Performance Analysis and Beamforming Design of a Secure Cooperative MISO-NOMA Network

Abstract

This paper studies the cell-edge user’s performance of a secure multiple-input single-output non-orthogonal multiple-access (MISO-NOMA) system under the Rayleigh fading channel in the presence of an eavesdropper. We suppose a worst-case scenario that an eavesdropper has ideal user detection ability. In particular, we suggest an optimization-based beamforming scheme with MISO-NOMA to improve the security and outage probability of a cell-edge user while maintaining the quality of service of the near-user and degrading the performance of the eavesdropper. To this end, power allocation coefficients are adjusted with the help of target data rates of both the users by utilizing a simultaneous wireless information and power transfer with time switching/power splitting protocol, where the near-user is used to forward the information to cell-edge user. The analytical results demonstrate that our beamformer analysis can achieve reduced outage probability of cell-edge user in the presence of the eavesdropper. Moreover, the provided simulation results validate our theoretical analysis and show that our approach improves the overall performance of a two-user cooperative MISO-NOMA system.

Physical Layer Security Performance of NOMA-Aided Vehicular Communications Over Nakagami-$m$ Time-Selective Fading Channels With Channel Estimation Errors

“…2) Asymptotic SOP limit when γ → ∞: We can express the SOP asymptotic limit (when γ → ∞) for the far user vehicle V f under Scenario I by invoking (31). Moreover, the SOP asymptotic limit for near user vehicle V n under Scenario I can be obtained by setting (33).…”

“…Moreover, the authors in [27]- [30] have exploited the benefits of antenna selection at the base station to improve the secrecy performance of multiple-input-single-output (MISO) NOMA-enabled communication systems. Furthermore, the authors in [31] have proposed a secure beamforming strategy for MISO NOMA systems. Recently, the authors in [32] have designed a joint beamforming and power allocation scheme under Rayleigh fading channels to enhance the security of MISO NOMA system under multiple eavesdroppers.…”

“…Also, since E's capabilities are often unknown, therefore, it is reasonable to overestimate E's multi-user decodability. In the literature, many works have focused on PLS performance of NOMA systems under such assumption (see[17],[27],[31] and the references therein), which motivates us to adopt this scenario for investigating the PLS performance in our considered NOMA-aided V2V communications.6 VOLUME , This article has been accepted for publication in IEEE Open Journal of Vehicular Technology. This is the author's version which has not been fully edited and content may change prior to final publication.…”

Radio Frequency Fingerprinting for Frequency Hopping Emitter Identification

“…Recently, a frequency hopping network based on non-orthogonal multiple access (NOMA) was proposed [14]. In the NOMA system, the probability that the attacker intercepts the FH signal can be reduced through the two-stage relay communication [15], the additive artificial noise method [16], and the optimization of the power allocation for the beamforming scheme [17]. However, this anti-interception capability is closely related to the outage probability of the NOMA users, closely related to the signal power.…”

Physical-Layer Security in Power-Domain NOMA Based on Different Chaotic Maps

“…The mask sequence, w, and d 3 are utilized to create d 4 . To obtain d 4 i ˛, the corresponding d 3 i ˛is complemented. If w i ˛= 1, or else it is not varied.…”