Outage Performance of NOMA-based DF Relay Sharing Networks over Nakagami-m Fading Channels

Ibraheem, Shady M.; Bedawy, Walid; Saad, Waleed; Shokair, Mona

doi:10.1109/icces.2018.8639196

Cited by 12 publications

(13 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The exact analytical expressions for the outage probability at each destination are derived under real-valued fading orders. In addition, the derived results can be utilized to extend results reported in [31]. • To further evaluate system performance, analysis in the high transmit power regime, i.e., asymptotic analysis and diversity order, are provided for additional insights.…”

Section: B Contributionmentioning

confidence: 98%

“…Furthermore, the implementation of NOMA was extended to cooperative UL/DL relay schemes (referred to as relay sharing NOMA) in [29], [30], where an intermediate relay was deployed to assist two pairs of source-destination nodes. An extention of [29] is done by [31], in which the authors assume Nakagami-m fading with integer shapes. As well-known fundamentals, the difference in users' channel conditions is crucial for realizing the potential of NOMA [32].…”

Section: A Related Workmentioning

confidence: 99%

“…Remark 3. With x 1 being decoded first, the defined probability P (φ 1 , φ 2 ; τ 1 , τ 2 ) can cover the analysis of the outage probability at the relay for the fixed-order decoder in [31]. Analogously, the term P (φ 2 , φ 1 ; τ 2 , τ 1 ) can be used for the case where x 2 being decoded first.…”

Section: ) Uplink Transmissionmentioning

confidence: 99%

See 2 more Smart Citations

Joint User Grouping and Decoding Order in Uplink/Downlink MISO/SIMO-NOMA

Nguyen

Ekin

et al. 2020

IEEE Access

View full text Add to dashboard Cite

In this paper, we design and investigate a novel uplink/downlink (UL/DL) non-orthogonal multiple access (NOMA) network using a common relay. Instead of successive interference cancellation (SIC) for UL/DL NOMA systems with fixed decoding order based on the statistical channel state information (CSI), we adopt the dynamic decoding order according to power level of received signals. Specifically, by exploiting the CSI-based dynamic decoding order, better fairness can be achieved and applicable. This decoding scheme is highly suitable for implementing a NOMA system in practice. The closed-form expressions for the users' outage probabilities are derived, and then an asymptotic analysis is carried out. Insightful discussions with diversity order are provided. Simulations are performed to corroborate the exactness of the theoretical analysis. INDEX TERMS uplink/downlink; non-orthogonal multiple access; outage probability; dynamic decoding order.

show abstract

Section: B Contributionmentioning

confidence: 98%

Section: A Related Workmentioning

confidence: 99%

See 1 more Smart Citation

Joint User Grouping and Decoding Order in Uplink/Downlink MISO/SIMO-NOMA

Nguyen

Ekin

et al. 2020

IEEE Access

View full text Add to dashboard Cite

show abstract

“…Cooperative communication is considered to be a promising technology in mobile communication networks, which can improve spectrum efficiency, power efficiency and expand network coverage [6]. NOMA based cooperative relay systems has been studied to further improve network performance [1], [7]- [12]. In [7], the authors proposed a cooperative NOMA scheme by utilizing the characteristic that users with good channel conditions can obtain the information of users with poor channel conditions in advance, which proved that the near user with better channel conditions can forward the information of the far user, acting as a relay.…”

Section: Introduction a Backgroundmentioning

confidence: 99%

“…The authors in [11] studied the outage performance of AF NOMA cooperative relay system and derived the asymptotic OP and diversity order. The effect of fading parameters and average channel coefficients on the system performance was investigated in [12] by deriving the OP and throughput of a cooperative NOMA network with DF relay over Nakagami-m fading channels.…”

Section: Introduction a Backgroundmentioning

confidence: 99%

Physical Layer Security of Cooperative NOMA for IoT Networks Under I/Q Imbalance

Zhao

Gao

et al. 2020

IEEE Access

View full text Add to dashboard Cite

In this paper, we investigate the reliability and security of cooperative dual-hop non-orthogonal multiple access (NOMA) for internet-of-thing (IoT) networks, in which the transceivers consider a detrimental factor of in-phase and quadrature-phase imbalance (IQI). The communication between the source and destination is accomplished through a decode-and-forward (DF) relay in the presence of an eavesdropper. In order to characterize the performance of the considered system, exact analytical expressions for the outage probability (OP) and intercept probability (IP) are derived in closed-form. Furthermore, to better understanding the performance of the considered system, we further derive the asymptotic expressions of OP in the high signal-to-noise ratio (SNR) regime and IP at the high main eavesdropping ratio (MER) region. A large number of analysis and Monte Carlo simulation results show that the existence of IQI usually increases the corresponding OP and reduces the IP, which means that reduces the reliability of the system and improves the security. In addition, the provided results provide useful insights into the trade-off between reliability and security of secure cooperative communication systems. INDEX TERMS Cooperative communication, in-phase and quadrature-phase imbalance, Internet-of-Things, physical layer security, non-orthogonal multiple access.

show abstract