lcr_nakagami.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

%--------------------------------------------------------------------
% lcr_sim.m ---------------------------------------------------------
%
% Program for the computation of the level-crossing rate N(r).
%
%--------------------------------------------------------------------
% N_r=lcr_sim(xi_t,r,T_sim,PLOT)
%--------------------------------------------------------------------
% Explanation of the input parameters:
%
% xi_t: deterministic process or time-domain signal to be analysed 
%       with respect to the level-crossing rate N(r)
% r: level vector
% T_sim: duration of the simulation
% PLOT: plot of the resulting level-crossing rate N(r), if PLOT==1

function N_r=lcr_Nakagami(sigma_1_2,sigma_2_2,r,thita,BEITA1,BEITA2,PLOT)
global BEITA1 BEITA2

if nargin==3,
   PLOT=0;
end
N_r=zeros(1,length(r));
for i=1:length(r)
a1=sigma_2_2*(cos(thita).*cos(thita));
a2=sigma_1_2*(sin(thita).*sin(thita));
c=a1+a2;
b=sqrt(sigma_1_2*sigma_2_2);
d=(2*pi)^(3/2);
b1=r(i)/(d*b);
b2=-(r(i).*r(i))/(2*sigma_1_2*sigma_2_2);
b3=exp(b2.*c);
a3=BEITA1*(cos(thita).*cos(thita));
a4=BEITA2*(sin(thita).*sin(thita));
c2=sqrt(a3+a4);
d1=b3.*c2;
% d1=curv(b3,thita,BEI1,BEITA2);
e=quad('curv',0,2*pi);
N_r(i)=b1.*e;
end


if PLOT==1,
   plot(r,N_r)
   xlabel('r')
   ylabel('N(r)')
end