Design of filamentary planar spiral coils with enhanced channel model for magnetic induction based underground communication

2021 ◽  
Author(s):  
Swathi Sugumar ◽  
Sakthivel Murugan Santhanam
Keyword(s):  
Magnetic Induction ◽  
Channel Model ◽  
Underground Communication ◽  
Spiral Coils

scholarly journals A Computational Channel Model for Magnetic Induction‐Based Subsurface Applications

Radio Science ◽  
2019 ◽  
Vol 54 (9) ◽  
pp. 822-838 ◽  
Author(s):  
Natalia Ayuso ◽  
José Antonio Cuchí ◽  
Francisco Lera ◽  
José Luis Villarroel
Keyword(s):  
Magnetic Induction ◽  
Channel Model

scholarly journals Capacity of Magnetic-Induction MIMO Communication for Wireless Underground Sensor Networks

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Song Li ◽  
Yanjing Sun ◽  
Wenjuan Shi
Keyword(s):  
Sensor Networks ◽  
Channel Capacity ◽  
Magnetic Induction ◽  
Channel Model ◽  
Multiple Input Multiple Output ◽  
Promising Alternative ◽  
Mimo Communication ◽  
Single Output ◽  
Multiple Input ◽  
Input Multiple Output

In underground sensor networks, electronic magnetic waves undergo severe fading due to the challenging environment. Magnetic-induction (MI) communication is a promising alternative physical layer technique for underground sensor networks. In this paper, we solve the intercoil crosstalk in magnetic-induction multiple-input multiple-output (MI MIMO) communication and investigate the channel capacity for underground MI MIMO wireless communication. Firstly, considering mutual induction between each two coils, we analyze the capacity of magnetic-induction channel. Secondly, the channel model of magnetic-induction multiple-input single-output (MISO) is introduced and a novel coil deployment method is proposed to reduce the crosstalk in MI MISO communication. Finally, the capacity of MI MISO communication and MI MIMO communication is deduced by the proposed coil deployment method. Simulation shows that the channel capacity would increase significantly in high SNR regime for underground MI MIMO communication.

Analysis of magneto rheological elastomers for energy harvesting systems

2020 ◽  
Vol 64 (1-4) ◽  
pp. 439-446
Author(s):  
Gildas Diguet ◽  
Gael Sebald ◽  
Masami Nakano ◽  
Mickaël Lallart ◽  
Jean-Yves Cavaillé
Keyword(s):  
Magnetic Field ◽  
Energy Harvesting ◽  
Shear Strain ◽  
Magnetic Induction ◽  
Magnetic Particles ◽  
Homogeneous Magnetic Field ◽  
Electrical Signal ◽  
Harvesting Systems ◽  
Dc Bias ◽  
Magneto Rheological

Magneto Rheological Elastomers (MREs) are composite materials based on an elastomer filled by magnetic particles. Anisotropic MRE can be easily manufactured by curing the material under homogeneous magnetic field which creates column of particles. The magnetic and elastic properties are actually coupled making these MREs suitable for energy conversion. From these remarkable properties, an energy harvesting device is considered through the application of a DC bias magnetic induction on two MREs as a metal piece is applying an AC shear strain on them. Such strain therefore changes the permeabilities of the elastomers, hence generating an AC magnetic induction which can be converted into AC electrical signal with the help of a coil. The device is simulated with a Finite Element Method software to examine the effect of the MRE parameters, the DC bias magnetic induction and applied shear strain (amplitude and frequency) on the resulting electrical signal.

Research on expanding the range of reproduction of magnetic flux density of the DC field of the state primary standard GET12-2011

2020 ◽  
pp. 3-7
Author(s):  
Vladlen Ya. Shifrin ◽  
Denis I. Belyakov ◽  
Alexander E. Shilov ◽  
Denis D. Kosenko
Keyword(s):  
Magnetic Flux ◽  
Magnetic Induction ◽  
Frequency Conversion ◽  
Magnetic Measurements ◽  
Primary Standard ◽  
Uncertainty Budget ◽  
The State ◽  
State Primary Standard ◽  
Magnetic Flux Density ◽  
Constant Field

The results of works aimed at increasing the level of uniformity of measurements of the magnetic induction of a constant field – the basic value in the field of magnetic measurements. A set of equipment for reproducing a unit of magnetic induction of a constant field in the range of 1–25 mT was created and described. The inclusion of this complex in the State primary standard of units of magnetic induction, magnetic flux, magnetic moment and magnetic induction gradient GET 12-2011 will ensure the reproduction and direct transmission of the unit of permanent magnetic induction in the ranges of not only weak (10–3–1 mT), but medium (1–25 mT) and strong (0.025–1 T) magnetic fields. A quantum cesium magnetometer based on the resolved structure of cesium atoms was created to transmit the unit of magnetic induction to the region of medium fields. The procedure for calculating the frequency conversion coefficients to magnetic induction of the created quantum cesium magnetometer is described. The uncertainty budget for reproducing a unit of magnetic induction of a constant field using the created complex is estimated.

A Markov-Based Satellite-to-Ground Optical Channel Model and Its Effective Coding Scheme

2012 ◽  
Vol E95-B (1) ◽  
pp. 254-262
Author(s):  
Yoshitoshi YAMASHITA ◽  
Eiji OKAMOTO ◽  
Yasunori IWANAMI ◽  
Yozo SHOJI ◽  
Morio TOYOSHIMA ◽  
...  
Keyword(s):  
Channel Model ◽  
Optical Channel ◽  
Coding Scheme

MU-MIMO Channel Model with User Parameters and Correlation between Channel Matrix Elements in Small Area of Multipath Environment

2020 ◽  
Vol E103.B (12) ◽  
pp. 1421-1431
Author(s):  
Shigeru KOZONO ◽  
Yuya TASHIRO ◽  
Yuuki KANEMIYO ◽  
Hiroaki NAKABAYASHI
Keyword(s):  
Small Area ◽  
Channel Model ◽  
Mimo Channel ◽  
Matrix Elements ◽  
Channel Matrix ◽  
Multipath Environment
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