AM wave may be represented as

Q.  AM wave may be represented as E(t) cos ωct where E(t) is
- Published on 13 Oct 15

a. Envelope of the AM wave
b. Carrier signal
c. Amplitude of modulating signal
d. None of the above

ANSWER: Envelope of the AM wave
 
An AM wave may be represented by
s(t) = [A+ x(t)] cos ωct
= E(t) cos ωct

Where x(t) is the modulating signal

A is the amplitude of carrier wave
E(t) is the Envelope of the AM wave

The envelope consists of the modulating signal that may be recovered from AM signal using demodulation techniques.

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