2017
DOI: 10.1109/tsp.2017.2673816
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Magnetic MIMO Signal Processing and Optimization for Wireless Power Transfer

Abstract: Abstract-In magnetic resonant coupling (MRC) enabled multiple-input multiple-output (MIMO) wireless power transfer (WPT) systems, multiple transmitters (TXs) each with one single coil are used to enhance the efficiency of simultaneous power transfer to multiple single-coil receivers (RXs) by constructively combining their induced magnetic fields at the RXs, a technique termed "magnetic beamforming". In this paper, we study the optimal magnetic beamforming design in a multi-user MIMO MRC-WPT system. We introduc… Show more

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Cited by 82 publications
(24 citation statements)
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“…In addition, the receiver adopts the power distribution method [8], and its working method is to divide the received signal into two parts through the energy distributor. The power of part ρ is used for energy harvesting, and the power of part (1 − ρ) is used for information decoding, where ρ is the power allocation factor, and 0 ≤ ρ ≤ 1.…”
Section: System Modelmentioning
confidence: 99%
“…In addition, the receiver adopts the power distribution method [8], and its working method is to divide the received signal into two parts through the energy distributor. The power of part ρ is used for energy harvesting, and the power of part (1 − ρ) is used for information decoding, where ρ is the power allocation factor, and 0 ≤ ρ ≤ 1.…”
Section: System Modelmentioning
confidence: 99%
“…Note that, since h r can be a complex number, M is also a complex number with real part M r and imaginary part M i . M is usually a real number [30] because the distance between the transmitter and the receiver is much shorter than the wavelength and the phase shift due to propagation can be neglected. As the communication range extends to the radiative near field and the far field, the phase shift caused by propagation has to be taken into account in the mutual inductance.…”
Section: Mutual Inductancementioning
confidence: 99%
“…Hence, minimizing the path loss may not result in meaningful results without a practical transmission voltage constraint. In this paper, we use the maximum voltage and maximize the received power in (30). In this case, the optimal load resistance is…”
Section: B Path Loss Modelmentioning
confidence: 99%
“…Another research line of magnetic induction MIMO is wireless power transfer. In [6]- [8], the optimal beamforming strategies using magnetic induction MIMO are derived to efficiently charge wireless devices. The considered coil array is planar, which is more suitable for indoor applications rather than tiny robots due to the limited size.…”
Section: Introductionmentioning
confidence: 99%