Joint Beamforming and Power Allocation for Multiuser MISO Broadcast Channel SWIPT Employing OFDM

Ketcham,; Verdyck, Jeroen; Moonen, Marc

doi:10.1109/access.2021.3132769

Cited by 2 publications

(2 citation statements)

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“…In most previous research [18][19][20][21], the energy harvested by the kth sensor has been determined by the following linear model:…”

Section: Non-linear Eh Modelmentioning

confidence: 99%

High-Efficiency Power Optimization Based on Reconfigurable Intelligent Surface for Nonlinear SWIPT System

Zheng

et al. 2022

Electronics

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This paper presents an investigation of the transmitting power consumption of a base station (BS) in a simultaneous wireless information and power transfer (SWIPT) system enhanced by a reconfigurable intelligent surface (RIS). The aim is to optimize the total transmitting power consumption when sending information signals and energy from the BS to ground sensors. To this end, the transmitting power consumption of the BS is optimized by satisfying the sensor’s minimum signal-to-interference-plus-noise ratio (SINR), the phase shift constraints of the RIS, and each sensor’s power-splitting (PS) ratio. In order to decouple the optimization variables, we use the technique of block coordinate descent (BCD) to transform the total problem into subproblems. In the second subproblem, the unit modulus constraints are approximated using the successive convex approximation (SCA) method, allowing the optimal solutions to be obtained by solving subproblems in an iterative manner. Our numerical simulation results show that transmitting power consumption can be significantly decreased by adding RIS to an SPWIT system, even in nonlinear harvest models of real application scenarios.

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“…In most previous research [18][19][20][21], the energy harvested by the kth sensor has been determined by the following linear model:…”

Section: Non-linear Eh Modelmentioning

confidence: 99%

High-Efficiency Power Optimization Based on Reconfigurable Intelligent Surface for Nonlinear SWIPT System

Zheng

et al. 2022

Electronics

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“…Since then, alternative strategies have been devised both in terms of linear (i.e. beamforming) and non-linear types of precoding, see [7], [8], [9] and many references therein and [10] as a recent and interesting approach to the optimum solution in a MIMO OFDM context. The literature on spatial precoding techniques is very rich, indeed.…”

Section: Introductionmentioning

confidence: 99%

A new strategy to design and implement the optimal Multi-Antenna Broadcast Channel precoder

Pérez-Neira

Lagunas

2022

2022 26th International Conference on Circuits, Systems, Communications and Computers (CSCC)

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Even though the sum capacity of decentralized schemes, either at transmission or reception, has already been computed, in the literature, there is a lack of practical implementation schemes that achieve this sum capacity. This paper presents a novel precoder design for the multi-antenna Broadcast Channel (BC) in order to attain the BC sum capacity. It is a non-iterative BC architecture, which first implements the so-called embedded power loading. This consists in including the equivalent pointto-point (PtP) multiple-input-multiple-output (MIMO) optimal power waterfilling and eigenbeamforming. As the resulting equivalent channel is not diagonal and the decentralized receivers cannot cooperate to cancel the interference, as in the PtP MIMO case, the rest of the precoder is devoted to reproduce residual interference of the optimal dual MAC, which has been previously computed. In order not to introduce additional power, only orthogonal transformations together with a THP are used for that. A numerical example illustrates the proposed new strategy and implementation.

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Joint Beamforming and Power Allocation for Multiuser MISO Broadcast Channel SWIPT Employing OFDM

Cited by 2 publications

References 80 publications

High-Efficiency Power Optimization Based on Reconfigurable Intelligent Surface for Nonlinear SWIPT System

High-Efficiency Power Optimization Based on Reconfigurable Intelligent Surface for Nonlinear SWIPT System

A new strategy to design and implement the optimal Multi-Antenna Broadcast Channel precoder

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