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dc.contributor.authorYeşilkaya, Anıl
dc.contributor.authorBasar, Ertugrul
dc.contributor.authorMiramirkhani, Farshad
dc.contributor.authorPanayirci, Erdal
dc.contributor.authorUysal, Murat
dc.contributor.authorHaas, Harald
dc.date.accessioned2019-06-27T08:01:17Z
dc.date.available2019-06-27T08:01:17Z
dc.date.issued2017
dc.identifier.issn0090-6778
dc.identifier.issn1558-0857
dc.identifier.urihttps://hdl.handle.net/20.500.12469/329
dc.identifier.urihttps://doi.org/10.1109/TCOMM.2017.2699964
dc.description.abstractVisible light communications (VLC) is a promising and uncharted new technology for the next generation of wireless communication systems. This paper proposes a novel generalized light emitting diode (LED) index modulation method for multiple-input-multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM)-based VLC systems. The proposed scheme avoids the typical spectrum efficiency losses incurred by time- and frequency-domain shaping in OFDM signals. This is achieved by exploiting spatial multiplexing along with LED index modulation. Accordingly real and imaginary components of the complex time-domain OFDM signals are separated first then resulting bipolar signals are transmitted over a VLC channel by encoding sign information in LED indexes. As a benchmark we demonstrate the performance analysis of our proposed system for both analytical and physical channel models. Furthermore two novel receiver designs are proposed. Each one is suitable for frequency-flat or selective channel scenarios. It has been shown via extensive computer simulations that the proposed scheme achieves considerably better bit error ratio versus signal-to-noise-ratio performance than the existing VLC-MIMO-OFDM systems that use the same number of transmit and receive units [LEDs and photo diodes (PDs)]. Compared with the single-input single-output (SISO) DC biased optical (DCO)-OFDM system both spectral efficiency and DC bias can be doubled and removed respectively simply by exploiting a MIMO configuration.
dc.language.isoEnglish
dc.publisherIEEE-INST Electrical Electronics Engineers Inc
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectVisible light communications (VLC)
dc.subjectMultiple-input-multiple-output (MIMO) systems
dc.subjectOrthogonal
dc.titleOptical MIMO-OFDM With Generalized LED Index Modulation
dc.typeArticle
dc.identifier.startpage3429
dc.identifier.endpage3441
dc.relation.journalIEEE Transactions on Communications
dc.identifier.issue8
dc.identifier.volume65
dc.identifier.wosWOS:000411006100018
dc.identifier.doi10.1109/TCOMM.2017.2699964
dc.contributor.khasauthorYeşilkaya, Anıl
dc.contributor.khasauthorPanayirci, Erdal


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