Study of Amplitude Modulation and Demodulation using Simulink: An Experiment Report, Lab Reports of Data Communication Systems and Computer Networks

Download Study of Amplitude Modulation and Demodulation using Simulink: An Experiment Report and more Lab Reports Data Communication Systems and Computer Networks in PDF only on Docsity! 6 Zaman, Akif 17-33224-1 BSc[CSE] American International University- Bangladesh (AIUB) Faculty of Engineering Course Name: Data Communication Semester: Summer (2021-2022) Section: H Course Code: COE 3101 Faculty: Abrar Fahim Liaf Experiment No: 07 Experiment Name: Study of Amplitude Modulator and Demodulator using Simulink Submission Date: August 10, 2022 Group No: 02 No Name ID Program 1 Jahid, Md. Jakaria Sultan 20-43486-1 BSc[CSE] 2 Chakraborty, Sumit 20-43472-1 BSc[CSE] 3 Galib, Shaikh Allahma 20-42325-1 BSc[CSE] 4 Alam, Md. Fahim 20-42517-1 BSc[CSE] 5 Mehjabin, Maliha 20-42508-1 BSc[CSE] 6 Akif Zaman 17-33224-1 BSc[CSE] Submitted by: Akif Zaman ID : 17-33224-1 Title: Study of Amplitude Modulator and Demodulator using Simulink Abstract: This experiment demonstrates how to understand the use of Simulink for AM modulation. This experiment's primary objective is to develop understanding of AM demodulation. Theory: One common technique for transmitting message signals using a carrier wave is amplitude modulation (AM). The amplitude or strength of the high frequency carrier wave is modified in accordance with amplitude of the message signal.  Carrier signal (Sc) = Acsin(2πfct)  Message signal (Sm) = Amsin(2πfmt) # fm must be smaller than fc When carrier amplitude is altered with respect to message signal, • Modulated Signal = (Ac+ Amsin(2 πfmt))*sin(2 πfct) In terms of modulation index (m=Am/Ac) the equation becomes • Modulated signal= (1+ msin(2 πfmt))*Acsin(2 πfct) Were, • Ac= Carrier signal amplitude • Am = Message signal amplitude • fc= Carrier frequency • fm =Message frequency Generating AM in Simulink For generating AM implement the equation of AM in block level is required. Blocks Required Analyzing the equation, we need, 1. Carrier Signal Source 2. Message Signal Source 3. Blocks for viewing the signals – Scope 4. Product Block 5. Summer Block 6. Constant Block We can find these blocks in the following locations of Simulink Library… Carrier, Message, Constant blocks • Simulink –> Sources –> Sine wave • Simulink –> Sources –> Constant