Secure Transmit Antenna Selection Protocol for MIMO NOMA Networks Over Nakagami-m Channels

Abstract

In this paper, we consider a multi-input multioutput (MIMO) non-orthogonal multiple access (NOMA) network consisting of one source and two legitimate users (LUs), so-called near and far users according to their distances to the source, and one passive eavesdropper, over Nakagami-m fading channels. Specifically, we investigate the cases where the signals of the far user might or might not be successfully decoded at the eavesdropper and the near user. Thus, we aim to design a transmit antenna selection (TAS) secure communication protocol for the network; where, two TAS solutions, namely Solutions I and II, are proposed. Specifically, solutions I and II focus on maximizing the received signal power between the source and the near user, and between the source and the far user, respectively. Accordingly, exact and asymptotic closed-form expressions for the secrecy outage probability of the LUs and the overall system are derived. Our analytical results corroborated by Monte Carlo simulation indicate that the secrecy performance could be significantly improved by properly selecting the power allocation coefficients and increasing the number of antennas at the source and the LUs. Interestingly, solution II is shown to provide a better overall secrecy performance over solution I.Index Terms-Transmit antenna selection, MIMO, nonorthorgonal multiple access, physical layer security.

On secure system performance over SISO, MISO and MIMO-NOMA wireless networks equipped a multiple antenna based on TAS protocol

“…Due to Kong et al [40] confirmed that the factors include number of users, path-loss exponent, the number of antennae impacted on system performance. We therefore set the parameters for two users U 1 and U 2 and an eavesdropper E, path-loss exponent r = 4 [41]. We subjected the parameters to analysis and simulate as shown in Table 1.…”

“…Some important and recent studies similar to this research are [36][37][38][39][40][41][42][43]. In the excellent work [36], the authors investigated SOP for the cooperative NOMA (C-NOMA) in CR networks and took into account the impact of distance of users from the BS on secrecy performance.…”

“…From the obtained results, the author indicated that SOP performance was impacted by the number of users, the path-loss exponent and the number of antennae. In the work [41], the authors investigated a MIMO-NOMA system based on TAS protocol for two users over Nakagami-m fading channels. Although the work was interesting, the authors, however, did not consider the PA issue, such as in [36].…”

Outage and ergodic sum‐rate performance of cooperative MIMO‐NOMA with imperfect CSI and SIC

“…The outage probability (OP) performance of the joint AS algorithms proposed in Yu et al is studied for the cases of fixed power coefficients and optimized ones in Li et al and Yu et al, respectively. The secrecy OP performance of the NOMA networks has been investigated for different TAS schemes in previous works . The OP and ergodic sum‐rate performances have been analyzed in Aldababsa et al for the NOMA network with maximal ratio combining (MRC).…”

Performance Analysis for NOMA Relaying System in Next-Generation Networks with RF Energy Harvesting

“…In recent years, a number of works investigated some related issues such as performance of energy harvesting DF/AF relaying, cooperative, cognitive, and MIMO NOMA networks [12][13][14][15]. In addition, the work of [16] studied the secrecy performance of MIMO NOMA system over Nakagami-m channels with transmit antenna selection protocol. However, almost in these works the information sources are assumed that it can transmit RF energy and information by using TS or PS scheme.…”