pdf.m

无线移动信道的matlab源码 用于对无线通信信道的编程实现

%--------------------------------------------------------------------
% pdf_sim.m ---------------------------------------------------------
%
% Program for the computation of probability density functions p(z).
%
%--------------------------------------------------------------------
% p_z=pdf_sim(xi_t,z,PLOT)
%--------------------------------------------------------------------
% Explanation of the input parameters:
%
% xi_t: deterministic process or time-domain signal to be analysed 
%       with respect to the probability density function p(z).
% z: equidistant level vector
% PLOT: plot of the resulting probability density function p(z), 
%       if PLOT==1

function [p_z,r]=pdf(sigma_1_2,sigma_2_2,z,rou,f_max,PLOT)

f_c=sqrt(log(2))*f_max;
if nargin==2,
   PLOT=0;
end
sigma_2=sigma_1_2+sigma_2_2;
z=interp(z,15);
a=(z.*z+rou^2)/(2*sigma_2);
b=z/sigma_2;
c=z*rou/sigma_2;
p_z=b.*exp(-a).*besselj(0,c);
r=z;
% N_realr=N_realr/max(N_realr);
if PLOT==1,
  
   plot(z,p_z)
   xlabel('r')
%    ylabel('p(z)')
end