Hybrid Wireless Positioning and Charging With Switched Field Helmholtz Coils for Wireless Capsule Endoscopy

Shao, Guoliang; Guo, Yong‐Xin

doi:10.1109/tmtt.2019.2959762

Cited by 17 publications

(10 citation statements)

References 21 publications

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“…5 shows the average BER of all C-Users with the growing of BER target . From the ''*'' curve, it can be found that the BER of C-Users based on the JIPAA algorithm is equal to the target BER when B = 18, 25, 32MHz, which is consistent with the theoretical analysis of OP1 in (11). However, according to the other three curves, the BER of C-Users in traditional method is larger than the BER target when B = 18, 25, 32MHz.…”

Section: Numerical Resultssupporting

confidence: 74%

“…The objective function tends to reduce P c,n , and the first constraint should take the equal sign. Therefore, with the proper ranging error σ 2 th , the solution of OP1 is shown as (11). Otherwise, OP1 has no feasible solution.…”

Section: Power Allocation Algorithmmentioning

confidence: 99%

“…placements of the nodes [7]- [9]. And it is costly to collect and maintain the fingerprint database as well [10], [11].…”

Section: Introductionmentioning

confidence: 99%

“…For each C-Users n, calculate P c,n,k using (11) and P p,m,k−1 , m ∈ M . 10: As for both OP1 and OP2 need to reduce P c,n , the joint problem composed of OP1 and OP2 is convergent.…”

mentioning

confidence: 99%

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Joint Uplink Power Allocation Method in Wireless Communication and Positioning Integrated System

et al. 2021

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With the development of wireless communication, there are usually both communication and positioning requirements. In our previous work, we studied the power allocation algorithm for positioning user (P-User) based on Multi-Scale Non-Orthogonal Multiple Access (MS-NOMA) downlink signal where all communication users (C-Users) have the same power. In the uplink case, the power allocation scheme for both C-User and P-User needs to be considered jointly as all C-Users may have different power. In this paper, we analyze the Quality of Service (QoS) and ranging accuracy based on the MS-NOMA signal by deriving their simple expressions. Then, a two stage joint iterative power allocation algorithm (JIPAA) is proposed. In the first stage, considering the QoS of C-User requirement and total power limitation, the power of P-Users is allocated to obtain optimal ranging performance. In the second stage, the power of C-Users is allocated to minimize the power consumption. With the iterative process, the optimal power of each C-User and P-User is calculated. The numerical results show that the proposed JIPAA algorithm dramatically promotes ranging accuracy under the same energy consumption.INDEX TERMS Multi-scale non-orthogonal multiple access (MS-NOMA), power allocation, quality of service (QoS), ranging accuracy.

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Section: Numerical Resultssupporting

confidence: 74%

Section: Power Allocation Algorithmmentioning

confidence: 99%

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Joint Uplink Power Allocation Method in Wireless Communication and Positioning Integrated System

et al. 2021

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“…(9), and ii) evaluate the Cartesian components of the field following Eqs. (11) and (12). In order to compute the magnetic field produced by a current carrying system at any point in space, it is enough to define its geometry as a superposition of n finite wires and then iterate the routine that evaluates the magnetic field over each wire.…”

Section: Numerical Analysismentioning

confidence: 99%

Exploring the magnetic field of Helmholtz and Maxwell coils: a computer-based approach exploiting the superposition principle

García-Farieta

Márquez

2020

Rev. Bras. Ensino Fís.

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Teaching magnetism is one of the most challenging topics at undergraduate level in programmes with scientific background. A basic course includes the description of the magnetic interaction along with empirical results such as the Biot-Savart law's. However, evaluating the magnetic field due to certain current carrying system at any point in space is not an easy task, especially for points in space where symmetry arguments cannot be applied. In this paper we study the magnetic field produced by both Helmholtz and Maxwell coils at all points in space by using a hybrid methodology that combines the superposition principle and an analytical result. We implement a computational approach, that is based on iterating n times the magnetic field produced by a finite current-carrying wire, to evaluate the magnetic field at any point in space for coils arrangements without using advanced calculus. This methodology helps teachers and students to explore the field due to systems with different levels of complexity, combining analytical and computational skills to visualize and analyse the magnetic field. After our analysis, we show that this is an useful approach to emphasize fundamental concepts and mitigate some of the issues that arise when evaluating the magnetic field for systems proposed in introductory physics textbooks.

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Optimized coil turns of receiving ferrite core antenna for wireless magnetic inductive communication

Feng

Liu

2022

Int J RF Mic Comp-Aid Eng

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Turns of coil antenna with ferrite core is the most critical parameter when designing receiving coil antennas for wireless magnetic inductive communication. According to the adjustment of turns, the self-inductance, self-resistance, and mutual inductance of the coil will change respectively. Parallel resonance is often used in receiving coils to obtain a considerable induced voltage which supplies for receiving system. In this article, we summarize the parameters of the ferrite coil antenna with its corresponding circuit model and parallel resonance circuit. Moreover, the optimized turns of receiving coil antenna with ferrite core are analyzed. Meanwhile, an experiment has been built to verify the proposed conclusion with calculations. The results show that measurement results are well-matched with calculated ones. Turns of the coil can be optimized to get larger induced voltage and the conclusion will guide for designing coils for wireless magnetic inductive communication.

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Hybrid Wireless Positioning and Charging With Switched Field Helmholtz Coils for Wireless Capsule Endoscopy

Cited by 17 publications

References 21 publications

Joint Uplink Power Allocation Method in Wireless Communication and Positioning Integrated System

Joint Uplink Power Allocation Method in Wireless Communication and Positioning Integrated System

Exploring the magnetic field of Helmholtz and Maxwell coils: a computer-based approach exploiting the superposition principle

Optimized coil turns of receiving ferrite core antenna for wireless magnetic inductive communication

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