Massive MIMO for Full-Duplex Cellular Two-Way Relay Network: A Spectral Efficiency Study

Fang, Zhaoxi; Ni, Wei; Liang, Feng; Shao, Pengfei; Wu, Yaohui

doi:10.1109/access.2017.2766079

Cited by 12 publications

(4 citation statements)

References 35 publications

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“…According to the sum-rate equation (8) and the power consumption model (15) , the EE of the downlink transmission can be expressed as…”

Section: Problem Formulationmentioning

confidence: 99%

“…Because of the importance of EE in massive MIMO systems, we have investigated the combination of massive MIMO and cooperative relaying systems with energy efficient structures for 5G and beyond cellular networks. Few papers have investigated the EE in a cellular massive MIMO relayaided network while the SE and the capacity of the system is usually examined; for example [15] investigates massive MIMO two-way relays in cellular networks. So in this paper we study the EE of a single-cell massive MIMO relay system and model the power allocation problem using a non-convex optimization problem.…”

Section: Introductionmentioning

confidence: 99%

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Improving Energy Efficiency of Massive MIMO Relay Systems using Power Bisection Allocation for Cell-Edge Users

Koolivand

Bahonar

Fazel

2019

2019 27th Iranian Conference on Electrical Engineering (ICEE)

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This paper studies downlink energy efficiency (EE) of a cellular massive Multiple Input Multiple Output (MIMO) system with massive number of antennas at both base station (BS) and relay considering cell-edge users which is less investigated in the literature. Some improving methods for base station (BS) and relay power allocation under quality of service constraints are proposed. The EE optimization problem is provided over BS and relay power variables (power dimensions). Considering the quasi-concavity property of the EE function relative to each power variable, we propose to use a power bisection algorithm (PBA) in one dimension, followed by the exhaustive search in the other dimension (ODS algorithm) which is called PB-ODS algorithm and also a method to limit the range of power variables. The results show that the performance of the PB-ODS algorithm approaches the performance of optimal solution which is exhaustive search in both dimensions while it has a lower complexity. In addition to that we suggest to use the PBA in two dimensions alternatively as the sub-optimal alternative optimization (AOP) algorithm. The complexity can highly be reduced using the AOP algorithm with a slight but acceptable degradation in performance which makes the algorithm much suitable for practical use.

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“…According to the sum-rate equation (8) and the power consumption model (15) , the EE of the downlink transmission can be expressed as…”

Section: Problem Formulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improving Energy Efficiency of Massive MIMO Relay Systems using Power Bisection Allocation for Cell-Edge Users

Koolivand

Bahonar

Fazel

2019

2019 27th Iranian Conference on Electrical Engineering (ICEE)

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“…Furthermore, the impact of co-channel interference (CCI) and pilot contamination were considered in [27] to investigate the achievable performance of the MTW-MMR system operated in the HD mode. Later, the authors in [28] presented a FD-assisted massive MIMO two-way relay cellular network, and compared its achievable performance with the HD relaying mode. Similarly, in [29], the performance of the FD-assisted TW-MMR system with MRC/MRT relay processing operated under either the FD mode or the HD mode was studied and compared, when four power-scaling cases were considered.…”

Section: Introductionmentioning

confidence: 99%

Spectral- and Energy-Efficiency of Multi-Pair Two-Way Massive MIMO Relay Systems Experiencing Channel Aging

