www.pudn.com > qpsk-simulink.rar > Ip_01_08.m

% MATLAB script for Illustrartive Problem 8, Chapter 1. 
ts=0.001;                           
fs=1/ts;                            
t=[0:ts:10];                        
x=cos(2*pi*47*t)+cos(2*pi*219*t);   
p=spower(x);                         
psd=spectrum(x,1024);               
pause   % Press a key to see the power in the signal. 
p 
pause   % Press a key to see the power spectrum. 
specplot(psd,fs)