1219402133

Guassian Hidden markov model

说明：  neural network falut finding

matlab code for fisher

高斯噪声产生的代码,含有射频噪声干扰的代码(Gaussian noise code, containing RF noise code)

拉格朗日插值法和牛顿插值法，matlab软件编程，.m文件(Lagrange interpolation and Newton interpolation, MATLAB software programming,.M file)

说明：  差分进化算法,是一种新兴起的智能计算方法.它能求解各种无约束优化问题.(Differential evolution algorithm, is a new emerging intelligent methods of calculation. It can to solve a variety of unconstrained optimization problems.)

Modelo de dos rayos de Andrea Goldsmith (figura 2.5, según expresión 2.12) f = 0.9 frecuencia en GHz landa = 0.3/f en m R = -1 coeficiente de reflexión en tierra ht = 10 altura del transmisor en m hr = 2 altura del receptor en m Gt = 1 Gr = 1 Pt = 1 d=10:.1:100000 phase_diff = 4*pi*ht*hr./(landa*d) aproximación Pr = Pt*((landa/(4*pi))^2)*((abs((sqrt(Gt)./d) + (R*sqrt(Gr).*(exp(-sqrt(-1)*phase_diff)))./d)).^2) Pr = Pt*((landa/(4*pi))^2)*(1./d).*((abs((sqrt(Gt)) + (R*sqrt(Gr).*(exp(-sqrt(-1)*phase_diff))))).^2) figure(1), clf, plot((d),10*log10(Pr/max(abs(Pr)))) grid xlabel( log_1_0(d) ) ylabel( Potencia recibida (dBm) )

说明：  为了降低卫星链路在恶劣天气下对信号严重的衰减，选择一种好的信道编码对保证信号的质量具有重要的意义(THE SATELLITE COMUNICATION SYSTEM LINK DESIGN BASED ON VSAT)

用matlab在极坐标下画天线方向图，可以运行，已经测试过(In the polar coordinates with matlab draw Antenna)

74H166资料参考，帮助你更好的写好程序应用等(74H166 reference material to help you better application of written procedures)