QAM调制信号产生和星座图产生_QAM调制_matlab

close all clear all clc M = 16; N = 10000; SNR = 10; for i=1:30; msg = randi([0 M-1],1,N); sig = qammod(msg,M); scatterplot(sig); if i<10 saveas(gcf,['.\qam\sig',num2str(i)','.jpg']); else saveas(gcf,['.\qam\sig',num2str(floor(i/10)),num2str(i-floor(i/10)*10),'.jpg']); end sig_n = awgn(sig,SNR); scatterplot(sig_n); if i<10 saveas(gcf,['.\qam\sig_n',num2str(i)','.jpg']); else saveas(gcf,['.\qam\sig_n',num2str(floor(i/10)),num2str(i-floor(i/10)*10),'.jpg']); end end