Journal of Broadcast Engineering (방송공학회논문지)

The Korean Institute of Broadcast and Media Engineers (한국방송∙미디어공학회)
권호 표지
DOI QR코드

DOI QR Code

New Line Coding of Visible Light Communication System for WPAN

WPAN용 가시광 통신 시스템의 새로운 라인코딩

  • Kim, Jin-Young (Department of Wireless Communications Engineering, Kwangwoon University) ;
  • Choi, Jae-Hyuck (Department of Wireless Communications Engineering, Kwangwoon University) ;
  • Sang, Cha-Jae (Department of Media Engineering, Seoul National University of Technology)
  • Published : 2009.01.30
Download PDF
⟨ Previous Next ⟩

Abstract

We propose an ideal line coding for high speed data communication in visible light communication system. B4-HBT line coding is defined as follow. The 1 bit is +V at first though 1 encodes +Voltage and -Voltage doing change of shift each other, then -V newly. V that is been mutually contradictory for 1 bit that exist before that if continuous 0 bits exist 4 here same and reduces mistake because has reverse mark V in 4 continuous last 0 bits and gives half bit variation in 1 bit and made effect of noise low. 2${\sim}$3 dB profit is seen comparing with line coding that exist in simulation result.

가시광 통신(Visible Light Communication)시스템에서 고속 데이터 통신을 위한 최적의 line coding 기법을 제안한다. 새롭게 제안한 B4-HBT line coding은 1은 +Voltage와 -Voltage를 서로 교번하여 부호화하는데 1은 처음에는 +V, 그다음에는 -V로 서로 상반되게 극성을 대응하는 형태를 취한다. 여기에 연속적인 0비트가 4개가 존재하면 그전에 존재한 1비트에 상반되는 V를 같고 5개의 연속적인 마지막 0비트에서 반대부호 V를 갖고 1비트마다 반 비트 변이를 주어 오류를 줄이고 잡음의 영향을 적게 하였다. 시뮬레이션 결과에서 존재하고 있는 line coding과 비교하여 2${\sim}$3dB 이득을 보인다.

Keywords

References

  1. C. P. Kuo, R. M. Fletcher, T. D. Osentowski, M. C. Lardizabal, and M. G. Craford, “High performance AlGaInP visible light-emitting diodes,” Appl. Phys. Lett. vol. 57, no. 27, pp. 2937-2939, Dec. 1990. https://doi.org/10.1063/1.103736
  2. Y. Tanaka, S. Haruyama, and M. Nakagawa, "Wireless optical transmissions with the white colored LED for the wireless home links,” in Proc. of the 11th Int. Symp. Personal, Indoor and Mobile Radio Commun. (PIMRC 2000). London, UK, pp. 1325-1329. Sep. 2000 https://doi.org/10.1109/PIMRC.2000.881634
  3. T. Komine, Y. Tanaka, S. Haruyama, and M. Nakagawa, "Basic study on visible-light communication using light emitting diode illumination,” in Proc. of 8th Int. Symp. on Microwave and Optical Technol. (ISMOT 2001). Montreal, Canada, pp. 4548, 2001
  4. Masako Akanegawa, Yuichi Tanaka, and Masao Nakagawa. "Basic study on traffic information system using LED traffic lights," IEEE Trans. on Intelligent Transportation Systems, vol. 2, no. 4, pp. 197-203, Dec. 2001 https://doi.org/10.1109/6979.969365
  5. Y. Tanaka, T. Komine, S. Haruyama, and M. Nakagawa, “Indoor visible communication utilizing plural white LEDs as ligthing”, inProc.of 12th IEEE Int. Sympo. PIMRC, vol.2, Sept.2001, pp.81-85 https://doi.org/10.1109/PIMRC.2001.965300
  6. W. A. Krzymien, "Transmission performance analysis of a new class of line codes for optical fiber systems", IEEETrans. Commun., vol.37,no.4,1989, pp.402-404 https://doi.org/10.1109/26.20124
  7. J. G. Proakis, Digital Communication, 4thed., Mc-Graw Hill, New York,2001
  8. F. R. Gfeller and U. H. Bapst, “Wireless in-house data communication via diffuse infrared radiation”, in Proc. of IEEE ,vol.67,no.11, Nov. 1979, pp. 1474-1486 https://doi.org/10.1109/PROC.1979.11508
  9. J. R. Barry, J. M. Kahn, W. J. Krause, E. A. Lee, and D. G. Messerschmitt, “Simulation of multipath impulse response for indoor wireless optical channels”, IEEE J. Select .Areas Commun., vol.11,no.3, Apr.1993, pp.367-380 https://doi.org/10.1109/49.219552