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//Chapter-11 example 21
//=============================================================================
clc;
clear;
//input data
Noise_power = -50;//noise power in dBm
Fl = 1*10^6;//lower cutoff frequency in Hz
Fh = 21*10^6;//upper cutoff frequency in Hz
//calculation
BW = Fh-Fl;//bandwidth
NP =10^-8//noise power in watts; -50dBm = 10log10(NP) =>10^-5 mwatts
NPSD = NP/BW;//noise power spectral density in W/Hz
//output
mprintf('Noise Power Spectral Density is %3.0e W/Hz',NPSD);
//==============end of the program=============================================
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