subplot(2,2,1);

[m n] = size(G);

% x = G(1,2) + (G(m,2) - G(1,2))/2;
% y = max(max(G(:,3:5)));
% y = 0.75*y;

a = axis;

x = a(1) + (a(2)-a(1))/20;
y = 0.5e-2; % a(3) + (a(4)-a(3))/20;

text(x,y, ['.......  deterministic'; ...
           '-.-.-. Gaussian       '; ...
           '---- direct ML        '; ...
           '\_\_\_\_ known channel']);
