pdf_sim.m

一些非常有用的MATLAB源码,对于提高编程水平和学习通信理论知识还有帮助.

%--------------------------------------------------------------------
% 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=pdf_sim(xi_t,z,PLOT)

if nargin==2,
   PLOT=0;
end

p_z=hist(xi_t,z)/length(xi_t)/abs(z(2)-z(1));

if PLOT==1,
   plot(z,p_z,'mx')
   xlabel('z')
   ylabel('p(z)')
end