Optical Wireless Communications Using Signal Space Diversity with Spatial Modulation

A signal space diversity (SSD) scheme was proposed to be incorporated with spatial modulation (SM) in an intensity-modulation/direct-detection-based multiple-input-single-output (MISO) indoor optical wireless communication (OWC) system to improve bit-error-rate (BER) performance and system throughpu...

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Autores principales:	Tingting Song, Christina Lim, Ampalavanapillai Nirmalathas, Ke Wang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	optical wireless communications spatial modulation signal constellation rotation diversity interleaving channel gain difference Applied optics. Photonics TA1501-1820
Acceso en línea:	https://doaj.org/article/6c781c3eb3464e8ba2d69874d1f76276
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spelling	oai:doaj.org-article:6c781c3eb3464e8ba2d69874d1f762762021-11-25T18:43:00ZOptical Wireless Communications Using Signal Space Diversity with Spatial Modulation10.3390/photonics81104682304-6732https://doaj.org/article/6c781c3eb3464e8ba2d69874d1f762762021-10-01T00:00:00Zhttps://www.mdpi.com/2304-6732/8/11/468https://doaj.org/toc/2304-6732A signal space diversity (SSD) scheme was proposed to be incorporated with spatial modulation (SM) in an intensity-modulation/direct-detection-based multiple-input-single-output (MISO) indoor optical wireless communication (OWC) system to improve bit-error-rate (BER) performance and system throughput. SSD was realized via signal constellation rotation and diversity interleaving using different channel gains to improve the BER. With SM incorporated, the MISO-OWC system throughput increased. Theoretical BER expressions of the SSD scheme were established for the first time by investigating the distance of neighboring constellation symbols upon maximum-likelihood detection. Such BER expressions were further verified by numerical results. The results showed that, except for the slightly-lower-accuracy performance brought by comparable distances of neighboring constellation symbols in cases of low signal-to-noise ratios, these BER expressions were accurate in most scenarios. Moreover, theoretical investigations of channel gain distributions were performed at different signal constellation rotation angles to show the capability of the SSD scheme to improve the BER. The results showed that a significantly improved BER by two orders of magnitude could be achieved using a reasonably high channel-gain ratio and a larger constellation rotation angle. The SSD-SM scheme provides a promising option to achieve transmitter diversity with an enhanced throughput in high-speed indoor OWC systems.Tingting SongChristina LimAmpalavanapillai NirmalathasKe WangMDPI AGarticleoptical wireless communicationsspatial modulationsignal constellation rotationdiversity interleavingchannel gain differenceApplied optics. PhotonicsTA1501-1820ENPhotonics, Vol 8, Iss 468, p 468 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	optical wireless communications spatial modulation signal constellation rotation diversity interleaving channel gain difference Applied optics. Photonics TA1501-1820
spellingShingle	optical wireless communications spatial modulation signal constellation rotation diversity interleaving channel gain difference Applied optics. Photonics TA1501-1820 Tingting Song Christina Lim Ampalavanapillai Nirmalathas Ke Wang Optical Wireless Communications Using Signal Space Diversity with Spatial Modulation
description	A signal space diversity (SSD) scheme was proposed to be incorporated with spatial modulation (SM) in an intensity-modulation/direct-detection-based multiple-input-single-output (MISO) indoor optical wireless communication (OWC) system to improve bit-error-rate (BER) performance and system throughput. SSD was realized via signal constellation rotation and diversity interleaving using different channel gains to improve the BER. With SM incorporated, the MISO-OWC system throughput increased. Theoretical BER expressions of the SSD scheme were established for the first time by investigating the distance of neighboring constellation symbols upon maximum-likelihood detection. Such BER expressions were further verified by numerical results. The results showed that, except for the slightly-lower-accuracy performance brought by comparable distances of neighboring constellation symbols in cases of low signal-to-noise ratios, these BER expressions were accurate in most scenarios. Moreover, theoretical investigations of channel gain distributions were performed at different signal constellation rotation angles to show the capability of the SSD scheme to improve the BER. The results showed that a significantly improved BER by two orders of magnitude could be achieved using a reasonably high channel-gain ratio and a larger constellation rotation angle. The SSD-SM scheme provides a promising option to achieve transmitter diversity with an enhanced throughput in high-speed indoor OWC systems.
format	article
author	Tingting Song Christina Lim Ampalavanapillai Nirmalathas Ke Wang
author_facet	Tingting Song Christina Lim Ampalavanapillai Nirmalathas Ke Wang
author_sort	Tingting Song
title	Optical Wireless Communications Using Signal Space Diversity with Spatial Modulation
title_short	Optical Wireless Communications Using Signal Space Diversity with Spatial Modulation
title_full	Optical Wireless Communications Using Signal Space Diversity with Spatial Modulation
title_fullStr	Optical Wireless Communications Using Signal Space Diversity with Spatial Modulation
title_full_unstemmed	Optical Wireless Communications Using Signal Space Diversity with Spatial Modulation
title_sort	optical wireless communications using signal space diversity with spatial modulation
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/6c781c3eb3464e8ba2d69874d1f76276
work_keys_str_mv	AT tingtingsong opticalwirelesscommunicationsusingsignalspacediversitywithspatialmodulation AT christinalim opticalwirelesscommunicationsusingsignalspacediversitywithspatialmodulation AT ampalavanapillainirmalathas opticalwirelesscommunicationsusingsignalspacediversitywithspatialmodulation AT kewang opticalwirelesscommunicationsusingsignalspacediversitywithspatialmodulation
_version_	1718410776922816512

Optical Wireless Communications Using Signal Space Diversity with Spatial Modulation

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