8.5 MATLAB Files

8.5.1 1394-1995 PSD

 f=[0:1000]/1000*4e8; k=0.2^2/110/0.001; T1=1/98.304e6; T2=T1/2; T3=T2/2; PSDs1=10*log10(k/T1*((sin(pi*f*T1)).^2./(pi*f).^2)); PSDs2=10*log10(k/T2*((sin(pi*f*T2)).^2./(pi*f).^2)); PSDs3=10*log10(k/T3*((sin(pi*f*T3)).^2./(pi*f).^2)); for i=1:1000     if PSDs1(i)<-140         PSDs1(i)=-140;     end     if PSDs2(i)<-140         PSDs2(i)=-140;     end     if PSDs3(i)<-140         PSDs3(i)=-140;     end end plot(f,PSDs1,f,PSDs2,f,PSDs3); grid xlabel('Frequency (Hz)') ylabel('PSD (dBm/Hz)') gtext('S100') gtext('S200') gtext('S400')