How can established LOS-link for Indoor visible light communications using only one LED source?

Visible light communications

Answer 1

[abdullah qasim]

clear

clc

theta=70;

% semi-angle at half power

m=-log10(2)/log10(cosd(theta));

%Lambertian order of emission

P_total=2000;

%transmitted optical power by individual LED

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))]);

Answer 2

[shimels gbre ab abebe]

Hello every one can I olease source code for hand over mangment betwen VLC and RF

please ?

Answer 3

[Nandini Priya]

I NEED TRANSMISSION OF VIDEO USING LIFI TECHNOLOGY CAN ANYONE HELP ME?