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An amplitude modulated signal consists of a CW (continuous wave) at the carrier frequency, plus two
components for each frequency in the modulating information. The two components are separated
from the carrier by a frequency equal to the modulating frequency, with one above and one below the
carrier frequency. Thus, the modulating information appears twice in the spectrum of the modulated signal.
Wiki User
∙ 14y ago
Cloudy cotton
Wiki User
∙ 14y agoV = cos(2 pi freq-1 t) times cos(2 pi freq-2 t).
The frequency spectrum of 'V' consists of a central component at freq-2, and two other components,
one on either side of freq-2, spaced by (freq-1) above and below it. These 'sidebands' appear at
(freq-2 - freq-1) and (freq-2 + freq-1). I don't remember what the amplitude of the sidebands is,
compared to the amplitude of the 'carrier' (freq-2).
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