%產(chǎn)生QAM信號
function y = QAM4_64(n);
% n=2;
M=2^n; %信號的元數(shù)
switch n
    case  2  
        x = randint(5000,1,M); % Message signal
        y = qammod(x,M);
        scatterplot(y);
    case  3  
        x = randint(5000,1,M); % Message signal
        y = qammod(x,M);
        scatterplot(y); 
   case  4 
        x = randint(5000,1,M); % Message signal
        y = qammod(x,M);
        scatterplot(y);
    case  5  
        x = randint(5000,1,M); % Message signal
        y = qammod(x,M);
        scatterplot(y); 
    case  6 
        x = randint(5000,1,M); % Message signal
        y = qammod(x,M);
        scatterplot(y);  
%     otherwise  
%         disp('M不在我們研究的范圍');
end;
           
            
% x = randint(5000,1,M); % Message signal
% y4QAM = qammod(x,M);
% scatterplot(y4QAM);