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Signal Image and Video Processing

Secrecy rate analysis and power allocation strategies for control jamming-enabled STAR-RIS NOMA wireless network with non ideal hardware

Uma Maheswara Rao Ukyam, Kiran Kumar Gurrala

Published Jun 17, 2024• 3 citations
Publisher
DOI
10.1007/s11760-024-03335-6

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Summary In this work, a new control jamming (CJ) scheme has been proposed for a cooperative nonorthogonal multiple access (NOMA) network with optimal power allocation factors by employing decode‐and‐forward (DF) relay. Maximization of secrecy rate at both NOMA users with the aid of CJ under total transmit power constraint is considered as an optimization problem. In this regard, invasive weed optimization (IWO) algorithm‐based approach is proposed to facilitate optimal power allocation for the considered network. In this analysis, performance metric secrecy rate is analyzed with CJ at both NOMA users by varying the location of eavesdropper with respect to the relay and jammer. In addition, the performance of fixed power allocation (FPA) and proposed power allocation (PPA) schemes is investigated with CJ and compared with jamming (J) and without jamming (WJ) conditions. Simulation result analysis specifies that secrecy performance is enhanced remarkably by CJ and PPA outperforms the FPA.

International Journal of Communication Systems•Apr 28, 2021•2 citations
In this work, the secrecy of a typical wireless cooperative dual-hop non-orthogonal multiple access (NOMA)-enabled decode-and-forward (DF) relay network is investigated with the impact of collaborative and non-collaborative eavesdropping. The system model consists of a source that broadcasts the multiplexed signal to two NOMA users via a DF relay, and information security against the eavesdropper nodes is provided by a helpful jammer. The performance metric is secrecy rate and ergodic secrecy capacity is approximated analytically. In addition, a differential evolution algorithm-based power allocation scheme is proposed to find the optimal power allocation factors for relay, jammer, and NOMA users by employing different jamming schemes. Furthermore, the secrecy rate analysis is validated at the NOMA users by adopting different jamming schemes such as without jamming (WJ) or conventional relaying, jamming (J), and with control jamming (CJ). Simulation results demonstrate the superiority of CJ over the J and WJ schemes. Finally, the proposed power allocation outperforms the fixed power allocation under all conditions considered in this work.
The reconfigurable intelligent surface (RIS) aided non-orthogonal multiple access (NOMA) network is applied to improve spectral efficiency and energy efficiency of wireless systems. Due to the incorporation of NOMA, RIS-aided NOMA system suffers from physical layer security (PLS) problem when an internal near user (NU) is the eavesdropper. In this case, it is difficult to always guarantee positive secrecy rate. Therefore, a scheme of artificial noise (AN) cooperative jamming and beamforming design is proposed against internal eavesdropper for RIS-aided NOMA in this paper. It is proved theoretically that the positive secrecy rate can be guaranteed if providing sufficient power. In addition, the power allocation of base station is further studied to minimize the total power consumption under the constraints of data rate and secrecy rate, and the closed-form solutions are achieved. Simulation results show that the performance of the proposed scheme is superior to the existing solutions.
Summary In this work, a new control jamming (CJ) scheme has been proposed for a cooperative nonorthogonal multiple access (NOMA) network with optimal power allocation factors by employing decode‐and‐forward (DF) relay. Maximization of secrecy rate at both NOMA users with the aid of CJ under total transmit power constraint is considered as an optimization problem. In this regard, invasive weed optimization (IWO) algorithm‐based approach is proposed to facilitate optimal power allocation for the considered network. In this analysis, performance metric secrecy rate is analyzed with CJ at both NOMA users by varying the location of eavesdropper with respect to the relay and jammer. In addition, the performance of fixed power allocation (FPA) and proposed power allocation (PPA) schemes is investigated with CJ and compared with jamming (J) and without jamming (WJ) conditions. Simulation result analysis specifies that secrecy performance is enhanced remarkably by CJ and PPA outperforms the FPA.