how does AWGN and 16qam mod demod m file code look like ?

here i attach my progress work to create m file.but a few i dont know how to complete this. i want to perform a constellation diagram for 16qam modulation http://www.mediafire.com/?36t505ivp5tdcsl

tq for any one who can help me..

Answer 1

[jessica david]

M = 16; % Size of alphabet x = randint(1000,1,M); % Random signal

y = qammod(x,M);

X=awgn(y,10);%add Gaussian noise

%scatterplot(X);%plot constellation diagram