Efficient Allocation for Downlink Multi-Channel NOMA Systems Considering Complex Constraints

Xu, Zhengjia; Petrunin, Ivan; Li, Teng; Tsourdos, Antonios

doi:10.3390/s21051833

Cited by 6 publications

(5 citation statements)

References 36 publications

(42 reference statements)

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“…If the input scale is large, (2) a random algorithm can accurately solve the problem with a high probability in polynomial time or (3) an approximate solution for the problem can be obtained in polynomial time. In [27], other approximate schemes are also mentioned. The central concept is to adopt the random sampling of sub-channels with probability ρ to avoid the traversal search.…”

Section: Fully Polynomial Time Approximation Program Based On Dynamic Programming (Dp-fpta)mentioning

confidence: 99%

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Optimization Algorithms for Joint Power and Sub-Channel Allocation for NOMA-Based Maritime Communications

Zhou

2021

Entropy

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This paper investigates resource optimization schemes in a marine communication scenario based on non-orthogonal multiple access (NOMA). According to the offshore environment of the South China Sea, we first establish a Longley–Rice-based channel model. Then, the weighted achievable rate (WAR) is considered as the optimization objective to weigh the information rate and user fairness effectively. Our work introduces an improved joint power and user allocation scheme (RBPUA) based on a single resource block. Taking RBPUA as a basic module, we propose three joint multi-subchannel power and marine user allocation algorithms. The gradient descent algorithm (GRAD) is used as the reference standard for WAR optimization. The multi-choice knapsack algorithm combined with dynamic programming (MCKP-DP) obtains a WAR optimization result almost equal to that of GRAD. These two NOMA-based solutions are able to improve WAR performance by 7.47% compared with OMA. Due to the high computational complexity of the MCKP-DP, we further propose a DP-based fully polynomial-time approximation algorithm (DP-FPTA). The simulation results show that DP-FPTA can reduce the complexity by 84.3% while achieving an approximate optimized performance of 99.55%. This advantage of realizing the trade-off between performance optimization and complexity meets the requirements of practical low-latency systems.

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Section: Fully Polynomial Time Approximation Program Based On Dynamic Programming (Dp-fpta)mentioning

confidence: 99%

“…Due to the high complexity of this program, it can only be regarded as an optimization reference index. However, the solutions provided in [27] reduce the complexity by discretizing the power value to achieve the approximate optimal performance.…”

Section: Introductionmentioning

confidence: 99%

Optimization Algorithms for Joint Power and Sub-Channel Allocation for NOMA-Based Maritime Communications

Zhou

2021

Entropy

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“…The performance of multihop, FD, and NOMA systems was studied widely in [ 21 , 22 , 23 , 24 , 25 , 26 , 27 ]. Xu and others proposed three solutions, namely, stochastic algorithm, two-stage greedy randomized adaptive search, and two-stage stochastic sample to maximize sum-rate by jointly optimizing the channel and power allocation [ 21 ]. The outage probability (OP) and ergodic capacity of the NOMA systems combined with full-duplex relaying were derived in [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Multihop Full-Duplex NOMA Systems with Imperfect Interference Cancellation and Near-Field Path-Loss

Phan

Nguyen

et al. 2023

Sensors

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Outage probability (OP) and potential throughput (PT) of multihop full-duplex (FD) nonorthogonal multiple access (NOMA) systems are addressed in the present paper. More precisely, two metrics are derived in the closed-form expressions under the impact of both imperfect successive interference cancellation (SIC) and imperfect self-interference cancellation. Moreover, to model short transmission distance from the transmit and receive antennae at relays, the near-field path-loss is taken into consideration. Additionally, the impact of the total transmit power on the performance of these metrics is rigorously derived. Furthermore, the mathematical framework of the baseline systems is provided too. Computer-based simulations via the Monte Carlo method are given to verify the accuracy of the proposed framework, confirm our findings, and highlight the benefits of the proposed systems compared with the baseline one.

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“…Similarly, other users decode their signals. The furthest weak user does not receive the high power signals of other users; therefore, it considers the power of others users with the better channel conditions as noise to decode its own signal [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

“…To permit an effective Dynamic Power and Channel Allocation (DPCA) in the DL multi-channel NOMA (MC-NOMA) systems [ 26 ], the optimization as the combinative problem, and offers three investigative solutions, i.e., two-stage Greedy Randomized Adaptive Search (GRASP), stochastic algorithm, and two-stage Stochastic Sample greeDy (SSD). For shortage of frequency band resources, a Terrestrial-Satellite Integrated Network (TSIN) for ground users in [ 35 ] is evaluated with NOMA.…”

Section: Introductionmentioning

confidence: 99%

Interference Management with Reflective In-Band Full-Duplex NOMA for Secure 6G Wireless Communication Systems

Khan

Tsiga

Asif

2022

Sensors

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The electromagnetic spectrum is used as a medium for modern wireless communication. Most of the spectrum is being utilized by the existing communication system. For technological breakthroughs and fulfilling the demands of better utilization of such natural resources, a novel Reflective In-Band Full-Duplex (R-IBFD) cooperative communication scheme is proposed in this article that involves Full-Duplex (FD) and Non-Orthogonal Multiple Access (NOMA) technologies. The proposed R-IBFD provides efficient use of spectrum with better system parameters including Secrecy Outage Probability (SOP), throughput, data rate and secrecy capacity to fulfil the requirements of a smart city for 6th Generation (6thG or 6G). The proposed system targets the requirement of new algorithms that contribute towards better change and bring the technological revolution in the requirements of 6G. In this article, the proposed R-IBFD mainly contributes towards co-channel interference and security problem. The In-Band Full-Duplex mode devices face higher co-channel interference in between their own transmission and receiving antenna. R-IBFD minimizes the effect of such interference and assists in the security of a required wireless communication system. For a better understanding of the system contribution, the improvement of secrecy capacity and interference with R-IBFD is discussed with the help of SOP derivation, equations and simulation results. A machine learning genetic algorithm is one of the optimization tools which is being used to maximize the secrecy capacity.

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Efficient Allocation for Downlink Multi-Channel NOMA Systems Considering Complex Constraints

Cited by 6 publications

References 36 publications

Optimization Algorithms for Joint Power and Sub-Channel Allocation for NOMA-Based Maritime Communications

Optimization Algorithms for Joint Power and Sub-Channel Allocation for NOMA-Based Maritime Communications

Performance Analysis of Multihop Full-Duplex NOMA Systems with Imperfect Interference Cancellation and Near-Field Path-Loss

Interference Management with Reflective In-Band Full-Duplex NOMA for Secure 6G Wireless Communication Systems

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