test_qammod_gray.m

通过图形实现OFMD的图像仿真

M = 16;
x = [0:M-1];
y = qammod(x,M,[],'gray');

% Plot the Gray-coded constellation.
scatterplot(y,1,0,'b.'); % Dots for points.
% Include text annotations that number the points in binary.
hold on; % Make sure the annotations go in the same figure.
annot = dec2bin([0:length(y)-1],log2(M));
text(real(y)+0.15,imag(y),annot);
axis([-4 4 -4 4]);
title('Constellation for Gray-Coded 8-QAM');
hold off;