IT 2202 PRINCIPLES OF COMMUNICATION Lecture Notes for IT - Third (3rd) semester
IT2202 Lecture Notes
UNIT I FUNDAMENTALS OF ANALOG COMMUNICATION
Principles of amplitude modulation, AM envelope, frequency spectrum and bandwidth,
modulation index and percent modulation, AM Voltage distribution, AM power
distribution, Angle modulation - FM and PM waveforms, phase deviation and modulation
index, frequency deviation and percent modulation, Frequency analysis of angle
modulated waves. Bandwidth requirements for Angle modulated waves.
UNIT II DIGITAL COMMUNICATION
Introduction, Shannon limit for information capacity, digital amplitude modulation,
frequency shift keying, FSK bit rate and baud, FSK transmitter, BW consideration of
FSK, FSK receiver, phase shift keying – binary phase shift keying – QPSK, Quadrature
Amplitude modulation, bandwidth efficiency, carrier recovery – squaring loop, Costas
UNIT III DIGITAL TRANSMISSION
Introduction, Pulse modulation, PCM – PCM sampling, sampling rate, signal to
quantization noise rate, companding – analog and digital – percentage error, delta
modulation, adaptive delta modulation, differential pulse code modulation, pulse
transmission – Intersymbol interference, eye patterns.
UNIT IV SPREAD SPECTRUM AND MULTIPLE ACCESS TECHNIQUES
Introduction, Pseudo-noise sequence, DS spread spectrum with coherent binary PSK,
processing gain, FH spread spectrum, multiple access techniques – wireless
communication, TDMA and CDMA in wireless communication systems, source coding of
speech for wireless communications.
UNITV SATELLITE AND OPTICALCOMMUNICATION
Satellite Communication Systems-Keplers Law,LEO and GEO Orbits, footprint, Link
model-Optical Communication Systems-Elements of Optical Fiber Transmission link,
Types, Losses, Sources and Detectors.