Yang

et al. 2019

IEEE Access

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In this paper, we demonstrate the impact of channel aging on the spectral-and energyefficiency performance of the multi-pair two-way massive MIMO relay (MTW-MMR) systems, where massive antennas are deployed at the relay and the amplify-and-forward (AF) protocol is operated. By assuming the maximum-ratio combining/maximum-ratio transmission (MRC/MRT) or zero-forcing reception/ zero-forcing transmission (ZFR/ZFT) relaying processing, we analyze the spectral efficiency (SE) and energy efficiency (EE) of the MTW-MMR systems experiencing both imperfect channel estimation and channel aging based on the four proposed power-scaling schemes. Furthermore, we compare the performance of the full-duplex (FD)-assisted MTW-MMR systems with that of the half-duplex (HD)-assisted MTW-MMR systems, showing that the FD mode outperforms the HD mode with the interference level not exceeding −15 dB. Our studies show that channel aging may significantly degrade the achievable performance in terms of SE and EE. However, the inter-pair interference caused by the other user pairs and the self-interference can be effectively mitigated by the MRC/MRT processing or ZFR/ZFT processing at the relay. INDEX TERMSMassive MIMO, two-way relay, full-duplex, half-duplex, channel aging, maximum-ratio combining/maximum-ratio transmission, zero-forcing reception/zero-forcing transmission, spectralefficiency, energy-efficiency.

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“…Obviously, it is difficult to achieve such simultaneous FD transmission of up and down access links in the HetNets adopted in some works when the backhaul between SBSs and MBSs is also required. Moreover, in some cases where the user terminals also operate in FD, it is required that BSs transmit and receive signals to or from user terminals with the FD mode. As a result, in this case, the SBSs cannot exchange backhaul with MBSs over the same frequency bands.…”

Section: Introductionmentioning

confidence: 99%

Effective self‐backhaul scheme for massive MIMO–enabled full‐duplex heterogeneous networks by exploiting NOMA

Jia

Yang

et al. 2019

Trans Emerging Tel Tech

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By integrating full‐duplex (FD) and nonorthogonal multiple‐access (NOMA) techniques for wireless self‐backhaul at small‐cell base stations (SBSs), a novel multitier heterogeneous network (HetNet) is proposed. In the HetNet, NOMA is used at SBSs for combing backhaul and downlink (DL) signals. As a result, at each SBS, the backhaul, uplink transmission, and DL transmission are executed simultaneously, whereas the FD macro base stations (MBSs) communicate with mobile users (MUs) and transceive backhaul signals from associated SBSs by using massive‐MIMO antennas. The simple time‐division duplex is performed for the communications between MBSs and MUs so that a round of communications consists of MBS‐MU‐DL and MBS‐MU‐UL phases. This work particularly focuses on the MBS‐MU‐DL phase. By assuming the HetNet to be fully loaded, this paper first models the distribution of active SBSs and those of the interference received at the different types of receivers. Then, by formulating the received signal‐to‐interference ratios, this paper obtains the coverage probabilities of the MU‐SBS‐MBS uplink backhaul and MU DLs as well as the spectrum and energy efficiencies. The presented simulations and numerical results show that the integration of FD and NOMA at SBSs is an effective solution for creating the backhaul between FD‐SBS and FD‐MBS. It is obtained that when the power‐sharing coefficient allocated for a small‐cell DL is small, the coverage probability of SBS DL transmission increases; otherwise, it decreases. However, the coverage probabilities of the MBS DL and MU‐SBS‐MBS backhaul link monotonically vary with the power‐sharing coefficient. It is also achieved that the power‐sharing coefficient imposes the effect on the energy efficiencies of the MU‐SBS‐MBS backhaul link and MU DL in inverse directions. At the same time, it is found that the achieved energy efficiency gain depends greatly on the resolution of massive‐MIMO antennas.

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Massive MIMO for Full-Duplex Cellular Two-Way Relay Network: A Spectral Efficiency Study

Cited by 12 publications

References 35 publications

Improving Energy Efficiency of Massive MIMO Relay Systems using Power Bisection Allocation for Cell-Edge Users

Improving Energy Efficiency of Massive MIMO Relay Systems using Power Bisection Allocation for Cell-Edge Users

Spectral- and Energy-Efficiency of Multi-Pair Two-Way Massive MIMO Relay Systems Experiencing Channel Aging

Effective self‐backhaul scheme for massive MIMO–enabled full‐duplex heterogeneous networks by exploiting NOMA

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