Performance Analysis for Downlink MIMO-NOMA in Millimeter Wave Cellular Network with D2D Communications

Li, Jianguo; Li, Xiangming; Wang, Aihua; Ye, Neng

doi:10.1155/2019/1914762

Cited by 14 publications

(8 citation statements)

References 42 publications

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“…In [2], the authors studied the outage probability and the ergodic capacity in downlink MIMO-NOMA at mmWave cellular network with D2D communications. Analytical results indicated that NOMA outperforms time division mul-tiple access (TDMA).…”

Section: B Related Workmentioning

confidence: 99%

“…, G. Here, CU E(g, k) denotes that the CUE is served by the g-th beam with sequence k in that beam, where |S g | ≥ 1 and S i ∩S j = φ for i = j. According to NOMA, the BS transmits a superimposed signal X g for all K CUEs in the g-th cluster via g-th beam [2] [23], and X g can be expressed as…”

Section: A Noma Signalmentioning

confidence: 99%

“…Monthly global mobile data traffic will reach 77 exabytes per month in 2022, and this trend will continue, as estimated by Cisco [1]. As this growth occurs, the demands for high data rate, low latency, and highly reliable wireless communications are dramatically increasing [2]. Fifth-generation (5G) cellular networks have promised to satisfy these demands for future applications and services.…”

Section: Introductionmentioning

confidence: 99%

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User Clustering and Optimized Power Allocation for D2D Communications at mmWave Underlaying MIMO-NOMA Cellular Networks

2021

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Fifth-generation (5G) cellular networks are being developed to meet the ever-growing data traffic across mobile devices and their applications. The core of 5G cellular networks is leveraging wider and higher frequencies available at millimeter wave frequency (mmWave) bands, thus providing very high data rates for mobile devices. Multi-input multi-output (MIMO) is an essential technology for overcoming the high propagation loss at mmWave communications. In non-orthogonal multiple access (NOMA), multiple cellular user equipments (CUEs) communicate over the same time-frequency resources using a multiplexed power domain. In device-to-device (D2D) communications, two D2D user equipments (DUEs) communicate without passing through the base station. In the underlaying scenario, DUEs reuse the frequency resources allocated to CUEs for spectrum utilization but DUEs cause interferences for cellular and D2D communications. Integrating D2D communications with other 5G technologies has great potential for spectral efficiency improvement. Unfortunately, interference management and resource allocation are becoming increasingly challenging due to aggressive frequency reuse. In this paper, D2D communications at mmWave underlaying MIMO-NOMA cellular network system model is developed. Consequently, a novel resource allocation for D2D communications underlaying MIMO-NOMA cellular network is proposed. A resource allocation optimization problem is formulated for spectral efficiency maximization. To solve this NP-hard problem, the problem is decomposed into three subproblems: interference-aware graph-based user clustering, MIMO-NOMA beamforming design, and optimized power allocation based on particle swarm optimization. Simulation results demonstrate that the proposed algorithm for D2D communications at mmWave underlaying MIMO-NOMA cellular network delivers a greater spectral efficiency compared to the conventional D2D communications that operate underlay MIMO-orthogonal multiple access cellular networks.

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Section: B Related Workmentioning

confidence: 99%

Section: A Noma Signalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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User Clustering and Optimized Power Allocation for D2D Communications at mmWave Underlaying MIMO-NOMA Cellular Networks

2021

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“…In [4], the coverage probability, the average number of served users, and the sum rate of NOMA were studied for the cooperative multicast mmWave wireless networks over Nakagami-m fading channels. In [5], the OP and the ergodic capacity (EC) were investigated in downlink MIMO-NOMA mmWave cellular networks with D2D communications over Nakagami-m fading channels. However, the small-scale fading effects in these considered mmWave communication scenarios were modeled by using Nakagami-m fading or some other simplified fadings.…”

Section: Introductionmentioning

confidence: 99%

On NOMA-Based mmWave Communications

Tian

Pan

Alouini

2020

IEEE Trans. Veh. Technol.

