VFD-NOMA Under Imperfect SIC and Residual Inter-Relay Interference Over Generalized Nakagami-m Fading Channels

Jose, Justin; Shaik, Parvez; Bhatia, Vimal

doi:10.1109/lcomm.2020.3030210

Cited by 20 publications

(14 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We assume that x 0 is known by m and n and the corresponding term related to the jamming signal can be eliminated in (8) and (9). (This is a common assumption in the jamming literature [24][25][26][27] where the pre-defined jamming signal can be generated by using some pseudorandom codes that are known to m and n but not available to the curious untrusted relay.…”

Section: System Modelmentioning

confidence: 99%

“…The authors in [7] propose an energy-efficient oriented algorithm for FD cooperative NOMA systems and demonstrate both significant energy-efficient and throughput enhancements over the HD cooperative NOMA and the prefixed FD cooperative NOMA regime. However, the significant amount of self-interference (SI) between transmitting and receiving radio frequency chains means that the performance of FD relay is degraded by the residual SI [8]. In [9], the authors provide a characterization of the distribution of the self-interference before and after active cancellation mechanisms.…”

mentioning

confidence: 99%

“…Alternatively, we may instead consider a distributed version of a FD system, called virtual FD (VFD), where a pair of HD relays receive and transmit signals successively to imitate the operation of FD relay. This idea inherits the benefits of the FD system, while each relay requires only a single antenna, and the physical separation between the two HD relays eliminates the SI problem perfectly [8]. The combination of NOMA and VFD will further improve the spectrum efficiency.…”

mentioning

confidence: 99%

See 2 more Smart Citations

On the performance of physical layer security in virtual full-duplex non-orthogonal multiple access system

Guo

Liu

2021

J Wireless Com Network

View full text Add to dashboard Cite

This paper investigates physical layer security analysis of cooperative non-orthogonal multiple access (NOMA) communication system. A virtual full-duplex (VFD) relaying scheme with an untrusted amplify-and-forward (AF) half-duplex (HD) relay and a trusted decode-and-forward (DF) HD relay is used in this system to improve the spectral efficiency. In order to prevent the untrusted relay from eavesdropping, a simple and practical cooperative jamming scheme is designed to confuse the untrusted relay. The exact expressions of effective secrecy throughput (EST) for NOMA users and approximate expression of EST for non-NOMA user are derived. All theoretical results are validated by numerical simulations which demonstrate that the proposed VFD-NOMA scheme is superior to existing HD-NOMA scheme in cooperative system and jamming plays an important role for obtaining acceptable EST. In addition, simulation results shows that the best secrecy performance highly depends on the system parameters such as transmit powers and jamming signal power.

show abstract

Section: System Modelmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

On the performance of physical layer security in virtual full-duplex non-orthogonal multiple access system

Guo

Liu

2021

J Wireless Com Network

View full text Add to dashboard Cite

show abstract

“…More involved network configurations have also been considered recently, e.g., system models encompassing relays (see [ 22 ] and references therein for an exhaustive literature survey). Relaying may either appear in the form of dedicated network elements, e.g., [ 22 , 23 ] or, alternatively, by means of user cooperation, e.g., [ 24 , 25 , 26 , 27 ]. In this framework, focusing on power-domain NOMA with SIC, the notion of virtual full-duplex (VFD) relaying [ 28 ] has gained particular interest as means to circumvent the implementation challenges of true full-duplex operation; see, e.g., [ 22 , 25 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

“…Relaying may either appear in the form of dedicated network elements, e.g., [ 22 , 23 ] or, alternatively, by means of user cooperation, e.g., [ 24 , 25 , 26 , 27 ]. In this framework, focusing on power-domain NOMA with SIC, the notion of virtual full-duplex (VFD) relaying [ 28 ] has gained particular interest as means to circumvent the implementation challenges of true full-duplex operation; see, e.g., [ 22 , 25 , 26 , 27 ]. The impact of imperfect SIC and residual inter-relay interference in this framework was also recently considered in [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

Beyond Equal-Power Sparse NOMA: Two User Classes and Closed-Form Bounds on the Achievable Region

Zaidel

Shental

Shamai

2022

Entropy

View full text Add to dashboard Cite

Non-orthogonal multiple access (NOMA) is a promising technology for future beyond-5G wireless networks, whose fundamental information-theoretic limits are yet to be fully explored. Considering regular sparse code-domain NOMA (with a fixed and finite number of orthogonal resources allocated to any designated user and vice versa), this paper extends previous results by the authors to a setting comprising two classes of users with different power constraints. Explicit rigorous closed-form analytical inner and outer bounds on the achievable rate (total class throughput) region in the large-system limit are derived and comparatively investigated in extreme-SNR regimes. The inner bound is based on the conditional vector entropy power inequality (EPI), while the outer bound relies on a recent strengthened version of the EPI. Valuable insights are provided into the potential performance gains of regular sparse NOMA in practically oriented settings, comprising, e.g., a combination of low-complexity devices and broadband users with higher transmit power capabilities, or combinations of cell-edge and cell-center users. The conditions for superior performance over dense code-domain NOMA (taking the form of randomly spread code-division multiple access), as well as a relatively small gap to the ultimate performance limits, are identified. The proposed bounds are also applicable for the analysis of interference networks, e.g., Wyner-type cellular models.

show abstract

ASER analysis of generalized hexagonal QAM schemes for NOMA systems over Nakagami‐m fading channels

Bisen

Shaik

Jose

et al. 2023

Int J Communication

Self Cite

View full text Add to dashboard Cite

To achieve high data rates expected from beyond 5G communications, higherorder modulation techniques have been explored. The energy-efficient modulation technique with a high data rate has encouraged researches towards an optimum two-dimensional hexagonal-shaped constellation, namely, hexagonal quadrature amplitude modulation (HQAM). Thus, in this work, we analyze the average symbol error rate (ASER) of HQAM schemes by considering a two-user nonorthogonal multiple access (NOMA) pair. Closed-form expressions for ASER of HQAM schemes for users are derived over generalized Nakagami-m fading channels. Further, for the HQAM constellation feasibility in two-user downlink NOMA systems, the power allocation criterion for the users is presented. Furthermore, the impact of modulation order of the users over the systems ASER analysis is investigated and valuable insights are drawn.

show abstract

VFD-NOMA Under Imperfect SIC and Residual Inter-Relay Interference Over Generalized Nakagami-m Fading Channels

Cited by 20 publications

References 12 publications

On the performance of physical layer security in virtual full-duplex non-orthogonal multiple access system

On the performance of physical layer security in virtual full-duplex non-orthogonal multiple access system

Beyond Equal-Power Sparse NOMA: Two User Classes and Closed-Form Bounds on the Achievable Region

ASER analysis of generalized hexagonal QAM schemes for NOMA systems over Nakagami‐m fading channels

Contact Info

Product

Resources

About