Frequency Modulation

Discussion in 'Wireless & RF Design' started by suzuki, Apr 17, 2012.

  1. suzuki

    Thread Starter Member

    Aug 10, 2011
    119
    0
    Hi,

    I have a question about FM and Bessel functions. Usually we use bessel functions of the first kind to show the magnitudes of the side bands.

    My question is the implications of having a negative amplitude for the carrier frequency. The magnitude of my carrier is still relevant (around 0.3) but since its negative, do i still need to consider it against my other sidebands that have amplitudes that are positive?

    I guess in short, my question is, when considering the sidebands, are we looking at the amplitude or the magnitude? i.e. is -0.3 more significant than 0.05?

    tia
     
  2. panic mode

    Senior Member

    Oct 10, 2011
    1,321
    304
    you should think in terms of magnitude
     
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