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A Novel Transmit Array Structure for Optical Spatial Modulation

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Original languageEnglish
Title of host publicationICC 2019 - 2019 IEEE International Conference on Communications (ICC)
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
ISBN (Electronic)978-1-5386-8088-9
DOIs
Publication statusPublished - 15 Jul 2019
Event53rd IEEE International Conference on Communications: Empowering Intelligent Communications - Shanghai, China
Duration: 20 May 201924 May 2019
https://icc2019.ieee-icc.org/

Publication series

NameIEEE International Conference on Communications (ICC)
PublisherIEEE
ISSN (Electronic)1938-1883

Conference

Conference53rd IEEE International Conference on Communications
Abbreviated titleIEEE ICC 2019
CountryChina
CityShanghai
Period20/05/1924/05/19
Internet address

Abstract

The performance of multiple input single output (MISO) and multiple input multiple output (MIMO) systems is limited by spatial channel correlation. This limitation becomes more severe for light fidelity (LiFi) systems, which use intensity modulation/direct detection (IM/DD) for data transmission, due to lack of phase information and fading. This paper proposes a novel transmitter structure that provides spatially separated channels and enables optical MISO/MIMO spatial modulation (SM) transmission without the need for power allocation algo­rithm or a transmit precoding technique. A single light emitting diode (LED) array, which consists of multiple LEDs with different characteristics is considered in an indoor environment. Different numbers of transmit LEDs are chosen for SM transmission based on the relation between channel correlation and bit error probability. It is shown that the proposed structure provides reliable SM transmission when the number of transmit LEDs is considered as 2 and the modulation order for M -ary pulse amplitude modulation (PAM) is considered as 2 and 4. Computer simulations also show that higher modulation order, 8-PAM, can be supported with a cost of slightly higher bit error rate (BER) performance.

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