小编Poo*_*hah的帖子

我正在尝试对16-QAM进行调制和解调,然后尝试比较理论和模拟BER.

我没有simulation在图中获得-line.

我无法理解我的代码有什么问题.有谁能够帮我？

这是代码:

M=16;
SNR_db = [0 2 4 6 8 10 12];
x = randi([0,M-1],1000,1);
hmod = modem.qammod(16);
hdemod = modem.qamdemod(hmod,'SymbolOrder', 'Gray');
tx = zeros(1,1000);
for n=1:1000
tx(n) = modulate(hmod, x(n));
end
rx = zeros(1,1000);
rx_demod = zeros(1,1000);
for j = 1:7
    err = zeros(1,7);
    err_t = zeros(1,7);
    for n = 1:1000
rx(n) = awgn(tx(n), SNR_db(j));
rx_demod(n) = demodulate(hdemod, rx(n));

if(rx_demod(n)~=x(n))
    err(j) = err(j)+1;
end
    end
   % err_t = err_t + err;
end
theoryBer …