한국인터넷방송통신학회논문지 (The Journal of the Institute of Internet, Broadcasting and Communication)

  • 제18권3호
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  • Pages.215-221
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  • 2018
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  • 2289-0238(pISSN)
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  • 2289-0246(eISSN)
한국인터넷방송통신학회 (The Institute of Internet, Broadcasting and Communication)
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캡슐내시경을 위한 HBC시스템 구현

An Implementation of HBC System for Capsule Endoscope

  • Kim, Ki-Yun (Dept. of Electrical Engineering, Myongji College)
  • 투고 : 2018.04.08
  • 심사 : 2018.06.08
  • 발행 : 2018.06.30
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초록

본 논문에서는 캡슐 내시경을 위한 HBC(Human Body Communication) 시스템의 종합적인 설계 방법을 제시하였다. 먼저 환자 몸에 부착된 다수의 패치로부터 수신되는 신호를 차동 연산을 통해 합성하는 방법을 제시하고 이를 통한 신호 SNR을 수학적으로 유도하였다. 캡슐에서 보내는 HBC 송신신호를 동기화하기 위한 방법으로 PN 코드를 이용한 대략적 타이밍 동기 방법과 ZCD(Zero Crossing Detector)를 통한 Manchester, NRZ, RZ 변조 기법간의 미세 타이밍 동기 성능을 분석하였다. 아울러 HBC 신호 프레임을 Rician 및 Rayleigh 채널 환경에서 적용하였을 때의 등화 성능을 LMS 및 RLS 알고리즘을 적용하여 평가하였다.

In this paper, a comprehensive design of HBC(Human Body Communication) system for capsule endoscope is presented. First, we propose a method of combining the signals received from multiple patches attached to the body of patient through differential operation and derive the signal SNR mathematically. To synchronize HBC transmission signal sent from capsule, we analyzed coarse timing synchronization method using PN code and fine timing synchronization performance among Manchester, NRZ and RZ modulation method using ZCD(Zero Crossing Detector). In addition, we evaluated the equalization performance of HBC signal frame in Rician and Rayleigh channel environments by applying LMS and RLS algorithm.

키워드

참고문헌

  1. Ki-Yun Kim, Kyung-Hoon Won, and Hyung-Jin Choi, "Technical Characteristics and Trends of Capsule Endoscope," The Journal of The Korean Institute of Communications and Information Sciences, Vol. 37, No. 4, pp. 329-337, Apr. 2012. https://doi.org/10.7840/KICS.2012.37C.4.329
  2. Umma Hany and Lutfa Akter, "Non-Parametric Approach of Video Capsule Endoscope Localization Using Suboptimal Method of Position Bounded CWCL," IEEE Sensors Journal, Vol. 17, Issue 20, pp. 6806-6815, Aug. 2017. DOI : 10.1109/JSEN.2017.2743217.
  3. Joon-Young Son, Kyung-Hoon Won, Won-Jun Hwang, Hyung-Jin Choi, Ki-Yun Kim, and Sung-IL Seo, "Maximal Ratio Combining for Capsule Endoscope," Proc. of Symposium of the Korean Institute of Communications and Information Sciences, pp. 413-414, Jun. 2013.
  4. Won-Jun Hwang, Ki-Yun Kim, and Hyung-Jin Choi, "Enhanced Common-Mode Noise Rejection Method Based on Impedance Mismatching Compensation for Wireless Capsule Endoscope System," ETRI Journal, Vol. 37, Issue 3, pp. 637-645, Jun. 2015. DOI: 10.4218/etrij.15.0114.1322.
  5. Q. Jing, M. Cheng, Y. Lu, W. Zhong, and H. Yao, "Pseudo-Noise Preamble based Joint Frame and Frequency Synchronization Algorithm in OFDM Communication Systems," Journal of Systems Engineering and Electronics, Vol. 25, Issue 1, pp. 1-9, Mar. 2014. DOI: 10.1109/JSEE.2014.00001.
  6. P. Lajevardi, A. P. Chandrakasan, and H. S. Lee, "Zero Crossing Detector Based Reconfigurable Analog System," IEEE Journal of Solid-State Circuits, Vol. 46, Issue 11, pp. 2478-2487, Nov. 2011. DOI: 10.1109/JSSC.2011.2164295
  7. Dae-Hyun Kim, Joon-Young Son, Kyung-Hoon Won, and Hyung-Jin Choi, "An Enhanced Demodulation Method for Capsule Endoscope," Proc. of Symposium of the Korean Institute of Communications and Information Sciences, pp. 500-501, Nov. 2012.
  8. Il-Muk Choi, Kyung-Hoon Won, and Hyung-Jin Choi, "Group Manchester Code Scheme for Medical In-body WBAN Systems," The Journal of The Korean Institute of Communications and Information Sciences, Vol. 36, No. 10, pp. 597-604, Oct. 2011. https://doi.org/10.7840/KICS.2011.36C.10.597
  9. Young-Hwa Jeong, "Performance Improvement of MSAGF-MMA Adaptive Blind Equalization Using Multiple Step-Size LMS," The Journal of The Institute of Internet, Broadcasting and Communication, Vol. 13, No. 4, pp. 83-89, Aug. 2013. DOI: http://dx.doi.org/10.7236/JIIBC.2013.13.4.83.
  10. Prakash Thapa, Shree Krishna Acharya,Jong-Gil Paik, Sang-Gil Choi, Hae-Ji Jun,Seong-Whan Kim, Seong Ro Lee, YeonwooLee, "A Cognitive Radio based for Smart Grid AMI Network using Adaptive Algorithm", The Journal of The Institute of Internet, Broadcasting and Communication, Vol. 8, No. 3, pp. 69-77, Aug. 2016.
  11. Joon-Young Son, Kyung-Hoon Won, and Hyung-Jin Choi, "A Low-Complexity Equalization for Capsule Endoscope," Proc. of Symposium of the Korean Institute of Communications and Information Sciences, pp. 63-64, Nov. 2012.