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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 9 — Apr. 23, 2012
  • pp: 10170–10179

Enhancement of LED indoor communications using OPPM-PWM modulation and grouped bit-flipping decoding

Aiying Yang, Xiangming Li, and Tao Jiang  »View Author Affiliations

Optics Express, Vol. 20, Issue 9, pp. 10170-10179 (2012)

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Combination of overlapping pulse position modulation and pulse width modulation at the transmitter and grouped bit-flipping algorithm for low-density parity-check decoding at the receiver are proposed for visible Light Emitting Diode (LED) indoor communication system in this paper. The results demonstrate that, with the same Photodetector, the bit rate can be increased and the performance of the communication system can be improved by the scheme we proposed. Compared with the standard bit-flipping algorithm, the grouped bit-flipping algorithm can achieve more than 2.0 dB coding gain at bit error rate of 10−5. By optimizing the encoding of overlapping pulse position modulation and pulse width modulation symbol, the performance can be further improved. It is reasonably expected that the bit rate can be upgraded to 400 Mbit/s with a single available LED, thus transmission rate beyond 1 Gbit/s is foreseen by RGB LEDs.

© 2012 OSA

OCIS Codes
(040.5160) Detectors : Photodetectors
(060.4510) Fiber optics and optical communications : Optical communications
(230.3670) Optical devices : Light-emitting diodes

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: February 7, 2012
Revised Manuscript: March 21, 2012
Manuscript Accepted: April 10, 2012
Published: April 18, 2012

Aiying Yang, Xiangming Li, and Tao Jiang, "Enhancement of LED indoor communications using OPPM-PWM modulation and grouped bit-flipping decoding," Opt. Express 20, 10170-10179 (2012)

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