Beam‐domain SWIPT in massive MIMO system with energy‐constrained terminals

Xu, Kui; Shen, Zhexian; Wang, Yurong

doi:10.1049/iet-com.2018.5270

Cited by 11 publications

(12 citation statements)

References 40 publications

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“…1 Different from the previous works in [45,46], in this paper, the nonlinear energy harvesting model is applied, while in [45,46], the linear energy harvesting model is applied. A practical energy consumption model is applied in this paper.…”

Section: Endnotesmentioning

confidence: 99%

SWIPT in mMIMO system with non-linear energy-harvesting terminals: protocol design and performance optimization

Zhang

Liu

et al. 2019

J Wireless Com Network

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In this paper, we design the simultaneous wireless information and power transfer (SWIPT) protocol for massive multi-input multi-output (mMIMO) system with non-linear energy-harvesting (EH) terminals. In this system, the base station (BS) serves a set of uplink fixed half-duplex (HD) terminals with non-linear energy harvester. Considering the non-linearity of practical energy-harvesting circuits, we adopt the realistic non-linear EH model rather than the idealistic linear EH model. The proposed SWIPT protocol can be divided into two phases. The first phase is designed for terminals EH and downlink training. A beam domain energy beamforming method is employed for the wireless power transmission. In the second phase, the BS forms the two-layer receive beamformers for the reception of signals transmitted by terminals. In order to improve the spectral efficiency (SE) of the system, the BS transmit power-and time-switching ratios are optimized. Simulation results show the superiority of the proposed beam-domain SWIPT protocol on SE performance compared with the conventional mMIMO SWIPT protocols.

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Section: Endnotesmentioning

confidence: 99%

SWIPT in mMIMO system with non-linear energy-harvesting terminals: protocol design and performance optimization

Zhang

Liu

et al. 2019

J Wireless Com Network

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“…With ever‐increasing connected communication terminals, one of the key challenges in future wireless networks is energising the terminals for successful communications. In this regard, the radio frequency (RF) energy harvesting is one of the promising solutions because it can provide a sustainable and predictable energy supply compared with other natural sources such as wind and solar [1–4]. Recently, the technology of simultaneous wireless information and power transfer (SWIPT) has attracted considerable research interests as it can use the same RF signal to deliver information and energy concurrently.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous wireless information and power transfer for massive MIMO networks

et al. 2020

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“…To study the influence of line of sight (LOS) path, [19] investigated the downlink transmission of massive MIMO enabled SWIPT systems in Rician fading channels where PA, channel estimation duration and PS ratios were optimized to maximize the downlink sum rate and the minimum rate among all terminals respectively. In [20], the authors investigated the beam-domain SWIPT in a massive MIMO system in which the transmit power at BS and the TS ratios at all terminals were optimized under the constraints of the current available energy and minimum transmission rate of terminals for achieving maximum sum rate. In integrated data and energy communication networks, the authors optimized the resource allocation and PS ratios for uplink throughput maximization in [21].…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, the aforementioned studies [17][18][19][20][21] have been limited to investigating the system performance on the uplink or on the downlink via TS protocol or PS protocol. Moreover, [22] proposed a novel hybrid wireless EH protocol which is a combination of TS and PS protocols in wireless relay networks.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, [22] proposed a novel hybrid wireless EH protocol which is a combination of TS and PS protocols in wireless relay networks. Based on these observations and inspired by the analyses of [17][18][19][20][21][22], in this paper, we extend the existing system model from only uplink or downlink transmission to joint uplink and downlink transmission, and each terminal is equipped with the hybrid wireless EH protocol, which is a combination of TS protocol and PS protocol. Our aim is to investigate joint spectral efficiency (SE) of uplink and downlink with some practical constraints.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Joint Spectral Efficiency Optimization of Uplink and Downlink for Massive MIMO Enabled Wireless Energy Harvesting Systems

Sun

Liu

Qian

et al. 2020

Preprint

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This paper proposes a unified system model and uses a general wireless energy harvesting (EH) protocol in massive multiple-input multiple-output (MIMO) systems, in which the terminals have no fixed power supply and thus need to replenish energy via the received signals from the base station (BS). On the downlink, the BS delivers radio frequency (RF) signals to all terminals and each terminal coordinates the processes of EH and information decoding (ID) with wireless EH protocol. On the uplink, a fraction of the harvested energy is used for uplink pilot transmission and the remaining fraction is used for uplink data transmission. Closed-form lower bound expressions for each terminal are first obtained on the uplink and downlink, respectively. Based on these expressions, we then formulate the joint spectral efficiency (SE) of uplink and downlink maximization problem with some practical constraints. As the formulated optimization problem is non-linear and non-convex, it is hard to solve directly. To provide a solution, an iteration algorithm is proposed by utilizing one-dimensional search technique and successive approximation method based on geometric program (GP). Additionally, the convergence and complexity of the proposed algorithm are discussed as well. Finally, the feasibility of the proposed algorithm and analytical results are demonstrated by extensive computer simulations.

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Beam‐domain SWIPT in massive MIMO system with energy‐constrained terminals

Cited by 11 publications

References 40 publications

SWIPT in mMIMO system with non-linear energy-harvesting terminals: protocol design and performance optimization

SWIPT in mMIMO system with non-linear energy-harvesting terminals: protocol design and performance optimization

Simultaneous wireless information and power transfer for massive MIMO networks

Joint Spectral Efficiency Optimization of Uplink and Downlink for Massive MIMO Enabled Wireless Energy Harvesting Systems

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