Simultaneous Information and Power Transfer for Broadband Wireless Systems

By Kaibin Huang, Erik G. Larsson. IEEE Transactions on Signal Processing, 2012

447 citations recorded by the source corpus.

Far-field microwave power transfer (MPT) will free wireless sensors and other mobile devices from the constraints imposed by finite battery capacities. Integrating MPT with wireless communications to support simultaneous wireless information and power transfer (SWIPT) allows the same spectrum to be used for dual purposes without compromising the quality of service. A novel approach is presented in this paper for realizing SWIPT in a broadband system where orthogonal frequency division multiplexing and transmit beamforming are deployed to create a set of parallel sub-channels for SWIPT, which simplifies resource allocation. Based on a proposed reconfigurable mobile architecture, different system configurations are considered by combining single-user/multi-user systems, downlink/uplink information transfer, and variable/fixed coding rates. Optimizing the power control for these configurations results in a new class of multi-user power-control problems featuring the circuit-power constraints, specifying that the transferred power must be sufficiently large to support the operation of the receiver circuitry. Solving these problems gives a set of power-control algorithms that exploit channel diversity in frequency for simultaneously enhancing the throughput and the MPT efficiency. For the system configurations with variable coding rates, the algorithms are variants of water-filling that account for the circuit-power constraints. The optimal algorithms for those configurations with fixed coding rates are shown to sequentially allocate mobiles their required power for decoding in ascending order until the entire budgeted power is spent. The required power for a mobile is derived as simple functions of the minimum signal-to-noise ratio for correct decoding, the circuit power and sub-channel gains.

Subfields: Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/6924f7547e0d28fcfbcfc85104109c8dbfaac57f

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Citations in the corpus

Communications and Signals Design for Wireless Power Transmission (2016, background): “, need to be carefully optimized to achieve the optimal trade-off between information and power transmissions [154], [189]–[193].”
Fundamentals of Wireless Information and Power Transfer: From RF Energy Harvester Models to Signal and System Designs (2018, background): “Since then, SWIPT has attracted signiﬁcant interests in the communication literature with works covering a wide range of topics, among others MIMO broad-casting [25], [26], architecture [27], [28], interference channel [29]–[31], broadband system [32]–[34], relaying [35], [36].”
Wireless powered communication: opportunities and challenges (2014, background): “In general, the optimal value τ 0 that results in the highest UL throughput is related to the users’ wireless channel conditions.”
Joint Transmit Beamforming and Receive Power Splitting for MISO SWIPT Systems (2013, background): “Furthermore, SWIPT has been investigated in other channel setups such as relay channels [13]–[16] and OFDM channels [17], [18].”
A Survey of Energy-Efficient Techniques for 5G Networks and Challenges Ahead (2016, background): “This approach can be taken even further, superimposing the energy signals on regular communication signals, resulting in the so-called simultaneous wireless information and power transfer (SWIPT) [137]–[139].”
Simultaneous Wireless Information and Power Transfer (SWIPT): Recent Advances and Future Challenges (2018, methodology): “Integration of SWIPT with Microwave Power Transfer (MPT) within a broadband wireless system is a promising technique for the need of convenient energy supply in wireless networks [64].”
Wireless Networks With RF Energy Harvesting: A Contemporary Survey (2014, methodology): “Indeed, beamforming has been deemed as the primary technique for feasible implementation of SWIPT [ 13], [137], [169].”
Wireless Information and Power Transfer in Multiuser OFDM Systems (2013, methodology): “Moreover, [15] focuses on power control by assuming a predefined subcarrier allocation.”
Wireless Information and Power Transfer in Cooperative Networks With Spatially Random Relays (2014, methodology): “The use of SWIPT in OFDM networks has also received a lot of attention due to the success of WiMAX and 3GPP-Long Term Evolution (LTE) [7].”