ABOUT THE COURSE:Optical Wireless Communications (OWC) has become a promising technology for supporting high-data-rate 5G communication and the massive connectivity of IoT. This course broadly covers the four important aspects of OWC systems: (a) the fundamental principles of OWC, (b) devices and systems, (c) modulation techniques and (d) channel models and system performance analysis.The course also covers different challenges encountered in OWCs as well as outlining possible solutions and current research trends. The course will also involve MATLAB® simulations to help students understand the topic under discussion and to be able to carry out extensive simulations.PREREQUISITES: Signals and SystemsINDUSTRY SUPPORT: Sterlite Technologies Ltd., Tejas Networks, BSNL - other Telecom companies, BEL, ITI etc
Overview
Syllabus
Week 1: Introduction: Optical Wireless Communication Systems
Existing wireless Access Schemes, OWC/Radio Comparison, Potential OWC Application Areas
Week 2: Optical Sources
LEDs and Lasers (Internal and External Quantum Efficiency, Power and Luminous Efficiency, and Modulation Bandwidth)
Week 3: Detectors
PIN and APD Photodetector, Photodetection Techniques, Photodetection Noise
Week 4: Indoor Optical Wireless Communication Channel Modelling
LOS Propagation Model, Non-LOS Propagation Model, Interference from other other Light sources
Week 5: Outdoor Optical Wireless Communication Channel Modelling
Atmospheric Channel Loss, Beam Divergence, Pointing Loss, Different Atmospheric Turbulence Models
Week 6: Underwater Optical Wireless Communication Channel Modelling
Absorption, scattering, Turbulence, Multipath interference, Physical obstruction, and
Background noise.
Week 7, 8: Modulation Schemes
Digital Baseband Modulation Techniques like PAM, PPM, PIM etc., Multi-carrier Modulation (OFDM) for OWC, Color Shift Keying, NOMA etc.
Week 9: System Performance Analysis: Indoor OWC links
Effect of Ambient Light Sources on Indoor OWC Link Performance, Link Performance for Multipath Propagation
Week 10: System Performance Analysis: Outdoor OWC links
FSO Link Performance under the Effect of Atmospheric turbulence, Atmospheric Turbulence-Induced Penalty and mitigation strategies
Week 11, 12: Use cases and Simulation Exercises
• Indoor OWC link
• O-OFDM and CSK Modulation Schemes
• WiFi/LiFi Co-existence
• V2V Communications
Taught by
Prof. Anand Srivastava
