TY - GEN
T1 - QoS Aware Transmit Beamforming for Secure Backscattering in Symbiotic Radio Systems
AU - Nie, Mingcheng
AU - Mishra, Deepak
AU - Al-Nahari, Azzam
AU - Yuan, Jinhong
AU - Jäntti, Riku
N1 - Publisher Copyright: © 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - This paper focuses on secure backscatter transmission in the presence of a passive multi-antenna eavesdropper through a symbiotic radio (SR) network. Specifically, a single-antenna backscatter device (BD) aims to transmit confidential information to a primary receiver (PR) by using a multi-antenna primary transmitter's (PT) signal, where the received symbols are jointly decoded at the PR. Our objective is to achieve confidential communications for BD while ensuring that the primary system's quality of service (QoS) requirements are met. We propose an alternating optimisation algorithm that maximises the achievable secrecy rate of BD by jointly optimising primary transmit beamforming and power sharing between information and artificial noise (AN) signals. Numerical results verify our analytical claims on the optimality of the proposed solution and the proposed methodology's underlying low complexity. Additionally, our simulations provide nontrivial design insights into the critical system parameters and quantify the achievable gains over the relevant benchmark schemes.
AB - This paper focuses on secure backscatter transmission in the presence of a passive multi-antenna eavesdropper through a symbiotic radio (SR) network. Specifically, a single-antenna backscatter device (BD) aims to transmit confidential information to a primary receiver (PR) by using a multi-antenna primary transmitter's (PT) signal, where the received symbols are jointly decoded at the PR. Our objective is to achieve confidential communications for BD while ensuring that the primary system's quality of service (QoS) requirements are met. We propose an alternating optimisation algorithm that maximises the achievable secrecy rate of BD by jointly optimising primary transmit beamforming and power sharing between information and artificial noise (AN) signals. Numerical results verify our analytical claims on the optimality of the proposed solution and the proposed methodology's underlying low complexity. Additionally, our simulations provide nontrivial design insights into the critical system parameters and quantify the achievable gains over the relevant benchmark schemes.
UR - http://www.scopus.com/inward/record.url?scp=85187321852&partnerID=8YFLogxK
U2 - 10.1109/GLOBECOM54140.2023.10437724
DO - 10.1109/GLOBECOM54140.2023.10437724
M3 - Conference article in proceedings
AN - SCOPUS:85187321852
T3 - Proceedings - IEEE Global Communications Conference, GLOBECOM
SP - 7
EP - 12
BT - GLOBECOM 2023 - 2023 IEEE Global Communications Conference
PB - IEEE
T2 - IEEE Global Communications Conference
Y2 - 4 December 2023 through 8 December 2023
ER -