MATLAB Answers

cognitive based visible light communication

조회 수: 14(최근 30일)
sathia charu
sathia charu 2019년 2월 5일
답변: abdullah qasim 2019년 12월 9일
please send some codes related to cognitive based visible light communication.

답변(1개)

abdullah qasim
abdullah qasim 2019년 12월 9일
this code for one LED
clear
clc
theta=70;
% semi-angle at half power
m=-log10(2)/log10(cosd(theta));
%Lambertian order of emission
P_total=20;
%transmitted optical power by individual LED if more than one led Ptotal =nledf*nledf*p
Adet=1e-4;
%detector physical area of a PD
Ts=1;
%gain of an optical filter; ignore if no filter is used
index=1.5;
%refractive index of a lens at a PD; ignore if no lens is used
FOV=60*pi/180;
%FOV of a receiver
G_Con=(index^2)/sin(FOV);
%gain of an optical concentrator; ignore if no lens is used
lx=5; ly=5; lz=3;
% room dimension in metre
h=2.15;
%the distance between source and receiver plane
%[XT,YT]=meshgrid([?1.25 1.25],[?1.25 1.25]);
XT=0; YT=0;
% position of LED;
Nx=lx*10; Ny=ly*10;
% number of grid in the receiver plane
x=-lx/2:lx/Nx:lx/2;
y=-ly/2:ly/Ny:ly/2;
[XR,YR]=meshgrid(x,y);
% receiver plane grid
D1=sqrt((XR-XT(1,1)).^2+(YR-YT(1,1)).^2+h^2);
% distance vector from source 1
cosphi_A1=h./D1;
% angle vector
H_A1=(m+1)*Adet.*cosphi_A1.^(m+1)./(2*pi.*D1.^2);
% channel DC gain for source 1
P_rec=P_total.*H_A1.*Ts.*G_Con;
% received power from source 1;
P_rec_dBm=10*log10(P_rec);
surfc(x,y,P_rec_dBm);
% contour(x,y,P_rec_dBm);hold on
%mesh(x,y,P_rec_dBm);
%meshc(x,y,P_rec_dBm);
xlabel('X (m)');
ylabel('Y (m)');
zlabel('Received power (dBm)');
axis([-lx/2 lx/2 -ly/2 ly/2 min(min(P_rec_dBm)) max(max(P_rec_dBm))]);

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