#### Phasor

It is common terminology to call the complex sinusoid's*phasor*, and its

*carrier wave*. For a

*real*sinusoid,

re

The *phasor magnitude*is the

*amplitude*of the sinusoid. The

*phasor angle*is the

*phase*of the sinusoid. When working with complex sinusoids, as in Eq.(4.11), the phasor representation of a sinusoid can be thought of as simply the

*complex amplitude*of the sinusoid.

*I.e.*, it is the complex constant that multiplies the carrier term .

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Why Phasors are Important

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FM Spectra