Full-Duplex Communications: Performance in Ultradense mm-Wave Small-Cell Wireless Networks

Yadav, Animesh; Tsiropoulos, Georgios I.; Dobre, Octavia A.

doi:10.1109/mvt.2018.2811644

Cited by 34 publications

(43 citation statements)

References 15 publications

(36 reference statements)

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“…At iteration κ + 1 of the proposed algorithm, the successive convex program follows as the proposed ICA-CR-PF algorithm to solve (12). Without loss of optimality, the constant penalty parameters can be uniformly selected through ̺ max{̺ d kj , ̺ u ℓm } k,j∈K, ℓ,m∈L , as proved in Appendix C. With an appropriate choice of ̺, the ICA-CR-PF algorithm provides an optimal solution to the original problem (11). Further discussions on the choice of the penalty parameter ̺ are given in Section VI-C.…”

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confidence: 99%

Joint Power Control and User Association for NOMA-Based Full-Duplex Systems

Nguyen

Dobre

et al. 2019

IEEE Trans. Commun.

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This paper investigates the coexistence of non-orthogonal multiple access (NOMA) and full-duplex (FD) to improve both spectral efficiency (SE) and user fairness. In such a scenario, NOMA based on the successive interference cancellation technique is simultaneously applied to both uplink (UL) and downlink (DL) transmissions in an FD system. We consider the problem of jointly optimizing user association (UA) and power control to maximize the overall SE, subject to user-specific quality-ofservice and total transmit power constraints. To be spectrally-efficient, we introduce the tensor model to optimize UL users' decoding order and DL users' clustering, which results in a mixed-integer nonconvex problem. For practically appealing applications, we first relax the binary variables and then propose two low-complexity designs. In the first design, the continuous relaxation problem is solved using the inner convex approximation framework. Next, we additionally introduce the penalty method to further accelerate the performance of the former design. For a benchmark, we develop an optimal solution based on brute-force search (BFS) over all possible cases of UAs. It is demonstrated in numerical results that the proposed algorithms outperform the conventional FD-based schemes and its half-duplex counterpart, as well as yield data rates close to those obtained by BFS-based algorithm. Index TermsFull-duplex radios, non-convex programming, non-orthogonal multiple access, self-interference, spectral efficiency, successive interference cancellation, user clustering.

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confidence: 99%

Joint Power Control and User Association for NOMA-Based Full-Duplex Systems

Nguyen

Dobre

et al. 2019

IEEE Trans. Commun.

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“…The work in [24] studied zero forcing and beam steering methods to mitigate the self-interference channel and highlighted the importance of more efficient methods to deal with the analog beamforming constraint on constant modulus. The authors in [25] aimed to minimize the total data queue buffer length in ultra-dense networks, and they have shown that the full-duplex outperformed half-duplex transmissions with an increasing density of small cell base stations. The work in [26] proposed hybrid beamforming for bidirectional full-duplex, and aimed to minimize the self-interference power.…”

Section: Related Workmentioning

confidence: 99%

“…We can solve the problem (25) in closed form using complex derivatives [35], whose optimal solution f BB ⋆ BS is…”

Section: Baseband Precoders Blockmentioning

confidence: 99%

1-bit Phase Shifters for Large-Antenna Full-Duplex mmWave Communications

Silva

Sabharwal

Fodor

et al. 2020

IEEE Trans. Wireless Commun.

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Millimeter-wave using large-antenna arrays is a key technological component for the future cellular systems, where it is expected that hybrid beamforming along with quantized phase shifters will be used due to their implementation and cost efficiency. In this paper, we investigate the efficacy of full-duplex mmWave communication with hybrid beamforming using lowresolution phase shifters. We assume that the self-interference can be sufficiently cancelled by a combination of propagation domain and digital self-interference techniques, without any analog self-interference cancellation. We formulate the problem of joint self-interference suppression and downlink beamforming as a mixed-integer nonconvex joint optimization problem. We propose LowRes, a near-to-optimal solution using penalty dual decomposition. Numerical results indicate that LowRes using low-resolution phase shifters perform within 3 % of the optimal solution that uses infinite phase shifter resolution. Moreover, even a single quantization bit outperforms half-duplex transmissions, respectively by 29 % and 10 % for both low and high residual selfinterference scenarios, and for a wide range of practical antenna to radio-chain ratios. Thus, we conclude that 1-bit phase shifters suffice for full-duplex millimeter-wave communications, without requiring any additional new analog hardware.

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“…With the deployment of fifth generation (5G) networks likely to occur in the near future, the role of unmanned aerial vehicles (UAVs) in 5G networks is expected be prominent. Already, diverse applications involving multi-UAV use cases have been envisaged, such as UAV-based cellular communications in disaster areas [1] and geographical surveying [2].…”

Section: Introductionmentioning

confidence: 99%

An Outage Probability Analysis of Full-Duplex NOMA in UAV Communications

Ernest

Madhukumar

Sirigina

et al. 2019

2019 IEEE Wireless Communications and Networking Conference (WCNC)

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As unmanned aerial vehicles (UAVs) are expected to play a significant role in fifth generation (5G) networks, addressing spectrum scarcity in UAV communications remains a pressing issue. In this regard, the feasibility of full-duplex non-orthogonal multiple access (FD-NOMA) UAV communications to improve spectrum utilization is investigated in this paper. Specifically, closed-form outage probability expressions are presented for FD-NOMA, half-duplex non-orthogonal multiple access (HD-NOMA), and half-duplex orthogonal multiple access (HD-OMA) schemes over Rician shadowed fading channels. Extensive analysis revealed that the bottleneck of performance in FD-NOMA is at the downlink UAVs. Also, FD-NOMA exhibits lower outage probability at the ground station (GS) and downlink UAVs than HD-NOMA and HD-OMA under low transmit power regimes. At high transmit power regimes, FD-NOMA is limited by residual SI and inter-UAV interference at the downlink UAVs and FD-GS, respectively. The impact of shadowing is also shown to affect the reliability of FD-NOMA and HD-OMA at the downlink UAVs.Index Terms-Unmanned Aerial Vehicle, Full-Duplex, NOMA, Outage Probability, Rician Shadowed Fading.

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Full-Duplex Communications: Performance in Ultradense mm-Wave Small-Cell Wireless Networks

Cited by 34 publications

References 15 publications

Joint Power Control and User Association for NOMA-Based Full-Duplex Systems

Joint Power Control and User Association for NOMA-Based Full-Duplex Systems

1-bit Phase Shifters for Large-Antenna Full-Duplex mmWave Communications

An Outage Probability Analysis of Full-Duplex NOMA in UAV Communications

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