FSK Constellations

% Plot a theoretical binary FSK constellation
t = linspace(0,2*pi,100);

% change these f's to look at orthoganality
f1 = 100;
f2 = 200;
basis = [cos(2*pi*t*f1); cos(2*pi*t*f2)] ;

symbols = basis;

constellation = zeros(1,2);
constellation(1) = sum(symbols(1,:).*basis(1,:));
constellation(1) = constellation(1) + j*sum(symbols(1,:).*basis(2,:));
constellation(2) = sum(symbols(2,:).*basis(1,:));
constellation(2) = constellation(2) + j*sum(symbols(2,:).*basis(2,:));

vector_angles = angle(constellation)*180/(pi)
fprintf('The first symbol has vector angle %2.1f\n',vector_angles(1));
fprintf('The second symbol has vector angle %2.1f\n',vector_angles(2));

figure();
plot(constellation, 'o');