DocumentCode :
27553
Title :
Maximizing the Capacity of Magnetic Induction Communication for Embedded Sensor Networks in Strongly and Loosely Coupled Regions
Author :
Kisong Lee ; Cho, Dong-ho
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol. (KAIST), Daejeon, South Korea
Volume :
49
Issue :
9
fYear :
2013
fDate :
Sept. 2013
Firstpage :
5055
Lastpage :
5062
Abstract :
We attempt to maximize the capacity of magnetic induction communication in strongly and loosely coupled regions. In a strongly coupled region, we investigate frequency splitting, which disturbs the resonance of transmitter and receiver coils. We find a splitting coupling point, which is the value just before frequency splitting occurs, and propose an adaptive frequency-tracking scheme for finding an optimal frequency. The proposed scheme compensates for the degradation of capacity and so guarantees large capacity even at regions where frequency splitting occurs. Next, in a loosely coupled region, we derive an optimal quality factor for maximizing capacity in a two-coil system. As the distance between coils increases, strong resonance is needed to overcome the serious attenuation of signal strength. As a result, the optimal quality factor should be increased. In addition, we find an optimal quality factor for a relay system in order to guarantee reliable communication at long distance. In addition, an optimal- Q scheme that adjusts the optimal quality factor according to a given distance can achieve near-optimal capacity. Finally, through simulations using the Agilent Advanced Design System, we demonstrate the accuracy of our analytic results and the effectiveness of the proposed schemes.
Keywords :
Q-factor; electromagnetic induction; intelligent sensors; relay networks (telecommunication); underground communication; wireless sensor networks; Agilent advanced design system; adaptive frequency-tracking scheme; capacity maximization; embedded sensor networks; frequency splitting; loosely coupled regions; magnetic induction communication; optimal quality factor; optimal-Q scheme; receiver coils; relay system; signal strength attenuation; splitting coupling point; transmitter coils; two-coil system; wireless underground sensor networks; Embedded sensor networks; frequency splitting; magnetic induction communication; quality factor;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2013.2258933
Filename :
6504763
Link To Document :
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