1. Introduction to Communication Systems (CNET - 222)
Dr. Mohammed Abdul Gaffar Ali
Department of Computer Networks
College of CS&IS
Jazan University, Jazan.

2. Chapter 2 Amplitude Modulation
Introduction To Amplitude Modulation (AM)
Equation for Message Carrier & Modulated Wave
Types of Amplitude Modulation
Advantages of AM
Disadvantages AM.

3. Introduction To Amplitude Modulation (AM).
Definition:-
The amplitude of the carrier is made
proportional to the instantaneous amplitude of the modulating voltage

4. Wave Forms For Message ,Carrier & AM Signals.

7. Equations.
Modulating Signal:-
Carrier Signal :-
AM Signal :-

8. Modulation Index.
Definition:-The ratio between the amplitudes of message signal and carrier signal is called Modulation Index.

10. M < 1 Under Modulation M = 1 Perfect Modulation.
Modulation Index
M > 1 Over Modulation
M < 1 Under Modulation
M = Perfect Modulation.

11. Types of AM.

12. DSBFC :- Double Side Band Full Carrier. Power = PAM
Band Width (BW)= 2Fm

13. DSBSC :- Double Side Band Suppressed Carrier. Power = PAM 3
Band Width (BW)= 2Fm

14. SSB :- Single Side Band Power = PAM 6 Band Width (BW)= Fm

15. VSB:- Vestigial Side Band. It is between SSB & DSBSC.

16. It is easy to receive and demodulate.
Advantages of AM.
It is easy to generate.
It is easy to receive and demodulate.
It is used worldwide.

17. It is more likely to be affected by Noise The power of AM is low.
Disadvantages of AM.
It is more likely to be affected by Noise
The power of AM is low.

18. Thank You