Open AccessGeneralised switching protocol of energy harvesting for enhancing the security of AF multi‐antenna relaying systems
Author(s) -
Zhang Ying,
Jiang XueQin,
Hou Jia,
Bai EnJian,
Peng Yuyang,
Wang HuiMing
Publication year - 2020
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2019.0516
Subject(s) - relay , node (physics) , computer science , computer network , ergodic theory , secrecy , energy harvesting , energy (signal processing) , flexibility (engineering) , power (physics) , protocol (science) , antenna (radio) , topology (electrical circuits) , telecommunications , electrical engineering , mathematics , computer security , engineering , physics , mathematical analysis , statistics , quantum mechanics , medicine , alternative medicine , structural engineering , pathology
In this study, the authors propose a generalisedswitching protocol (GSP) for increasing the flexibility of energy harvesting (EH) protocol and enhancing the security of amplify‐and‐forward (AF) multi‐antenna relaying system. The proposed GSP‐based relaying [generalised switching relaying (GSR)] system is established with target node assisted interference and EH technologies. In phase I, while the source transmits certain signal to the relay, the destination transmits an artificial noise to interfere the passive eavesdropper. In this phase, the relay harvests energy from the two nodes. In phase II, the relay node processes the two different received signals, which are from the source and destination, then AF them by utilising the harvested energy. The authors also derive a new analytical formula for the proposed protocol on ergodic secrecy capacity. The effect of the number of relay antennas N , the source transmitted power P s , the destination transmitted power P d and EH efficiency factors η t and η p on ergodic secrecy capacity are investigated. The simulation results show that as N , P s , P d , η t and η p increase, the ergodic secrecy capacity of GSR system increases accordingly. Moreover, the GSR protocol can provide higher ergodic secrecy capacity than both time switching relaying and powersplitting relaying protocols.