- #1
Dina Khaled
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Homework Statement
Trying to calculate Conventional AM average transmitted power of the modulated signal
s(t) = A (1+ka m(t) ) cos(2∏f t)
where
A: carrier amplitude
ka: amplitude sensitivity
m(t) : message signal
f: Carrier frequency
my professor's lecture notes calculate the average power as
0.5 A2( 1+< ka2 m2(t)>)
where <.> is the time average.
Homework Equations
Average Power (for periodic Signals) = 1/T (∫0T x2(t) dt)
The Attempt at a Solution
average power for cos(2∏ft) =0.5
but applying the Average power rule I can't get this integral to be equal to the formula my professor's got!
Thanks in advance.
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