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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 14 — Jul. 4, 2011
  • pp: 13418–13427

Performance improvement by tilting receiver plane in M-QAM OFDM visible light communications

Zixiong Wang, Changyuan Yu, Wen-De Zhong, and Jian Chen  »View Author Affiliations

Optics Express, Vol. 19, Issue 14, pp. 13418-13427 (2011)

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We propose a scheme to improve the SNR distribution as well as the spectral efficiency of M-QAM OFDM signal for indoor visible light communication by tilting the receiver plane. Newton method is employed for the photo-detector to receive maximum power by finding the optimal tilting angle. This method is a fast algorithm that only three searching steps are needed. The simulation results show that in the case of one LED source, the maximum spectral efficiency improvement is 0.44bit/s/Hz when the launching power of LED source is 12W; while in the case of four LED sources, the maximum spectral efficiency improvement is 0.21bit/s/Hz when the total launching power of the four LED sources is 12W.

© 2011 OSA

OCIS Codes
(060.4080) Fiber optics and optical communications : Modulation
(060.4230) Fiber optics and optical communications : Multiplexing
(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: March 29, 2011
Revised Manuscript: June 2, 2011
Manuscript Accepted: June 4, 2011
Published: June 27, 2011

Zixiong Wang, Changyuan Yu, Wen-De Zhong, and Jian Chen, "Performance improvement by tilting receiver plane in M-QAM OFDM visible light communications," Opt. Express 19, 13418-13427 (2011)

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