Transmission Bandwidth of FM - Carson's Rule - Bandwidth of NBFM & WBFM

Transmission Bandwidth of FM:

  • Theoretically the bandwidth of the FM Signal is infinite since it contains an infinite number of sidebands.
  • Bandwidth is an infinite for frequency modulation
  • The BW of the frequency modulated wave depends on the modulation index
  • Bandwidth is directly proportional to Modulation Index

Carson's Rule:

  • Carson's rule approximates the bandwidth necessary to transmit the frequency modulated wave as " twice the sum of the peak frequency deviation and the highest modulating frequency 


Youtube video for this lecture is available: https://www.youtube.com/watch?v=4uIqEOGt6Ms

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