5,404 research outputs found
Non-Invasive Induction Link Model for Implantable Biomedical Microsystems: Pacemaker to Monitor Arrhythmic Patients in Body Area Networks
In this paper, a non-invasive inductive link model for an Implantable
Biomedical Microsystems (IBMs) such as, a pacemaker to monitor Arrhythmic
Patients (APs) in Body Area Networks (BANs) is proposed. The model acts as a
driving source to keep the batteries charged, inside a device called,
pacemaker. The device monitors any drift from natural human heart beats, a
condition of arrythmia and also in turn, produces electrical pulses that create
forced rhythms that, matches with the original normal heart rhythms. It
constantly sends a medical report to the health center to keep the medical
personnel aware of the patient's conditions and let them handle any critical
condition, before it actually happens. Two equivalent models are compared by
carrying the simulations, based on the parameters of voltage gain and link
efficiency. Results depict that the series tuned primary and parallel tuned
secondary circuit achieves the best results for both the parameters, keeping in
view the constraint of coupling co-efficient (k), which should be less than a
value \emph{0.45} as, desirable for the safety of body tissues.Comment: IEEE 8th International Conference on Broadband and Wireless
Computing, Communication and Applications (BWCCA'13), Compiegne, Franc
Beamforming for Magnetic Induction based Wireless Power Transfer Systems with Multiple Receivers
Magnetic induction (MI) based communication and power transfer systems have
gained an increased attention in the recent years. Typical applications for
these systems lie in the area of wireless charging, near-field communication,
and wireless sensor networks. For an optimal system performance, the power
efficiency needs to be maximized. Typically, this optimization refers to the
impedance matching and tracking of the split-frequencies. However, an important
role of magnitude and phase of the input signal has been mostly overlooked.
Especially for the wireless power transfer systems with multiple transmitter
coils, the optimization of the transmit signals can dramatically improve the
power efficiency. In this work, we propose an iterative algorithm for the
optimization of the transmit signals for a transmitter with three orthogonal
coils and multiple single coil receivers. The proposed scheme significantly
outperforms the traditional baseline algorithms in terms of power efficiency.Comment: This paper has been accepted for presentation at IEEE GLOBECOM 2015.
It has 7 pages and 5 figure
Omnidirectional WPT and data communication for electric air vehicles: feasibility study
This paper investigates the feasibility of using the three dimensional omnidirectional inductive channel for power transfer and as a power line communication PLC for ground-based vehicle, electric air vehicle or space applications, the simulation results is performed by the advanced design system software using lumped equivalent circuit model. The power transfer efficiency determined based on multiport scattering (S)-parameters numerical simulation results while the theoretical channel capacity is calculated based on Matlab software as a function of the coupling coefficient considering an additive white Gaussian noise . Furthermore, the magnetic field distribution is evaluated as function of the misalignment angle θ between the receiver and the three orthogonal transmitters coils
Recent Advances in Joint Wireless Energy and Information Transfer
In this paper, we provide an overview of the recent advances in
microwave-enabled wireless energy transfer (WET) technologies and their
applications in wireless communications. Specifically, we divide our
discussions into three parts. First, we introduce the state-of-the-art WET
technologies and the signal processing techniques to maximize the energy
transfer efficiency. Then, we discuss an interesting paradigm named
simultaneous wireless information and power transfer (SWIPT), where energy and
information are jointly transmitted using the same radio waveform. At last, we
review the recent progress in wireless powered communication networks (WPCN),
where wireless devices communicate using the power harvested by means of WET.
Extensions and future directions are also discussed in each of these areas.Comment: Conference submission accepted by ITW 201
Wireless power and data transfer via a common inductive link using frequency division multiplexing
For wireless power transfer (WPT) systems, communication between the primary side and the pickup side is a challenge because of the large air gap and magnetic interferences. A novel method, which integrates bidirectional data communication into a high-power WPT system, is proposed in this paper. The power and data transfer share the same inductive link between coreless coils. Power/data frequency division multiplexing technique is applied, and the power and data are transmitted by employing different frequency carriers and controlled independently. The circuit model of the multiband system is provided to analyze the transmission gain of the communication channel, as well as the power delivery performance. The crosstalk interference between two carriers is discussed. In addition, the signal-to-noise ratios of the channels are also estimated, which gives a guideline for the design of mod/demod circuits. Finally, a 500-W WPT prototype has been built to demonstrate the effectiveness of the proposed WPT system
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