Cited time in webofscience Cited time in scopus

Magnetic MIMO System using Signal Processing for Robustness to Misalignment

Magnetic MIMO System using Signal Processing for Robustness to Misalignment
Alternative Title
신호처리기법을 이용하여 오배열에 강인한 자기장 다중입출력 통신시스템
Hwang, Suk Hyun
DGIST Authors
Hwang, Suk HyunChoi, Ji WoongChoi, Hong Soo
Choi, Ji Woong
Choi, Hong Soo
Issued Date
Awarded Date
2017. 2
Magnetic communicationMIMOMisalignmentSignal processing자기장 통신다중입력 다중출력오배열신호처리
Nowadays, requirements of communication in special channel environments are increasing such as underwater, underground, and biological tissues which have a high permittivity characteristic. The conventional radio frequency (RF) communication, which is based on the principle of electromagnetic radiation, is not suitable in these channel environments due to a high path loss problem. Magnetic communication systems are not affected by the permittivity of channel environments. Therefore, the magnetic communication systems have attracted attention as an alternative communication in these channels. However, the magnetic communication has limitations such as a low data-rate, a short communication range and a sensitive in misalignment between transmit antennas and receiver antennas. Many research teams have tried to overcome these problems by various approaches. In this paper, we realize the magnetic MIMO communication test bed using the heterogeneous multi-pole loop antenna array to obtain the higher data rate and the enhancement of bit error rate (BER) performance in misalignment cases using various signal processing schemes. The proposed antenna array can satisfy a same BER performance of the conventional antenna array at the further distance. Furthermore, to obtain the enhanced BER performance in various misalignment cases, we apply signal processing schemes, which are used in the conventional RF communication, to the proposed test bed, such as maximum likelihood (ML), zero forcing (ZF), minimum mean square error (MMSE) and singular value decomposition (SVD). We verify to overcome the misalignment problems that magnetic communication can overcome the misalignment problem using the signal processing schemes. The SVD shows the lowest BER performance in large misalignment with a perfect channel information, and ML shows the best BER performance without the channel information. Other signal processing schemes present a same BER performance due to a high SNR channel condition. ⓒ 2017 DGIST
Table Of Contents
Ⅰ. Introduction 1 --
Ⅱ. Near field magnetic communication 3 --
2.1 Magnetic communication and applications 3 --
2.2 Limitation and related research 4 --
2.2.1 To expend the communication distance 4 --
2.2.2 To robust to misalignment 5 --
2.2.3 To robust to misalignment 5 --
Ⅲ. Magnetic MIMO communication System 7 --
3.1 Concept of magnetic MIMO 7 --
3.2 Misalignment in MIMO antenna array 8 --
Ⅳ. Misalignment insensitive communication system test bed 12 --
4.1 Hardware configuration 12 --
4.2 Software configuration 14 --
4.3 MIMO signal processing schemes 17 --
4.3.1 Singular value decomposition (SVD) based estimator 18 --
4.3.2 Maximum likelihood (ML) detector 19 --
4.3.3 Zero forcing (ZF) receiver 20 --
4.3.4 Minimum mean square error (MMSE) receiver 21 --
Ⅴ. Misalignment experimental results 22 --
5.1 Experiment setup 23 --
5.2 BER performance results 24 --
Ⅵ. Conclusion 29
Information and Communication Engineering
Related Researcher
  • 최지웅 Choi, Ji-Woong 전기전자컴퓨터공학과
  • Research Interests Communication System; Signal Processing; Communication Circuit Design; 생체 신호 통신 및 신호 처리; 뇌-기계 인터페이스(BMI); 차세대 교차계층 통신 및 신호 처리; 5G 모바일 통신
Files in This Item:


기타 데이터 / 1.6 MB / Adobe PDF download
Appears in Collections:
Department of Electrical Engineering and Computer Science Theses Master


  • twitter
  • facebook
  • mendeley

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.