DOI QR코드

DOI QR Code

Novel Architecture for Efficient Implementation of Dimmable VPPM in VLC Lightings

  • Jeong, Jin-Doo (IT Convergence Technology Research Laboratory, ETRI) ;
  • Lim, Sang-Kyu (IT Convergence Technology Research Laboratory, ETRI) ;
  • Jang, Il-Soon (IT Convergence Technology Research Laboratory, ETRI) ;
  • Kim, Myung-Soon (IT Convergence Technology Research Laboratory, ETRI) ;
  • Kang, Tae-Gyu (IT Convergence Technology Research Laboratory, ETRI) ;
  • Chong, Jong-Wha (School of Electrical and Electronics Engineering, Hanyang University)
  • 투고 : 2014.03.31
  • 심사 : 2014.07.17
  • 발행 : 2014.12.01

초록

In this paper, a new architecture is proposed to achieve complexity efficiency in implementing variable pulse position modulation (VPPM). VPPM, specified in IEEE 802.15.7, can support wireless communication and dimming control simultaneously using visible light. The proposed architecture is based on the VPPM signal property in which the transition point of the modulated output is obtained by counting the sample index and comparing it to both the assigned dimming factor and the transmitting data. Therefore, the proposed architecture can be composed of simple logics, including a counter, a comparator, and an inverter, all of which are insensitive to the dimming resolution in contrast to a conventional codeword-table method. This paper describes the verification of the proposed algorithm through a register-transfer level implementation of the codeword and proposed architectures. In comparison with the codeword-table method, the proposed method gains a nine-fold complexity reduction at a 1% dimming-step resolution.

키워드

참고문헌

  1. IEEE Std. 802.15.7, IEEE Standard for Local and Metropolitan Area Networks - Part 15.7: Short-Range Wireless Optical Communication Using Visible Light, New York, NY, USA, 2011.
  2. S. Rajagopal, R.D. Roberts, and S.-K. Lim, "IEEE 802.15.7 Visible Light Communication - Modulation Schemes and Dimming Support," IEEE Commun. Mag., vol. 50, no. 3, Mar. 2012, pp. 72-82.
  3. K. Lee and H. Park, "Modulations for Visible Light Communications with Dimming Control," IEEE Photon. Technol. Lett., vol. 23, no. 16, Aug. 15, 2011, pp. 1136-1138. https://doi.org/10.1109/LPT.2011.2157676
  4. M. Rouissat, R.A. Borsali, and M.E. Chikh-Bled, "A New Modified MPPM for High-Speed Wireless Optical Communication Systems," ETRI J., vol. 35, no. 2, Apr. 2013, pp. 188-192. https://doi.org/10.4218/etrij.13.0112.0196
  5. I.E. Lee, M.L. Sim, and F.W.L. Kung, "Performance Enhancement of Outdoor Visible-Light Communication System Using Selective Combining Receiver," IET Optoelectron., vol. 3, no. 1, Feb. 2009, pp. 30-39. https://doi.org/10.1049/iet-opt:20070014
  6. G. Ntogari et al., "Combining Illumination Dimming Based on Pulse-Width Modulation with Visible-Light Communications Based on Discrete Multitone," J. Opt. Commun. Netw., vol. 3, no. 1, Jan. 2011, pp. 56-65. https://doi.org/10.1364/JOCN.3.000056
  7. K. Choi et al., "Visible Light Communications with Color and Dimming Control by Employing VPPM Coding," Int. Conf. Ubiquitous Future Netw., Phuket, Thailand, July 4-6, 2012, pp. 10-12.
  8. K. Choi et al., "Visible Light Communication with Color and Brightness Control of RGB LEDs," ETRI J., vol. 35, no. 5, Oct. 2013, pp. 927-930. https://doi.org/10.4218/etrij.13.0212.0425
  9. K.L. Sterckx and P. Saengudomlert, "Visible Light Communication via Dimmable LED Lamps Using Pulses of Equal Shape," European Conf. Netw. Opt. Commun., Newcastle upon Tyne, UK, July 20-22, 2011, pp. 48-51.
  10. M. Anand and P. Mishra, "A Novel Modulation Scheme for Visible Light Communication," IEEE India Conf., Kolkata, India, Dec. 17-19, 2010, pp. 1-3.
  11. P.-Y. Chen and Y.-M. Lin, "A Low-Cost VLC Implementation for MPEG-4," IEEE Trans. Circuits Syst.-II: Exp. Briefs, vol. 54, no. 6, June 2007, pp. 507-511. https://doi.org/10.1109/TCSII.2007.891752
  12. S.-C. Hsia, "Prototyping Implementation for Low-Complexity Real-Time MPEG-2 Variable Length Encoder," IEEE Int. Workshop System-on-Chip Real-Time Appl., Calgary, Canada, June 30-July 2, 2003, pp. 386-389.
  13. V. Pedroni, Circuit Design with VHDL, Cambridge, MA, USA: MIT Press, 2004, pp. 515-535.
  14. Mentor Graphics, ModelSim - Leading Simulation and Debugging, Mentor Graphics Corporation. Accessed Sept. 23, 2014. http://www.mentor.com/products/fpga/model
  15. Xilinx, FPGA Tutorials - ISE Design Suite Tutorials, Xilinx Inc. Accessed Sept. 23, 2014. http://www.xilinx.com/training/fpgatutorials.htm
  16. J. Gancarz, H. Elgala, and T.D.C. Little, "Impact of Lighting Requirements on VLC Systems," IEEE Commun. Mag., vol. 51, no. 12, Dec. 2013, pp. 34-41.
  17. H. Kim, S. Chang, and T.-G. Kang, "Enhancement of Particle Swarm Optimization by Stabilizing Particle Movement," ETRI J., vol. 35, no. 6, Dec. 2013, pp. 1168-1171. https://doi.org/10.4218/etrij.13.0213.0197
  18. S.-K. Lim et al., "Entertainment Lighting Control Network Standardization to Support VLC Services," IEEE Commun. Mag., vol. 51, no. 12, Dec. 2013, pp. 42-48.

피인용 문헌

  1. Visible Light Communication Method for Personalized and Localized Building Energy Management vol.38, pp.4, 2014, https://doi.org/10.4218/etrij.16.0116.0120
  2. Simplified and accelerated PPM receivers for VLC systems vol.12, pp.1, 2014, https://doi.org/10.1049/iet-opt.2017.0052