Intelligent Reflecting Surface Aided MIMO Broadcasting for Simultaneous Wireless Information and Power Transfer

By Cunhua Pan, Hong Ren, Kezhi Wang, Maged Elkashlan, Arumgam Nallanathan, Jiangzhou Wang, Lajos Hanzo. IEEE Journal on Selected Areas in Communications, 2019

513 citations recorded by the source corpus.

An intelligent reflecting surface (IRS) is invoked for enhancing the energy harvesting performance of a simultaneous wireless information and power transfer (SWIPT) aided system. Specifically, an IRS-assisted SWIPT system is considered, where a multi-antenna aided base station (BS) communicates with several multi-antenna assisted information receivers (IRs), while guaranteeing the energy harvesting requirement of the energy receivers (ERs). To maximize the weighted sum rate (WSR) of IRs, the transmit precoding (TPC) matrices of the BS and passive phase shift matrix of the IRS should be jointly optimized. To tackle this challenging optimization problem, we first adopt the classic block coordinate descent (BCD) algorithm for decoupling the original optimization problem into several subproblems and alternately optimize the TPC matrices and the phase shift matrix. For each subproblem, we provide a low-complexity iterative algorithm, which is guaranteed to converge to the Karush-Kuhn-Tucker (KKT) point of each subproblem. The BCD algorithm is rigorously proved to converge to the KKT point of the original problem. We also conceive a feasibility checking method to study its feasibility. Our extensive simulation results confirm that employing IRSs in SWIPT beneficially enhances the system performance and the proposed BCD algorithm converges rapidly, which is appealing for practical applications.

Subfields: Aerospace Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/45db68dda0a0368a4d9b6ddb2af34499f9d9be9e

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Citations in the corpus

Multicell MIMO Communications Relying on Intelligent Reflecting Surfaces (2019, background): “Most recently, some initial efforts have been devoted to the transmitter design of IRS-assisted wireless communication systems, including the single-user case of [15]–[18], the downlink multiuser case of [19]–[23], wireless power transfer design of [24], mobile edge computing of [25], multicast scen”
Reconfigurable Intelligent Surfaces for 6G Systems: Principles, Applications, and Research Directions (2021, unknown): “authors of [8] proposed to deploy an RIS in the proximity of the ERs, as shown in Fig.”
Toward Smart Wireless Communications via Intelligent Reflecting Surfaces: A Contemporary Survey (2019, background): “The authors in [183] consider an IRS-assisted simultaneous wireless information and power transfer (SWIPT) system, in which a multi-antenna BS communicates with several multiantenna IRs, while guaranteeing the ERs’ energy harvesting requirements.”
Smart Radio Environments Empowered by Reconfigurable Intelligent Surfaces: How It Works, State of Research, and The Road Ahead (2020, background): “In [232], the authors study a downlink MISO wireless network with simultaneous wireless and information power transfer, in which an RIS is employed for enhancing the wireless transfer capabilities of the system.”
A Framework of Robust Transmission Design for IRS-Aided MISO Communications With Imperfect Cascaded Channels (2020, methodology): “All the above-mentioned literature [4]–[11] did not consider the transmission design by taking into account the channel estimation error.”
Intelligent Reflecting Surface: Practical Phase Shift Model and Beamforming Optimization (2019, background): “In future work, it is worth investigating such performance difference in more general IRS-aided wireless communication setups, such as multi-user systems [2], [4], OFDM-based system [17], physical layer security system [18], simultaneous wireless information and power transfer (SWIPT) systems [19], ”
Capacity Characterization for Intelligent Reflecting Surface Aided MIMO Communication (2019, methodology): “Furthermore, IRS has been jointly designed with other existing technologies, such as non-orthogonal multiple access (NOMA) [24]–[26], physical-layer security [27]–[31], and simultaneous wireless information and power transfer (SWIPT) [32], [33].”
Holographic MIMO Communications: Theoretical Foundations, Enabling Technologies, and Future Directions (2022, background): “Building up WPT and WEH capabilities, passive HMIMOS assisted SWIPT systems are particularly investigated [268], [269], in which different”
Reconfigurable Intelligent Surfaces: Principles and Opportunities (2020, unknown): “[21] studied the weighted sum rate maximization problem in the RIS-assisted SWIPT MIMO system, subject to the energy harvesting requirement of each energy receiver.”
Smart Radio Environments Empowered by Reconfigurable Intelligent Surfaces: How it Works, State of Research, and Road Ahead (2020, background): “In [231], the authors study a downlink MISO wireless”
An Overview of Signal Processing Techniques for RIS/IRS-Aided Wireless Systems (2021, unknown): “cell systems [107], [152], [153], physical layer security systems [89], [93], [94], [103], [104], [154], [155], simultaneous wireless information and power transfer (SWIPT) [105], [114], [119], [156]–[160], mobile edge computing networks [80], [117], [161]–[166], multicast networks [102], [167], cog”
Latency Minimization for Intelligent Reflecting Surface Aided Mobile Edge Computing (2019, methodology): “Apart from the conventional communications scenarios, the role of IRSs was also investigated both in terms of improving physical-layer security [30]–[33], and simultaneous wireless information and power transfer (SWIPT) [34], [35], where substantial gains were achieved.”
Joint Active and Passive Beamforming Optimization for Intelligent Reflecting Surface Assisted SWIPT Under QoS Constraints (2019, methodology): “the weighted sum-power and sum-rate optimization problems in IRS-aided SWIPT systems were recently studied in [27] and [28], respectively.”