Performance Analysis of Cooperative Full Duplex NOMA system in Cognitive Radio Networks

Babu, V. Santosh; Nagarajan, Deepan; Rebekka, B.

doi:10.1109/wispnet48689.2020.9198341

Cited by 10 publications

(7 citation statements)

References 12 publications

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“…Thus, the FD-CR-NOMA systems have attracted increasing attention in the literature, such as [26]- [28]. Especially, the works in [26], [27] considered the secondary and primary users as two NOMA users; thus, allocating power for these two users is challenging. Singh et al [28] analyzed an overlay cognitive system.…”

Section: Related Workmentioning

confidence: 99%

“…In CR systems, the interference from STs to the PRs must not exceed an allowed threshold ĨP . The interference constraints can be classified into three types [26]: (i) average interference constraint: ST has to adjust the average power so that the interference probability (interference power greater than ĨP ) at the input of PR is lower than a predefined threshold φ [27]; (ii) simultaneous interference constraint: the STs have to adjust the simultaneous transmission powers so that the interference power at PR does not exceed ĨP [28]; (iii) interference constraint based on the SINR at PR: ST has to adjust the transmission power so that the SINR at PR is always larger than a predefined threshold or the QoS of primary network is always ensured [29]. The interference constraint based on the SINR at PR requires that ST knows the CSI from PT to PR.…”

Section: A Transmission Power Constraintsmentioning

confidence: 99%

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Analysis of FD-NOMA Cognitive Relay System With Interference From Primary User Under Maximum Average Interference Power Constraint

Toan¹,

Van²,

Hoang³

et al. 2021

IEEE Access

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In this paper, we consider a non-orthogonal multiple access (NOMA) based underlay cognitive radio (CR) system consisting of a source, two destinations, and a relay in the secondary network. The source communicates with two destinations using the NOMA technique via the assistance of the relay operating in full-duplex (FD) mode. The operations of all secondary nodes are affected by the interference from a primary transmitter. Meanwhile, secondary transmitters must adjust their transmission powers so that the interference probability to a primary receiver is always less than a given value. Under this average interference power constraint, we propose the maximum average interference power (MAIP) constraint for the relay to achieve its highest possible average transmit power. Based on the MAIP constraint, we derive the exact closed-form expression of the outage probabilities and ergodic capacities at two destination users. Monte-Carlo simulations verify the accuracy of the obtained mathematical expressions. Numerical results show that the considered NOMA-FD-CR relay system's performance is significantly affected by the interference from the primary transmitter and the maximum tolerable interference of the primary receiver. Additionally, using the MAIP constraint at the relay substantially improves the quality of the received signal at the far user with a slight reduction in the signal quality at the near user and fulfills the interference constraint without needing the instantaneous channel state information (CSI).

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Section: Related Workmentioning

confidence: 99%

Section: A Transmission Power Constraintsmentioning

confidence: 99%

Analysis of FD-NOMA Cognitive Relay System With Interference From Primary User Under Maximum Average Interference Power Constraint

Toan¹,

Van²,

Hoang³

et al. 2021

IEEE Access

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“…With the promotion of 5G, Cognitive radio (CR) has gradually attracted researchers’ attention, which is regarded as an important technology to improve the spectrum utilization efficiency of 5G networks [ 1 ]. A cognitive radio is a wireless communication system that intelligently utilizes any available side information about the activity, channel conditions, codebooks, or messages of other nodes with which it shares the spectrum.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis and Optimization of a Cooperative Transmission Protocol in NOMA-Assisted Cognitive Radio Networks with Discrete Energy Harvesting

Wang

Shi

Tang

et al. 2021

Entropy

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In this paper, we propose a spectrum-sharing protocol for a cooperative cognitive radio network based on non-orthogonal multiple access technology, where the base station (BS) transmits the superimposed signal to the primary user and secondary user with/without the assistance of a relay station (RS) by adopting the decode-and-forward technique. RS performs discrete-time energy harvesting for opportunistically cooperative transmission. If the RS harvests sufficient energy, the system performs cooperative transmission; otherwise, the system performs direct transmission. Moreover, the outage probabilities and outage capacities of both primary and secondary systems are analyzed, and the corresponding closed-form expressions are derived. In addition, one optimization problem is formulated, where our objective is to maximize the energy efficiency of the secondary system while ensuring that of the primary system exceeds or equals a threshold value. A joint optimization algorithm of power allocation at BS and RS is considered to solve the optimization problem and to realize a mutual improvement in the performance of energy efficiency for both the primary and secondary systems. The simulation results demonstrate the validity of the analysis results and prove that the proposed transmission scheme has a higher energy efficiency than the direct transmission scheme and the transmission scheme with simultaneous wireless information and power transfer technology.

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“…The above-mentioned contributions were made for CWNs with NOMA and CWNs with FD operation are applied without considering the NOMA technology that by proper design the CS-NOMA scheme of the FD operation to improve secrecy performance. Although FD technology has indeed been conceived for NOMA systems for achieving secure communications, [28][29][30][31] the above research is not comprehensive enough. Security issues are not considered.…”

Section: Introductionmentioning

confidence: 99%

“…30 A scheme in which the SUs and PUs are paired according to the NOMA protocol and the users share a common relay for cooperative transmission is studied. 31 Due to the need to consider illegal eavesdropping by untrusted sensor users or eavesdropping users, the above work did not consider the zero-forcing beamforming (ZFB) design problems of the FD operation for improving the security of CS-NOMA system. To the best of our knowledge, few investigations have been conducted for improving the security of CS-NOMA using FD operation.…”

Section: Introductionmentioning

confidence: 99%

Physical layer security in cognitive NOMA sensor networks with full-duplex technique

Shang

Zhang

Tao

et al. 2021

International Journal of Distributed Sensor Networks

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This article studies the physical layer security in a downlink full-duplex cognitive non-orthogonal multiple access sensor networks (FD-C-NOMA). Compared with the existing works, this article proposes a FD-C-NOMA transmission scheme with a primary user (PU) and secondary user (SU) sensor nodes in the presence of an eavesdropper. The zero-forcing beamforming design problems of FD operation are investigated subject to the practical secrecy rate and the quality of services of PU. To characterize the security reliability trade-off of the FD-C-NOMA scheme, we first derive the closed-form expressions of connection outage probability (COP), the secrecy outage probability (SOP), and effective secrecy throughput (EST) of each SU in the NOMA networks. Then the impacts of the system parameters on the COP, SOP, and EST are investigated to evaluate the security and reliability in the FD-C-NOMA networks. Furthermore, in order to further verify the security and reliability of our considered network, an OMA scheme of FD operation is provided in the simulation for the purpose of comparison. Results demonstrate that the NOMA-based cognitive sensor networks of FD operation outperforms the OMA system in terms of EST. Finally, simulations are performed to validate the accuracy of our analysis results of the proposed scheme.

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Performance Analysis of Cooperative Full Duplex NOMA system in Cognitive Radio Networks

Cited by 10 publications

References 12 publications

Analysis of FD-NOMA Cognitive Relay System With Interference From Primary User Under Maximum Average Interference Power Constraint

Analysis of FD-NOMA Cognitive Relay System With Interference From Primary User Under Maximum Average Interference Power Constraint

Performance Analysis and Optimization of a Cooperative Transmission Protocol in NOMA-Assisted Cognitive Radio Networks with Discrete Energy Harvesting

Physical layer security in cognitive NOMA sensor networks with full-duplex technique

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