example72

现有一个信号：x(n)=1+cos(π*n/4)+ cos(2*π*n/3)设计及各种数字滤波器以达下列目的： 低通滤波器，滤除cos(2*π*n/3) 的成分，即想保留的成分为1+cos(π*n/4) 高通滤波器，滤除1+cos(π*n/4) 的成分，即想保留的成分为cos(2*π*n/3) 带通滤波器，滤除1+cos(2*π*n/3) 的成分，即想保留的成分为cos(π*n/4) 带阻滤波器，滤除cos(π*n/4) 的成分，即想保留的成分为1+cos(2*π*n/3) 1. 用MATLAB命令butterord求除滤波器的阶数,用命令butter设计各滤波器；画出滤波器幅度和相频相应 取各滤波器的系统函数H(z)。 (an existing signal : x (n) = a cos (* n/4) cos (2** n/3) design and digital filter to achieve the following objectives : low-pass filter, filter cos (2** n/3) the ingredients that want to retain an element of a cos (* n/4) high-pass filter, a filter cos (* n/4) components, namely to retain the element of cos (2** n/3) band-pass filter , a filter cos (2** n/3) components, namely to retain the element of cos (* n/4) band stop filter, the filter cos (* n/4) components, namely to retain the ingredients for a cos ( 2** n/3) 1. MATLAB order butterord except for the band Filter, using the order of the filter design butter; paint Filter magnitude and phase frequency of the corresponding filter system function H (z).)

本程序主要通过EMD和hilbert求IMF，作出HHT归一化能量谱图（三维图），边际谱图和瞬时能量图，并做完备性验证(The program primarily through EMD and hilbert seek IMF, to HHT normalized energy spectrum (three-dimensional map), the marginal spectrum and the instantaneous energy map, and do a complete validation)

Chapter 2 and chapter 3 of digital communication system use matlab codes

matlab编程实现从东北天坐标系到地心坐标系的坐标转换，包含了资料文件。调用函数名为：ENVtoECEF，输入参数为东北天原点经纬度数据，东北天坐标点数据；输出数据是东北天坐标系下坐标点对应的经纬高数据。(matlab programming from the northeast sky coordinate system to the geocentric coordinate system conversion, including the data file. Call the function named: ENVtoECEF, input parameters for the origin of latitude and longitude data northeastern days, Northeast day coordinate data output data is northeast days coordinates of latitude and longitude coordinates of points corresponding to the high data.)

matlab 牛顿法迭代,为数值分析课上的作业,用借鉴于其他的迭代计算中.()

TD-SCDMA的物理层规范，具体介绍了信道复用和信道编码，对信道编码流程描述很清楚(TD-SCDMA standard in the physical layer, the specific details of the channel multiplexing and channel coding. right channel coding process description is very clear)

To calculate PBG for triangle lattice

matlab finite element code for solving pdes

说明：  一个MATLAB实现模糊神经网络的程序，希望对大家有帮助(A MATLAB procedure of fuzzy neural network, we want to help)

描绘曲线，看曲线收敛性,稳定的系统是在时间的无限长时，曲线收敛，证明系统稳定，曲线发散，证明系统不稳定(we can look at zhe line and realize it is stable or not!)