Lecture 08- Analog Modulation (Frequency Modulation III).pptx - COMSATS SP 2020(Rev 1.0 Principles of Communication Systems(PCS EEE 351 Lecture 08

Lecture 08- Analog Modulation (Frequency Modulation III).pptx

This preview shows page 1 - 4 out of 10 pages.

Principles of Communication Systems (PCS) EEE 351 Lecture # 08 Analog Modulation Frequency Modulation & Comparative Analysis of Analog Modulation Techniques COMSATS SP 2020 (Rev. 1.0)
Image of page 1
FM Sidebands COMSATS PCS Theoretically, during Frequency Modulation , an infinite number of side bands are formed. Only few of these sidebands with significant strength are considered for practical purposes. The sidebands of an FM signal lie symmetrically on both sides of the carrier frequency at equal distances with equal amplitudes. The spacing between these sidebands is equal to the modulating frequency. B.L. Theraja, S.G. Tarnekar, A.K. Theraja, A Text Book of Electrical Engineering, Volume IV. A Frequency Modulated signal consists of the following frequencies f o f o ± f m f o ±2 f m f o ±3 f m B.W= 2n f m OR B.W=2(1 + m f ) f m B.W= 2(Δ f + fm )
Image of page 2
Modulation Index and Number of FM Sidebands COMSATS PCS The number of sidebands depends Directly on the amplitude of the modulating signal.
Image of page 3
Image of page 4

You've reached the end of your free preview.

Want to read all 10 pages?

  • Winter '18
  • Dr Anwar
  • B.L. Theraja, B.W

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes