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dc.contributor.authorChen, Shih-Haoen_US
dc.contributor.authorChow, Chi-Waien_US
dc.date.accessioned2015-07-21T08:29:04Z-
dc.date.available2015-07-21T08:29:04Z-
dc.date.issued2015-01-15en_US
dc.identifier.issn0030-4018en_US
dc.identifier.urihttp://dx.doi.org/10.1016/j.optcom.2014.09.042en_US
dc.identifier.urihttp://hdl.handle.net/11536/124037-
dc.description.abstractMultiple-input and multiple-output (MIMO) scheme can extend the transmission capacity for the lightemitting-diode (LED) based visible light communication (VLC) systems. The MIMO VLC system that uses the mobile-phone camera as the optical receiver (Rx) to receive MIMO signal from the n x n Red-GreenBlue (RGB) LED array is desirable. The key step of decoding this signal is to detect the signal direction. If the LED transmitter (Tx) is rotated, the Rx may not realize the rotation and transmission error can occur. In this work, we propose and demonstrate a novel hierarchical transmission scheme which can reduce the computation complexity of rotation detection in LED array VLC system. We use the n x n RGB LED array as the MIMO Tx. In our study, a novel two dimensional Hadamard coding scheme is proposed. Using the different LED color layers to indicate the rotation, a low complexity rotation detection method can be used for improving the quality of received signal. The detection correction rate is above 95% in the indoor usage distance. Experimental results confirm the feasibility of the proposed scheme. (C) 2014 Elsevier B.V. All rights reserveden_US
dc.language.isoen_USen_US
dc.subjectVisible light communication (VLC)en_US
dc.subjectOptical wireless communication (OW)en_US
dc.subjectMultiple-input and multiple-output (MIMO)en_US
dc.titleHierarchical scheme for detecting the rotating MIMO transmission of the in-door RGB-LED visible light wireless communications using mobile-phone cameraen_US
dc.typeArticleen_US
dc.identifier.doi10.1016/j.optcom.2014.09.042en_US
dc.identifier.journalOPTICS COMMUNICATIONSen_US
dc.citation.volume335en_US
dc.citation.spage189en_US
dc.citation.epage193en_US
dc.contributor.department光電工程學系zh_TW
dc.contributor.departmentDepartment of Photonicsen_US
dc.identifier.wosnumberWOS:000345641500033en_US
dc.citation.woscount0en_US
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