Chap_5_EQ

QPSK modulation in Rayleigh channel

一个三维的matlab FDTD 程序 ,从其他地方转载的(3d FDTD)

用二维时域有限差分方法模拟了矩形波导的模场分布(the program of 2D-FDTD of retangularwaveguide)

说明：  实现了图像友RGB空间转换为Luv空间，函数以RGB图像为参数，输出Luv图像(Achieved image Friends of the RGB space is converted to Luv space, function to RGB image as a parameter, the output Luv image)

将信号映射到小波域，根据噪声和噪声的小波系数在不同尺度上具有不同的性质和机理，对含噪信号的小波系数进行处理。实质是减少剔除噪声产生的小波系数，最大限度的保留真实信号的系数。 (Will be mapped to the signal wavelet domain, according to noise and noise of wavelet coefficients in different scales with different properties and mechanism of signal with noise of wavelet coefficients for processing.Essence is to reduce the noise out of wavelet coefficients, the maximum keep the coefficient of true signals. )

将图像分为nxn的分块,之后将各分块三个颜色通道的直方图平均化,最后进行离散余弦变化,分别提取各通道低频系数(The image into nxn sub-block after block of all three color channels of the histogram equalization, and finally the discrete cosine change, were extracted from the low frequency coefficients of each channel)

说明：  卷积码的编码及维特比译码的过程，描述了系统经过卷积码编码后的性能(sss)

利用三次样条多项式插值法观察多项式的龙格现象。(Runge phenomenon observed polynomial cubic spline interpolation polynomial.)

控制程序的简要程序，供大家参考，下午 大家能提出宝贵意见(l ddddfdggfffhhhhgfgfgg)

讲述了OFDM的一些基本知识，包含框图，及OFDM的优缺点等。对OFDM有个全面认识。(OFDM about some of the basics, including block diagram, and the advantages and disadvantages of OFDM and so on. Have a comprehensive understanding of OFDM.)