Two-Way Relaying Non-Orthogonal Multiple Access With Imperfect Successive Interference Cancellation in Power Line Communications

Ahiadormey, Roger Kwao; Anokye, Prince; Park, Seok-Hwan; Lee, Kyoung-Jae

doi:10.1109/ojcoms.2020.3039255

Cited by 13 publications

(7 citation statements)

References 48 publications

(121 reference statements)

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“…However, the 2T-NOMA-TWRN has been identified as the sole candidate in the field of NOMA-TWRN because of its pioneering aspect, and more importantly, the absence of a comprehensive study that covers both the OMA and NOMA-based transmission schemes in the realm of the 3T-TWRN. Consequently, this scheme has been widely used in various NOMA-TWRNbased scenarios [17]- [19], [28]- [33]. Therefore, since the performance of the 2T-NOMA-TWRN scheme highly depends on the interference level, while this concern does not exist in both the OMA and NOMA-based 3T-TWRN schemes, a comprehensive comparison among these schemes is extremely needed.…”

Section: B Motivation and Contribution Of The Papermentioning

confidence: 99%

Performance Analysis of NOMA-Based Transmission in Two-Way Relay Network

Hesam,

Bastami,

Abdel-Hafez

2024

IEEE Access

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In this paper, we study the performance of the two-way relay network (TWRN) with NOMAbased transmission, where the information is exchanged during three time slots. To provide a fair comparison, we also examine the performance of a three-time-slot (3T) OMA-based transmission scheme. In the following, these schemes are referred to as 3T-NOMA-TWRN and 3T-OMA-TWRN. In the 3T-NOMA-TWRN scheme, each transceiver simultaneously transmits two symbols with different powers to exploit the multiplexing gain, implemented through the power-domain NOMA technique. The performance of both schemes is analyzed in terms of the outage probability, the ergodic sum-rate, and their asymptotic behaviors. The outage and rate performances of the schemes are enhanced by optimizing the power allocation coefficients, especially in the NOMA-based scheme. The proposed power allocation algorithm imposes negligible overhead because of considering the closed-form expressions of the outage probability and the ergodic sum-rate as the objective function. For the NOMA-based scheme, we propose sub-optimal power allocation strategies that closely approximate the optimal solution. The validity of the analytical results is confirmed by extensive numerical examples. The results show that the 3T-NOMA-TWRN scheme outperforms its OMAbased counterpart in terms of the outage probability and the ergodic sum-rate, especially in the high-rate and high-SNR regimes. Additionally, the 3T-NOMA-TWRN scheme significantly outperforms the existing twotime-slot (2T)-NOMA-TWRN scheme in the high-SNR regime. However, in the low-SNR regime, only in some cases, the situation changes in favor of the 2T-NOMA-TWRN scheme. Surprisingly, the performance of the 3T-OMA-TWRN scheme can significantly surpass that of the 2T-NOMA-TWRN scheme in certain situations, depending on the rate and SNR regimes and the network geometry. Furthermore, the 3T-NOMA-TWRN scheme significantly reduces the TWRN performance sensitivity to the location of relay node, which is a critical concern in both the 3T-OMA-TWRN and 2T-NOMA-TWRN schemes, especially in the latter case.INDEX TERMS Non-orthogonal multiple access (NOMA), power allocation, superposition coding, successive interference cancelation, two-way relay network (TWRN).

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Section: B Motivation and Contribution Of The Papermentioning

confidence: 99%

Performance Analysis of NOMA-Based Transmission in Two-Way Relay Network

Hesam,

Bastami,

Abdel-Hafez

2024

IEEE Access

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“…Ahiadormey et al 30 studied the application of combined NOMA‐MIMO in power line communications. In this communication, the users transfer the information through the two relays, considering the interference cancelation and the performance evaluations for power line communication log‐normal channels affected by the impulse noise.…”

Section: Related Workmentioning

confidence: 99%

An effective combination of terahertz band NOMA and MIMO system for power efficiency enhancement

Chandra

Borugadda²

2022

Int J Communication

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Terahertz (THz) band communication is extensively used to reach future communication needs for large capacity. Moreover, the multiple input multiple output (MIMO) and Non-orthogonal multiple access (NOMA) approach with multi-antenna enable users to share more data with good spectrum efficiency.Due to its various applications, different research works are done in MIMO and NOMA. But the existing approach used in NOMA-MIMO has a major limitation in power efficiency. Hence, this research work is presented for maximizing power efficiency. The power efficiency is improved effectively using the THz-NOMA-MIMO system in the presented approach. Initially, users are clustered effectively by utilizing the enhanced fuzzy c-means clustering (EFCM) approach. Afterwards, hybrid precoding with threshold orthogonal matching pursuit (TOMP) approach is presented for generating the hybrid precoding vectors. Here, optimal precoding vectors are generated using the geometric distance-based TOMP approach. This process eliminates the interference present in the data communication, thus improving power and spectral efficiency. Finally, the weight-based distributed power efficient algorithm (WDPEA) achieves the finest power allocation. These combinations of effective approaches enhance the power and spectral efficiency. The presented methodology is implemented in the working platform of MATLAB. The performance of the presented approach is examined with the different existing approaches in regards to spectral efficiency, energy efficiency, effective capacity, and the mean squared error. When the users are at 20, the sum spectral efficiency of existing zero forcing (ZF) is 21, regularized zero forcing (RZF) is 54, maximum ratio transmission (MRT) is 71, and the proposed method is 77 bit/s/Hz. When the signal to noise ratio at 25 dB, the energy efficiency of existing time division multiple access (TDMA) is 1.24, digital MIMO is 1.21, orthogonal multiple access (OMA) is 1.23, weighted NOMA is 1.35, and the proposed method is 1.38 bit/joule/Hz. The proposed method gets better results when compared to other methods.

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“…Performance comparisons show that NOMA exhibit reduced outages than OMA but residual interference leads to error floors and zero diversity. Then, the paper in Reference 17 investigates two‐way power line relay communication with imperfect SIC. NOMA is shown to surpass OMA's outage and ergodic rate performance, even though a rate ceiling exists due to imperfect SIC.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of power‐domain non‐orthogonal multiple access for full‐duplex two‐way relaying

Özduran

Mahmood

Νομικός

2022

Trans Emerging Tel Tech

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Non‐orthogonal multiple has the potential to improve the connectivity of wireless networks by simultaneously allowing users and devices to access the wireless medium. Meanwhile, full‐duplex communication can increase the spectral efficiency of the network as transmission and reception are concurrently performed. This article investigates full‐duplex two‐way relay communication relying on non‐orthogonal multiple access in the power‐domain. More specifically, users exchange superimposed signals and perform reception by utilizing echo‐cancellation and successive interference cancellation. For this setup, an extensive theoretical analysis is conducted, in terms of outage probability, error probability, ergodic rate, and throughput. Furthermore, by using the Lagrangian multiplier, optimal transmit power, and power allocation coefficients are determined and the relay's position is optimized to improve network performance. Our theoretical findings are verified through Monte‐Carlo simulations while significant performance gains in the optimized network case are observed.

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Two-Way Relaying Non-Orthogonal Multiple Access With Imperfect Successive Interference Cancellation in Power Line Communications

Cited by 13 publications

References 48 publications

Performance Analysis of NOMA-Based Transmission in Two-Way Relay Network

Performance Analysis of NOMA-Based Transmission in Two-Way Relay Network

An effective combination of terahertz band NOMA and MIMO system for power efficiency enhancement

Performance analysis of power‐domain non‐orthogonal multiple access for full‐duplex two‐way relaying

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