Executive Summary : | This project aims to address three fundamental problems for large-scale wireless networks: network lifetime, spectrum scarcity, and security. Enabling spectrum sharing in licensed spectrum can significantly impact social, economic, and policy-making aspects of future wireless networks. Physical layer security can play a crucial role in preventing security breaches and stopping attackers from decoding messages. The excessive consumption of energy for ICT has triggered the alarm to look into designing wireless infrastructure to support green communications. Physical layer security is crucial in preventing security breaches and preventing malicious attacks. SWIPT uses inherent characteristics of the wireless channel, such as multipath propagation, noise, and interference, to perform key-less secure communications through various coding and signal processing techniques. It operates independently from existing key-based security algorithms and can be integrated into the prevailing security infrastructure of various types of wireless networks. Recent works have demonstrated the benefits of utilizing multi-relay diversity, multi-user diversity, and the combined benefits of multi-user and multi-relay diversity for enhancing security under passive eavesdropping scenarios. |