- #1

bksree

- 77

- 2

If 2 signals of frequencies y1 = A cos ##\omega_1## t and y2 = A cos ##\omega_2## t are combined the resultant signal is given by y = y1 + y2

y = 2A cos (w1-w2)t/2 cos (w1+w2)t/2

If w1~w2 then one can plot the beat phenomenon from this equation.

But if w1 >> w2 as in the case of a carrier wave and a message wave. Then how can one get the sideband frequencies (w1-w2) and (w1+w2) from this ?

TIA