Journal of the Institute of Convergence Signal Processing (융합신호처리학회논문지)

The Korea Institute of Convergence Signal Processing (한국융합신호처리학회)
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Proposal of a non-coherent Communication Protocol with Ultra Sonic which can Improve the Communication Speed

넌코히어런트 전송 방식에서 초음파를 이용한 디지털 통신속도 개선 프로토콜 제안

  • Published : 2009.01.30
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Abstract

Propagation of electromagnetic wave in the water or underground is very difficult because of the conductivity of the propagation materials. In this case, we usually use acoustic signal as ultrasonic but, it is not easy to transfer long distance with coherent method because of time varying multipath, doppler effect, and attenuations. So, we use noncoherent method as FSK to communicate between long distances. But, as the propagation speed of acoustic sound is very slow, the BW of the channel is narrow. It is very hard to guaranty the enough speed of communication like digital image data. In this paper, we proposed a new data communication protocol which can transmit multi-bit digital data with every single ping, and improve the data communication speed in the water.

수중이나 지하에서는 매질의 전도성으로 인하여 전파를 이용한 무선 통신이 어렵다. 이러한 경우 초음파 등과 같은 음향신호를 이용하여 무선통신을 하는데 이 경우도 시변 다경로현상, 도플러효과, 각종 감쇄 등으로 인하여 코히어런트방식의 통신에서는 장거리 전송이 어렵다. 따라서 장거리 전송에서는 FSK 등과 같은 넌코히어런트방식의 데이터 전송방식을 사용하는데 이 경우 음향신호의 전송속도가 늦다는 특성 때문에 넓은 대역폭의 데이터 전송이 어렵다. 수중에서 다양한 통신 수요에 따라 음성통신 뿐만 아니라 화상 데이터 전송 등이 요구되는데 이와 같은 많은 데이터 전송시 넌코히어런트방식의 통신에서 그 요구조건을 만족시키기가 어렵다. 본 연구에서는 시간지연신호에 디지털 데이터를 실음으로써 동시에 8비트 또는 16비트 등과 같이 여러 비트의 데이터를 전송함으로써 전송속도를 개선할 수 있는 새로운 전송프로토콜을 제안한다.

Keywords

References

  1. J. C. Jones, A. Di Meglio, N. Aid, A. Sanchez and L. S. Wang, "The Use of Digital Signal Processors in Underwater Communication Systems," IEE Colloquium on Volume, Issue, 24 Sep 1997 p. 1204-1206, 2001.
  2. Jin-Ki Yeo, Young-kon Lim, Heung-Ho Lee," Modife MAC(Media Access Control) Protocol Design for the Acoustic-based Underwater Digital Data Communication," ISIE 2001, Pusan, Korea, pp.364-368, 2001.
  3. Yinghui, Stephen O Harrold, and L. F. Yeong," Experimental Study on Ultrasonic Signal Transmission within the Water-filled Pipes," 4th Annual Conference on Mechatronics and Machine Vision in Practice (M2VIP '97)" pp.93-98, 1997.
  4. Robert S. H. Istepanian, Milica Stojanovic, Underwater Acoustic Digital Signal Processing and Communication Systems, Kluwer Academic Publishers, 2002.
  5. Daniel B.Kilfoyle and Arthur B. Baggeroer, "The State of the Art in Underwater Acoustic Telemetry," IEEE Journal of Oceanic Engineering, Vol. 25, No. 1, pp.4-27, January 2008. https://doi.org/10.1109/48.820733
  6. Milica Stojanovic, Josko A. Catipovic, and John G. Prokis," Phase-Coherent Communications for Underwater Acoustic Channels," IEEE Journal of Oceanic Engineering, Vol. 19, No. 1, pp. 100-111, January 1994. https://doi.org/10.1109/48.289455
  7. Y. Choi, S. Kim, J. Park, Y. Lim, H. Ko, "A Digital Acoustic Transceiver for Underwater Communication without PLL and DLL," OCEANS 2003. Proceedings, 2003, pp.1781-1785.
  8. M. Stojanovic, J. Catipovic and J.Gi.Proakis, "An Algorithm for Multichannel Coherent Digital Communications Over Long Range Underwater Acoustic Telemetry Channels," OCEANS '92. 'Mastering the Oceans Through Technology'. Proceedings, Oct 1992, pp.577-581
  9. Xueyi Geng, ㅁㅁAdam Zielinskiㅁㅁ, "An eigenpath underwater acoustic communication channel model," OCEANS '95. MTS/IEEE. Challenges of Our Changing Global Environment. Conference Proceedings, Oct. 1995, pp. 1189-1196.
  10. F. Nickols, D. Ho, S.O. Harrold, R.T. Bradbeer, L. Yeung' "An ultrasonically controlled robot submarine for pipe inspection," Mechatronics and Machine Vision in Practice, 1997. Proceedings., Fourth Annual Conference on, Sept. 1997, pp.142-147.
  11. Milica Stojanovic, "Recent Advances in High-speed Underwater Acoustic Communications, IEEE Journal of Oceanic Engineering, Vol. 21, No. 2, pp.125-136, April 1996. https://doi.org/10.1109/48.486787
  12. Ian F. Akyildiz, Dario Pompili, Tommaso Melodia, "Underwater acoustic sensor networks: research challenges," Ad Hoc Networks 3 (2005) pp.257-279. https://doi.org/10.1016/j.adhoc.2005.01.004