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Non-orthogonal multiple access (NOMA) and millimeter-wave (mmWave) communication are two promising techniques to increase the system capacity in the fifth-generation (5G) mobile network. The former can achieve high spectral efficiency by modulating the information in power domain and the latter can provide extremely large spectrum resources. Fluctuating two-ray (FTR) channel model has already been proved to accurately agree with the small-scale fading effects in mmWave communications in experiments. In this paper, the performance of NOMA-based communications over FTR channels in mmWave communication systems is investigated in terms of outage probability (OP) and ergodic capacity (EC). Specifically, we consider the scenario that one base station (BS) transmits signals to two users simultaneously under NOMA scheme. The BS and users are all equipped with a single antenna. Two power allocation strategies are considered: the first one is a general (fixed) power allocation scheme under which we derive the OP and EC of NOMA users in closed form; the other one is an optimal power allocation scheme that can achieve the maximum sum rate for the whole system. Under the second scheme, not only the closed-form OP and EC but also the upper and lower bounds of EC are derived. Furthermore, we also derive the asymptotic expression for the OP in high average SNR region to investigate the diversity order under these two schemes. Finally, we show the correctness and accuracy of our derived expressions by Monte-Carlo simulation.

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“…The applications of millimeter wave (mmWave) communication have become the essential technology for Fifth-Generation (5G) and beyond wireless communications systems [7], [8]. Thus, many researchers have been paying attention to the research where NOMA system is integrated with multiple-antenna beamforming techniques in mmWave channel [9]- [13]. By exploiting the degree of freedom in spatial-domain in addition to the advantage of NOMA, groups of users can be supported by NOMA spatially in different beams [5], [6].…”

Section: Introductionmentioning

confidence: 99%

Impact of Mutual Coupling on Power-Domain Non-Orthogonal Multiple Access (NOMA)

et al. 2020

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This paper investigates the impact of mutual coupling (MC) on the achievable sum-rate of power-domain non-orthogonal multiple access (NOMA) system in both uplink (UL) and downlink (DL) transmissions. We assume a single-antenna user NOMA system with directional beamforming in the millimeter wave (mmW) channel. Due to the electromagnetic interaction between the antenna elements, called mutual coupling, at the base station (BS), the steering vector of the channel is affected. Consequently, this leads to distorted antenna pattern pointing towards different directions and reduction in channel gain, based on antenna array structure. In this paper, different antenna geometries and configurations, such as onedimensional (1D) uniform linear array (ULA), two-dimensional (2D), and three-dimensional (3D) uniform circular array (UCA), are implemented at the BS, where induced electromotive force (EMF) and method of moment (MOM) techniques are used to generate the MC coefficients. We first examine the antenna patterns affected by MC, followed by channel gains of user terminals (UT)s. Then sum-rate of the NOMA system is modified in the presence of MC. Furthermore, mutual coupling is compensated successfully for both UL and DL systems for the given antenna structures. Simulation results show that mutual coupling degrades the sum-rate performance of the NOMA system in all three array structures, especially in the UCA structure due to the smaller spacing of the array element in a circular shape, resulting in symmetric mutual coupling from both sides of the circle. On the other hand, it is also shown that compensating the mutual coupling effect by the MOM technique in the case of unknown MC or matrix inversion in the case of known MC significantly improves the system sum-rate in all scenarios. INDEX TERMS Non-orthogonal multiple access (NOMA), multiuser beamforming, millimeter wave, sum-rate, mutual coupling (MC), uniform linear array (ULA), uniform circular array (UCA), 3D UCA.

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Performance Analysis for Downlink MIMO-NOMA in Millimeter Wave Cellular Network with D2D Communications

Cited by 14 publications

References 42 publications

User Clustering and Optimized Power Allocation for D2D Communications at mmWave Underlaying MIMO-NOMA Cellular Networks

User Clustering and Optimized Power Allocation for D2D Communications at mmWave Underlaying MIMO-NOMA Cellular Networks

On NOMA-Based mmWave Communications

Impact of Mutual Coupling on Power-Domain Non-Orthogonal Multiple Access (NOMA)

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