Journal Pre-proof Time-efﬁcient adaptive modulation scheme for LACO-OFDM in VLC systems Xinda Yan, Jing He, Jin Shi, Zhihua Zhou, Qi Tang PII: S0030-4018(20)30486-7 DOI: https://doi.org/10.1016/j.optcom.2020.126069 Reference: OPTICS 126069 To appear in: Optics Communications Received date : 6 March 2020 Revised date : 3 May 2020 Accepted date : 4 May 2020 Please cite this article as: X. Yan, J. He, J. Shi et al., Time-efﬁcient adaptive modulation scheme for LACO-OFDM in VLC systems, Optics Communications (2020), doi: https://doi.org/10.1016/j.optcom.2020.126069. This is a PDF ﬁle of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the deﬁnitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its ﬁnal form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. © 2020 Published by Elsevier B.V.