eas (2.33) 
c? is the contribution of the nth term to the total power, as in Fig. 2.3. 
i POWER 
2 3 
VO T 
Fig. 2.3. Power spectrum of periodic function. 
b. For Nonperiodic Deterministic Functions—Fourier Integral 
For nonperiodic functions with finite energy as in Fig. 2.4, 
X(t) = | X(@) edu , (2.34) 
X() == | X(t) © dw . (2.35) 
Fig. 2.4. Nonperiodic function with finite energy. 
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