INTRODUCTION TO COMMUNICATION SYSTEMS

CREDITS - 05

1. Periodic signals (sinusoidal, rectangular, saw tooth and triangular wave) and its Fourier series expansion
with single side representation in real frequency domain and with double side representation in rotating phasor
domain.

2. Aperiodic signal : A signal pulse event and its Fourier transform; impulse response of a linear time invariant
system, convolution and response to arbitrary input.

3. Block diagram of communication system and comparative study of ana log and digital communication.

4. Modulation (upward frequency translation) & demodulation (downward frequency translation) and the need for
modulation: broad classification of modulation [linear (amplitude AM) and exponential (frequency F M and phase PM)]

5. Generation of double side band (DSB) with carrier, double side band with suppressed carrier (DSBSC) and
single side band with suppressed carrier: demodulation of double side band with carrier incoherent detector or
en velope detector, peak diode detector, coherent or synchronous detection of DSBSC and single side band with
suppressed carrier.

6. Analog pulse, modulation PAM, PWM, PPM and demodulation; comparative study of various analog pulse
modulation; comparison of incoherent and coherent detection.

7.Superhetrodyne Receivers : Intermediate Frequency and its advantages, alignment and tracking, image
rejection and IC version of the Receiver. Frequency Multiplexing in carr ier Telephony.

8. Generation of FM signals (direct and indirect methods) and Lecture : 3

9. Comparative study of SNR in AM, FM and PM System and use of emphasis Circuit in FM for SNR
optimization.

10. Television block d iagram of the transmitter and receiver : description and working of video camera ;description working of B W colour TV receiver ;description of the composite signal in B W colour TV.

11. CCD Flat Panel Displays.

Reference Books ;
1. Communication system by Bruce carison . TMH.
2. Electronic Communication system by Kennedy IV Edition. TMH.
3. Electronic Communication system by Roddey & Coolen, Pearson.
4. Telecommunication s ystem Engg. by Freeman John Wiley
5. Communication system by Haykin,Wiley