayscale image and further control for video surveillance, Bottom-pass and band-pass FIR and IIR filter bottom pass and band-pass filter.)

引力搜索算法源代码，matlab实现，简单易懂，适合初学者。(Gravitational search algorithm function optimization)