한국ITS학회 논문지 (The Journal of The Korea Institute of Intelligent Transport Systems)

  • 제17권5호
  • /
  • Pages.135-142
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  • 2018
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  • 1738-0774(pISSN)
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  • 2384-1729(eISSN)
한국ITS학회 (The Korea Institute of Intelligent Transport Systems)
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수중 음향 환경에 따른 CDMA와 OFDM 성능 분석

Performance Analysis of CDMA and OFDM on Underwater Acoustic Environments

  • 투고 : 2018.10.05
  • 심사 : 2018.10.24
  • 발행 : 2018.10.31
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초록

본 논문은 수중 음향 채널 환경에 따른 CDMA(code division multiple access)와 OFDM(orthogonal frequency division multiplexing) 전송기법의 장단점을 비교 분석한다. 이를 위해서 r.m.s.(root mean square) 지연시간과 도플러 주파수 그리고 다중 경로의 수를 변화시켜가며 다양한 수중 음향 채널에서 전산 모의실험을 수행하였다. r.m.s. 지연시간과 도플러 주파수가 각 전송기법의 설계치 내의 수치이며 동일한 전송률을 갖는 경우 CDMA가 OFDM에 비해 우수한 성능을 갖는 것을 보였다. 그러나 도플러가 설계치보다 큰 경우에는 CDMA의 성능이 저하되어 OFDM이 CDMA보다 우수한 것을 보였다.

This paper compares and analyzes advantages and disadvantages of CDMA(code division multiple access) and OFDM(orthogonal frequency division multiplexing) transmission techniques for underwater acoustic channel environments. Computer simulations were carried out in various underwater acoustic channels with varying r.m.s.(root mean square) delay, doppler frequency and the number of multipaths. When r.m.s. delay and doppler frequency are within the tolerance of designed transmission schemes, the computer simulations show that CDMA has better BER performance than that of the OFDM. However, when the doppler frequency exceeds the tolerance, BER performance of the CDMA decreases.

키워드

참고문헌

  1. Catipovic J. A. (1990), "Performance Limitations in Underwater Acoustic Telemetry," IEEE J. Ocean. Eng., vol 15, no. 3, pp. 205-216. https://doi.org/10.1109/48.107149
  2. Fazel K. (1993), "Performance of CDMA/OFDM for mobile communication system," in Proc. IEEE Int. Conf. Universal Pers. Comm., vol. 2, pp.975-P979.
  3. Han J. W. et al. (2010), "Performance Analysis of Acoustic Communication using OFDM Modulation in Underwater," J. Navigation and Port Research, vol. 34, no. 10, pp.769-774. https://doi.org/10.5394/KINPR.2010.34.10.769
  4. Kilfoyle D. et al. (2000), "The State of the Art in Underwater Acoustic Telemetry," IEEE J. of Ocean Eng., vol. 25, pp.4-27. https://doi.org/10.1109/48.820733
  5. Lee H. J. et al. (2017), "Performance Analysis of UWA Communication System by Diversity in UWA Channel," JCCT, vol. 3, no. 4, pp.191-198.

피인용 문헌

  1. Biomimicking Covert Communication by Time-Frequency Shift Modulation for Increasing Mimicking and BER Performances vol.21, pp.6, 2018, https://doi.org/10.3390/s21062184