... %truong hop 4 bit 0 lien tiep if mod(b,2)==1 temp(i) = 0; %bit 0 temp(i+1) = 0; %bit 0 temp(i+2) = 0; %bit 0 temp(i+3) = -next_polar;%bit V next_polar = -next_polar; b=0; i=i +4; else ... - 9 - - 7 - xlabel('frequency/F_s voi F_s = 4/ T_b= 4* f_C_L_K' ) else FFT_Y1 = abs(fft(Y1, N))/N; FFT_Y1 = fftshift(FFT_Y1); F = [-N/2:N/2-1]./N*2; ... case {4} subplot(3,1,3) [y,t]=dmod(data1,Fc,Fd,Fs,'qask',M); plot(t,y); otherwise error('nhap sai gia tri yeu cau'); - 3 - end y=temp; 4. Mó AMI:...