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

Zixiong Wang, Changyuan Yu, Wen De Zhong, Jian Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

49 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)13418-13427
Number of pages10
JournalOptics Express
Issue number14
Publication statusPublished - 4 Jul 2011
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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