Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
권호 표지
DOI QR코드

DOI QR Code

Performance Analysis of OFDM-based Underwater Acoustic Communication System by Repeated Transmit Diversity Technique

반복 전송 다이버시티 기법에 따른 OFDM 기반 수중 음향 통신 시스템의 실해역 성능 분석

  • Chae, Kwang-Young (Department of Array Signal Processing, Hoseo University) ;
  • Ko, Hak-Lim (Department of Array Signal Processing, Hoseo University) ;
  • Kim, Min-Sang (Department of Array Signal Processing, Hoseo University) ;
  • Cho, Yong-Ho (Oceanic IT Convergence Technology Research Center, Hoseo University) ;
  • Im, Tae-Ho (Oceanic IT Convergence Technology Research Center, Hoseo University)
  • Received : 2019.07.26
  • Accepted : 2019.08.31
  • Published : 2019.11.30
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, the channel change was continuously measured for 24 hours from July 5, 2017 on the coast near Deokjeok-do, Incheon. The underwater channel has various channel environment characteristics as the change in the time axis and the change in the frequency axis occurs in real time, and the underwater communication performance decreases due to the multipath fading and the Doppler effect. Therefore, in this study, we performed the OFDM system performance analysis in the underwater channel environment by applying the repetitive transmission diversity scheme in the time and frequency domain to improve the communication performance in the real-world underwater communication environment. Using the collected data, we compared the channel environment in the time and frequency domain and analyzed the BER performance according to the pilot spacing and the number of repetitive transmissions in the time and frequency axis.

본 논문에서는 인천 덕적도 부근 해안에서 2017년 7월 5일부터 24시간 동안 채널 변화를 지속적으로 측정하였다. 수중 채널은 실시간으로 시간 축에서 변화와 주파수 축에서 변화가 발생함에 따라서 다양한 채널 환경 특성을 가지고 있으며, 다중 경로 페이딩 및 도플러 효과 등으로 인하여 수중 통신 성능저하가 발생한다. 따라서, 본 연구에서는 실해역 수중 통신 환경에서의 통신 성능 향상을 위하여 시간 및 주파수 영역에서의 반복 전송 다이버시티 기법을 적용하여 수중 채널 환경에서의 OFDM 시스템 성능 분석에 관한 연구를 수행하였다. 수집한 데이터를 이용하여 시간과 주파수 영역에서의 채널 환경 비교를 수행하였으며, 파일럿 배치 간격과 시간 및 주파수 축에서의 반복 전송 회수에 따른 BER 성능 분석을 수행하였다.

Keywords

Acknowledgement

This research was a part of the project titled 'Development of Distributed Underwater Monitoring & Control Networks', funded by the Ministry of Oceans and Fisheries, Korea. This research was supported by the MSIT (Ministry of Science and ICT), Korea, under the ITRC(Information Technology Research Center) support program (IITP-2019-2018-0-01417) supervised by the IITP(Institute for Information & communications Technology Promotion) This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government(MSIT) (No. NRF-2017R1C1B5074253).

References

  1. N. R. Kim, and J. H. Chung, "Trends of Underwater Communications and Channel Environment Characteristics," Journal of Korean Society for Internet Broadcasting and Communication, vol. 9, no. 5, pp. 243-247, Oct. 2009.
  2. J. H. Kim, T. H. Im, T. G. Chung, S. Y. Kim, and H. L. Ko, "A Study on the trends of recent underwater communication network systems," in Proceedings of Symposium of the Korean Institute of communications and Information Sciences, Seoul, Korea, pp. 678-679, 2015.
  3. A.Wang, B. Li, and Y. Zhang, "Underwater Acoustic Channels Characterization for Underwater Cognitive Acoustic Networks," in Proceeding of the 2018 International Conference on Intelligent Transportation, Big Data & Smart City, Xiamen, China, pp. 223-226, 2018.
  4. A. Radosevic, R. Ahmed, T. M. Duman, J. G. Proakis, and M. Stojanovic, "Adaptive OFDM modulation for underwater acoustic communications: Design considerations and experimental results," IEEE journal of oceanic engineering, vol. 39, no. 2, Apr. 2014.
  5. K. Y. Kim, M. S. Kim, H. L. Ko, and T. H. Im, "Performance analysis of OFDM and CDMA communication methods in underwater acoustic channel," The Journal of the Acoustical Society of Korea, vol. 38, no. 1, pp. 30-38, Jan. 2019. https://doi.org/10.7776/ASK.2019.38.1.030
  6. J. H. Kim, T. S. Lee, T. H. Im, M. S. Kim, K. L. Ko, and Y. H. Cho, "Performance analysis of pilot symbol spacing for OFDM system on measurement data at West sae," The Journal of Korean Institute of communications and Information Sciences, vol. 42, no. 12, pp. 52-53, Jul. 2017.
  7. Y. H. Cho, J. H. Kim, and H. L. Ko, "Performance analysis of Underwater OFDM Systems with Different Pilot Spacings in Western Sea of Korea," The Journal of Korean Institute of communications and Information Sciences, vol. 42, no. 12, pp. 2248-2254, Dec. 2017. https://doi.org/10.7840/kics.2017.42.12.2248
  8. H. Y. Kim, N. Y. Kim, H. J. Song, Y. J. Shin, D. W. Lim, and M. J. Rim, "Performance Comparisons of Diversity Techniques in OFDM Systems," in proceeding of the Korean Institute of Communication Sciences Conference, Gwangju, Korea, pp. 690-699, 2007.
  9. T. G. Chung, K. W. Kim, T. H. Im, Y. H. Cho, T. S. Lee, and H. L. Ko, "Performance analysis of OFDM system using frequency diversity on West Sea underwater," Journal of the Korean Institute of Communication Sciences, vol. 2017, no. 6, pp. 494-495, Jun. 2017.
  10. H. W. Jeon, S. J. Lee, and H. N. Lee, "Underwater Channel Analysis and Transmission Method Research via Coded OFDM," The Korean Institute of Communication Sciences, vol. 36, no. 5, pp.573-581, 2011.
  11. I. F. Akyildiz, D. pompili, and T. Melodia, "Challenges for efficient communication in underwater acoustic sensor networks," ACM SIGBED Review - Special issue on embedded sensor networks and wireless computing, vol. 1, no. 2, pp. 3-8, 2004.
  12. M. Stojanovic, and J. Preisig, "Underwater acoustic communication channels: Propagation models and statistical characterization," IEEE Communications Magazine, vol. 47, no. 1, pp. 84-89, Jan, 2009. https://doi.org/10.1109/MCOM.2009.4752682
  13. J.P. Kermoal, L. Schumacher, K.I. Pedersen, P.E. Mogensen, and F. Frederiksen, "A stochastic MIMO radio channel model with experimental validation," IEEE Journal on Selected Areas in Communications, vol. 20, no. 6, pp. 1211-1226, Aug. 2002. https://doi.org/10.1109/JSAC.2002.801223