function [v_tx]=modulador(v_bits)
v_tx=[];
turno=1;
j=sqrt(-1);
%MAPEADOR QPSK
for i=1:2:length(v_bits)
ent(1:2)=v_bits(i:i+1);
%voy cogiendo los bits de dos en dos
switch turno
case 1 %Portadora fc=0
fc=0;
turno=2;
case 2
fc=pi/16; %Portadora fc=45
turno=3;
case 3
fc=pi/8;
turno=4;
case 4
fc=pi/4;
turno=1;
end
switch ent(1)
case {0}
switch ent(2)
case {0}
v_tx=[v_tx cos(fc+pi/4)+j*sin(fc+pi/4)];
case {1}
v_tx=[v_tx cos(fc+(3*pi/4))+j*sin(fc+(3*pi/4))];
end
case {1}
switch ent(2)
case {0}
v_tx=[v_tx cos(fc+(5*pi/4))+j*sin(fc+(5*pi/4))];
case {1}
v_tx=[v_tx cos(fc+(7*pi/4))+j*sin(fc+(7*pi/4))];
end
end
end
e-REdING. Biblioteca de la Escuela Superior de Ingenieros de Sevilla.
