Performance Analysis of Near-Field Magnetic Induction Communication in Extreme Environments

Guo, Hongzhi

doi:10.2528/pierl20010702

Cited by 12 publications

(11 citation statements)

References 9 publications

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“…A fundamental advantage of magnetic near-field communication is the insensitivity to reflection/scattering/diffraction caused by the seafloor and other obstacles. However, it is important to note that this characteristic is only valid in the non-radiative near field [13]. The terms "near field" and "far field" mentioned before describe different spatial areas in antenna technology that surround the radiator.…”

Section: Theoretical Analysis a Near-field Communicationmentioning

confidence: 99%

Underwater Communication Employing High-Sensitive Magnetic Field Detectors

Hott

Hoeher

2020

IEEE Access

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Magnetic communication is receiving significant interest in RF-challenging environments. Particularly in underwater environments and underground wireless sensor networks, magnetic communication is an emerging research area. In this paper, a new approach for magnetic underwater communication is presented and evaluated. In this approach, the receiver coil of a conventional magnetic induction communication system is replaced by a high-sensitive low-noise wideband magnetic field sensor. This concept enables a good detection sensitivity and, under certain conditions, an extended communication range. Most magnetic field sensors are small compared to equivalent search coils and offer a high bandwidth. Hence, they can be assembled in order to provide multiple-input multiple-output processing. Based on suitable channel modeling, trade-offs between system parameters are analyzed and the channel capacity is derived. Analytical results are supported by a prototype implementation. Potential application scenarios are studied, where emphasis is on mobile applications.

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Section: Theoretical Analysis a Near-field Communicationmentioning

confidence: 99%

Underwater Communication Employing High-Sensitive Magnetic Field Detectors

Hott

Hoeher

2020

IEEE Access

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“…We use magnetic induction because its operating frequency is in the HF band which demonstrates a long skin depth. In this case, if the communication range is much shorter than the wavelength, the impact of the soil-air boundary can be neglected [7] and, thus, we can consider the environment as a homogeneous medium. The mobile charger employs a tri-axis coil with three mutually perpendicular unidirectional coils.…”

Section: Triaxis Coil Transmittermentioning

confidence: 99%

MagBB: Wireless Charging for Batteryless Sensors using Magnetic Blind Beamforming

Ofori

Guo

2020

Preprint

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Tiny batteryless sensors are desirable since they create negligible impacts on the operation of the system being monitored or the surrounding environment. Wireless energy transfer for batteryless sensors is challenging since they cannot cooperate with the charger due to the lack of energy. In this paper, a Magnetic Blind Beamforming (MagBB) algorithm is developed for wireless energy transfer for batteryless sensors in inhomogeneous media. Batteryless sensors with randomly orientated coils may experience significant orientation losses and they may not receive any energy from the charger. MagBB uses a set of optimized current vectors to generate rotating magnetic fields which can ensure that coils on batteryless sensors with arbitrary orientations can receive sufficient voltages for charging. It does not require any information regarding the batteryless sensor's coil orientation or location. The efficiency of MagBB is proven by extensive numerical simulations.

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“…However, the use of metamaterials increases the coil size which is challenging to be employed to design extremely tiny sensors. Although electromagnetic wave-based communications also work when the depth in the soil is shallow, the penetration loss is high and the antenna size is large since it has to be comparable to the wavelength [19], [20]. Note that, the use of MIC for inhomogeneous media is a general problem and we can employ the same approach by replacing the soil with the water, concrete wall, road, and the human body, for many other important applications.…”

Section: Introductionmentioning

confidence: 99%

Joint Channel and Antenna Modeling for Magnetic Induction Communication in Inhomogeneous Media

Guo¹,

Ofori²

2020

IEEE Open J. Commun. Soc.

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Magnetic induction communication (MIC) demonstrates high penetration efficiency and low propagation loss in extreme environments. It is used in underground and underwater environments to enable critical applications that cannot be achieved by using terrestrial wireless techniques. This paper studies the channel and antenna modeling for MIC in inhomogeneous environments, where a transmitter and a receiver are in two different media. This problem finds a large number of practical applications such as communicating with wireless sensors in the soil, water, walls, and the human body using a wireless device in the air. This paper develops a joint channel and antenna model considering the inhomogeneity of the surrounding environments. An exact full-wave model and a near field approximation model are developed and evaluated to show the characteristics of this novel wireless technique as well as the limitations of existing solutions. Using the communication with underground sensors as an example, the results show that the path loss of MIC strongly depends on the propagation media which is drastically different from electromagnetic wavebased wireless communications in terrestrial environments. Also, we find that the MIC channel in inhomogeneous media exhibits non-reciprocity due to different transmission coefficients through the boundary. Moreover, the boundary can be neglected when the carrier frequency is sufficiently low. The developed model provides a tool to design wireless sensor networks in inhomogeneous extreme environments.

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Performance Analysis of Near-Field Magnetic Induction Communication in Extreme Environments

Cited by 12 publications

References 9 publications

Underwater Communication Employing High-Sensitive Magnetic Field Detectors

Underwater Communication Employing High-Sensitive Magnetic Field Detectors

MagBB: Wireless Charging for Batteryless Sensors using Magnetic Blind Beamforming

Joint Channel and Antenna Modeling for Magnetic Induction Communication in Inhomogeneous Media

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