MIMO Broadcasting for Simultaneous Wireless Information and Power Transfer

By Rui Zhang, Chin Keong Ho. IEEE Transactions on Wireless Communications, 2011

2,748 citations recorded by the source corpus.

Wireless power transfer (WPT) is a promising new solution to provide convenient and perpetual energy supplies to wireless networks. In practice, WPT is implementable by various technologies such as inductive coupling, magnetic resonate coupling, and electromagnetic (EM) radiation, for short-/mid-/long-range applications, respectively. In this paper, we consider the EM or radio signal enabled WPT in particular. Since radio signals can carry energy as well as information at the same time, a unified study on simultaneous wireless information and power transfer (SWIPT) is pursued. Specifically, this paper studies a multiple-input multiple-output (MIMO) wireless broadcast system consisting of three nodes, where one receiver harvests energy and another receiver decodes information separately from the signals sent by a common transmitter, and all the transmitter and receivers may be equipped with multiple antennas. Two scenarios are examined, in which the information receiver and energy receiver are separated and see different MIMO channels from the transmitter, or co-located and see the identical MIMO channel from the transmitter. For the case of separated receivers, we derive the optimal transmission strategy to achieve different tradeoffs for maximal information rate versus energy transfer, which are characterized by the boundary of a so-called rate-energy (R-E) region. For the case of co-located receivers, we show an outer bound for the achievable R-E region due to the potential limitation that practical energy harvesting receivers are not yet able to decode information directly. Under this constraint, we investigate two practical designs for the co-located receiver case, namely time switching and power splitting, and characterize their achievable R-E regions in comparison to the outer bound.

Subfields: Aerospace Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/5b32334e574882a62c9c209987d2cbf524917ee8

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Citations in the corpus

Wireless Charging Technologies: Fundamentals, Standards, and Network Applications (2015, background): “Being backhauled with high-speed Interne connections, SWIPT-compliant near-field chargers can be integrated into cellular systems for seamless data service during charging.”
Throughput Optimization for Massive MIMO Systems Powered by Wireless Energy Transfer (2014, background): “2391835 narrow beam to achieve efficient transmission of power, also referred to as energy beamforming [3].”
Wireless Information and Power Transfer in Cooperative Networks With Spatially Random Relays (2014, methodology): “in which wireless nodes do not have any access to external energy sources. This difﬁculty motivates the rece ntly developed concept of simultaneous wireless information and power transfer (SWIPT) [1]–[5]. The concept of SWIPT was ﬁrst proposed in [1] and [2], where it is assumed that the receiver ci”
Intelligent Reflecting Surface Enhanced Wireless Network: Joint Active and Passive Beamforming Design (2018, background): “Such a system can be employed to facilitate wireless information and/or power transfer in various Internet-of-things (IoT) applications [2], [6]–[10].”
Robust Resource Allocation for MIMO Wireless Powered Communication Networks Based on a Non-Linear EH Model (2016, background): “A similar robust resource allocation algorithm was proposed in [28], with the objective of maximizing the secrecy rate of a SWIPT system.”
Relaying Protocols for Wireless Energy Harvesting and Information Processing (2012, methodology): “Thus, energy constrained nodes can scavenge energy and process the information simultaneously [4]–[7], [10], [12].”
Cooperative Non-orthogonal Multiple Access With Simultaneous Wireless Information and Power Transfer (2015, methodology): “ Motivated by this issue, two practical receiver architectures, namely time switching (TS) receiver and power splitting (PS) receiver, were proposed in a multi-input and multi-output (MIMO) system in [7]. Since point-to-point communication systems with SWIPT are well established in the existing lite”
Enabling Wireless Power Transfer in Cellular Networks: Architecture, Modeling and Deployment (2012, background): “Recently, simultaneous wireless information-and-power transfer (SWIPT) has emerged to be a new research area, which traditionally was treated as two separate problems [11]– [14].”
Robust Beamforming for Secure Communication in Systems With Wireless Information and Power Transfer (2013, background): “Nevertheless, the availability of these natural energy sources is usually limited by location or climate and may be problematic in indoor environments.”
Fundamentals of Wireless Information and Power Transfer: From RF Energy Harvester Models to Signal and System Designs (2018, methodology): “The transmitter optimizes the transmitted signals jointly for information and energy transfer and the PS receiver splits the received signal into two streams, where one stream with PS ratio 0 ≤ ρ ≤ 1 is used for EH, and the other with power ratio 1 − ρ is used for ID [24], [27], [28].”
Computation Rate Maximization for Wireless Powered Mobile-Edge Computing With Binary Computation Offloading (2017, background): “where P denotes the RF energy transmit power of the AP and μ ∈ (0, 1) denotes the energy harvesting efficiency [6].”
A Survey on Non-Orthogonal Multiple Access for 5G Networks: Research Challenges and Future Trends (2017, background): “information and power transfer (SWIPT), a new member of the energy harvesting family [104]–[106], to NOMA can be”
Simultaneous Wireless Information and Power Transfer (SWIPT): Recent Advances and Future Challenges (2018, methodology): “Overall simulation results and the conclusion are very different from the previously reported results [58] in the absence of the ideal receiver, which always performs better.”
Wireless Information and Power Transfer With Full Duplex Relaying (2014, neutral): “Later in [5], practical architectures, i.”
Spatial Modulation for Generalized MIMO: Challenges, Opportunities, and Implementation (2014, background): “…may be realized using new hybrid cellular deployments, where some stations often referred to as power beacons are overlaid onto the existing cellular network with the objective of charging wireless devices with the aid of microwave radiation links relying on microwave power transfer [298], [299].”
Optimal Resource Allocation in Full-Duplex Wireless-Powered Communication Network (2014, background): “, the point-to-point additive white Gaussian noise (AWGN) channel [3], [4], the fading AWGN channel [5], [6] the multi-antenna channel [7]–[9], the relay channel [10], [11], and the multi-carrier based broadcast channel [12]–[14].”
Energy Efficient Mobile Cloud Computing Powered by Wireless Energy Transfer (2015, methodology): “Assuming channel reciprocity [20], [21], the effective scalar channel power gain is represented as h.”
Joint offloading and computing optimization in wireless powered mobile-edge computing systems (2017, methodology): “he WPT efﬁciencyfrom the energytransmitter to one or more energy receivers, transmit energy beamforming has been proposed as a promising solution by deploying multiple antennas at energy transmitters [9]. By properly adjusting the transmit beamforming vectors, energy transmitters can concentrate the”