Transmit beamformer based performance analysis and diversity gains of cell edge user in cooperative MISO-NOMA system

Ghous, Mujtaba; Abbas, Ziaul Haq; Abbas, Ghulam; Hassan, Ahmad Kamal; Moinuddin, Muhammad

doi:10.1016/j.phycom.2020.101102

Cited by 5 publications

(10 citation statements)

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“…We consider that the BS, user-A, and user-B are all in a straight line. This assumption has been widely adopted in cooperative NOMA networks [ 39 , 41 ]. The reason behind this assumption is to discuss the effect of position of user-A on the performance of the two-hop cooperative NOMA systems, where user-A moves along BS to user-B link.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…Unless stated otherwise, the values of simulation parameters used are mentioned in Table 1 , which are extensively used in other works on MISO-NOMA. These parameters are loosely adopted from in [ 38 , 39 ].…”

Section: Numerical Resultsmentioning

confidence: 99%

Section: Numerical Resultsmentioning

confidence: 99%

“…Last, Figure 8 presents a comparison of our proposed model with transmit beamformer-based technique [ 39 ] for the analysis of the outage probability of user-B in a similar network configuration. The main difference between the proposed work and the work in [ 39 ] is the general channel model. The physical layer security in MISO-NOMA system in the presence of an eavesdropper and secure communication criteria for the legitimate users is discussed in our work, which was not addressed in [ 39 ].…”

Section: Numerical Resultsmentioning

confidence: 99%

“…In this time slot, the Eve has the capability to listen to message signal of user-B. The information received from user-A to Eve is written by using the expression (7) from in [ 39 ] as follows:

where

is the re-encoded version of

, and

is the power of user-A harvested in the first time slot, and thus through this power, the cooperative relaying transmission takes place. The value of

is obtained from the expression (7) of [ 39 ].…”

Section: System Modelmentioning

confidence: 99%

See 4 more Smart Citations

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

Ghous

Abbas

Hassan

et al. 2021

Sensors

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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.

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Section: Numerical Resultsmentioning

confidence: 99%

Section: Numerical Resultsmentioning

confidence: 99%