MatlabSpectralMethods

基于gps卫星广播星历进行的卫星预报，涉及到站心坐标系的转换(Gps satellite broadcast on the satellite ephemeris prediction, involving the heart coordinate system conversion station)

说明：  matlab 控制系统计算机辅助设计-MATLAB语言及应用(matlab control system for computer-aided design and application of language-MATLAB)

数字滤波器的matlab仿真程序滤波器为fIR型的4阶切比雪夫I型带通滤波器，通带范围为10000—15000Hz，通带左边的阻带的截止频率为8000Hz，通带右边的阻带起始频率是18000Hz，通带最大衰减为1dB，阻带最小衰减为30dB，其采样频率为50000Hz，数据点数为1024个。(Digital filter matlab simulation program)

LTE document IEEE paper very useful

说明：  EEMD：总体经验模态分解，一种改进的EMD方法。(Total empirical mode decomposition is an Improved EMD method.)

％radon transform clear all ％ N=800 n=1:N fs=200 t=n/fs x1=exp(j*2*pi*(5*t+0.5*5*t.^2)) x2=exp(j*2*pi*(5*t+0.5*15*t.^2)) x=x1+x2 ％N=length(x) ％ ambifunb(x ) ％*****************************************RAT naf=ambifunb(x) htl(abs(naf)) ％ [wh,rho,theta]=htl(abs(naf)) colormap([0,0,0]) ％ xlabel( 极半径 ) ％ ylabel( 角度 ) ％**************************************％找出峰值点的坐标,计算初始频率和调频斜率(正确) ％找出峰值点的坐标 b=max(max(wh)) [u,a]=find(wh>=0.8*b) ( Radon transformclear all N = 800 n = 1: N fs = 200 t = n/fs x1 = exp (j* 2* pi* (5* t+ 0.5* 5* t. ^ 2)) x2 = exp ( j* 2* pi* (5* t+ 0.5* 15* t. ^ 2)) x = x1+ x2 N = length (x) ambifunb (x)***************************************** RATnaf = ambifunb (x) htl (abs (naf)) [wh, rho, theta ] = htl (abs (naf)) colormap ([0,0,0]) xlabel (polar radius) ylabel (angle)************************************** to find the coordinates of the peak point, calculating the initial slope of the frequency and FM (right) find the peak point of the coordinates b = max (max ( wh)) [u, a] = find (wh)

说明：  这是一个完善的KNN算法。算法清晰，备注明确，分类效果良好。(This is a perfect KNN algorithm. Algorithm is clear, clear notes, a good classification results.)

Incremental Conductance: In the incremental conductance algorithm, we find the derivative of PV output power with respect to output voltage. The dP/dV is evaluated and the algorithm keeps checking this value and changes the duty cycle such that dP/dV=- I/V = 0. This is the point at which maximum power is transferred. If dP/dV is greater than zero, it means the PV is operating to the left of the MPP. If dP/dV is less than zero, it means the PV is operating to the right of the MPP. This method holds an advantage over the perturb and observe method since it is fast and does not oscillate around MPP. However, the method could experience instability due the involvement of the derivative.

一个有关支持向量机的matlab工具箱，内含支持向量机理论的简单介绍和matlab工具包(One on support vector machine matlab toolbox, including support vector machines and a brief description of the theory matlab toolkit)

说明：  使用小波变换中的db5进行突变信号奇异值检测的简单程序(Wavelet transform the db5 mutation detection signal singular values simple program)