qam.m

来自「Abstract：Noise frequency modulation(FM)j」· M 代码 · 共 20 行

function QAM ()

% Create a random digital message
M = 16; % Alphabet size
x = randint(5000,1,M); % Message signal

% Use 16-QAM modulation.
y = qammod(x,M);

% Transmit signal through an AWGN channel.
ynoisy = awgn(y,15,'measured');

% Create scatter plot from noisy data.
scatterplot(ynoisy);

% Demodulate to recover the message.
z = qamdemod(ynoisy,M);

% Check symbol error rate.
[num,rt]= symerr(x,z)