Spatial Multiplexing in Optical Wireless MIMO Communications Over Indoor Environment

Takase, D.

doi:10.1093/ietcom/e89-b.4.1364

Cited by 14 publications

(8 citation statements)

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“…In this technique, the interference between spatial channels is modeled and used in communication system design directly to provide high spectral efficiency. Alternatively, interference can be minimized by allowing only a single laser element to transmit, as proposed in [76], or by using interference cancelation techniques at the receiver [77].…”

Section: Point-to-point Linksmentioning

confidence: 99%

A review of communication-oriented optical wireless systems

Borah

Boucouvalas

Davis

et al. 2012

J Wireless Com Network

188

104

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This article presents an overview of optical wireless (OW) communication systems that operate both in the short-(personal and indoor systems) and the long-range (outdoor and hybrid) regimes. Each of these areas is discussed in terms of (a) key requirements, (b) their application framework, (c) major impairments and applicable mitigation techniques, and (d) current and/or future trends. Personal communication systems are discussed within the context of point-to-point ultra-high speed data transfer. The most relevant application framework and related standards are presented, including the next generation Giga-IR standard that extends personal communication speeds to over 1 Gb/s. As far as indoor systems are concerned, emphasis is given on modeling the dispersive nature of indoor OW channels, on the limitations that dispersion imposes on user mobility and dispersion mitigation techniques. Visible light communication systems, which provide both illumination and communication over visible or hybrid visible/ infrared LEDs, are presented as the most important representative of future indoor OW systems. The discussion on outdoor systems focuses on the impact of atmospheric effects on the optical channel and associated mitigation techniques that extend the realizable link lengths and transfer rates. Currently, outdoor OW is commercially available at 10 Gb/s Ethernet speeds for Metro networks and Local-Area-Network interconnections and speeds are expected to increase as faster and more reliable optical components become available. This article concludes with hybrid optical wireless/radio-frequency (OW/RF) systems that employ an additional RF link to improve the overall system reliability. Emphasis is given on cooperation techniques between the reliable RF subsystem and the broadband OW system.

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Section: Point-to-point Linksmentioning

confidence: 99%

A review of communication-oriented optical wireless systems

Borah

Boucouvalas

Davis

et al. 2012

J Wireless Com Network

188

104

View full text Add to dashboard Cite

show abstract

“…Recently, the performance of multi-hop relaying FSO systems over atmospheric turbulence channels has been studied in (Datsikas, Peppas, Sagias, & Tombras, 2010;Safari & Uysal, 2008;Tsiftsis, Sandalidis, Karagiannidis, & Sagias, 2006). Moreover, recent studies have shown that similar to wireless communications, the effect of turbulence fading with pointing errors can be significantly relaxed by using the multiple-input multiple-output (MIMO) technique with multiple lasers at the transmitter and multiple photo-detectors at the receiver (Ai, 2018;Ai, Trung, & Tuan, 2016a;Ai, Trung, & Tuan, 2016b;Takase & Ohtsuki, 2005;Takase & Ohtsuki, 2006;Takase & Ohtsuki, 2014;Trung & Pham, 2014).…”

Section: Introductionmentioning

confidence: 99%

On the ASER performance of amplify-and-forward relaying MIMO/FSO systems using SC-QAM signals over log-normal and gamma-gamma atmospheric turbulence channels and pointing error impairments

Trung

Tuan

2020

Journal of Information and Telecommunication

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To cite this article: Duong Huu Ai, Ha Duyen Trung & Do Trong Tuan (2020): On the ASER performance of amplify-and-forward relaying MIMO/FSO systems using SC-QAM signals over log-normal and gamma-gamma atmospheric turbulence channels and pointing error impairments, Journal of Information and Telecommunication, ABSTRACTIn this work, we analyse pointing error effects on the performance of amplify-and-forward (AF) relaying multiple-input multiple-output (MIMO) free-space optical (FSO) communication system employing sub-carrier quadrature amplitude modulation (SC-QAM) signal over log-normal and gamma-gamma distributed atmospheric turbulence channels. We study the pointing error effects by taking into account the influence of beam-width, aperture size and jitter variance on the average symbol error rate (ASER), which is derived in closed-form expressions of MIMO/FSO and SISO/FSO systems. In addition, the number of relaying stations is taken into account in the statistical model of the combined channel including atmospheric loss, atmospheric turbulence and pointing error impairments. The numerical results show that by combining AF relaying stations and MIMO/FSO configurations, the link length can be extended because the transmitted power is reduced according to the amplifier gain. Moreover, the performance of AF relaying MIMO/FSO systems is better than that of AF relaying SISO/FSO systems at the same link length. ARTICLE HISTORY

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“…MIMO techniques have attracted a lot of attention in optical wireless communications as well. We have proposed optical wireless MIMO communications (OMIMO) to achieve a high speed transmission [7] [8]. We showed that the proposed OMIMO can realize a high rate transmission in directed channels.…”

Section: Introductionmentioning

confidence: 99%

Optical Wireless MIMO (OMIMO) with Backward Spatial Filter (BSF) in Diffuse Channels

Takase

Ohtsuki²

2007

2007 IEEE International Conference on Communications

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In this paper, we propose optical wireless multipleinput multiple-output (OMIMO) with backward spatial filter (BSF) in diffuse channels. In the proposed system BSF is constructed based on the channel state information (CSI) in the transmitter so that the received signal is free from multipath interference, which results in less receiver complexity and good performance. We show that the proposed system can achieve better bit error rate (BER) performance than the conventional single-input single output (SISO) system in diffuse chanels.

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Spatial Multiplexing in Optical Wireless MIMO Communications Over Indoor Environment

Cited by 14 publications

References 0 publications

A review of communication-oriented optical wireless systems

A review of communication-oriented optical wireless systems

On the ASER performance of amplify-and-forward relaying MIMO/FSO systems using SC-QAM signals over log-normal and gamma-gamma atmospheric turbulence channels and pointing error impairments

Optical Wireless MIMO (OMIMO) with Backward Spatial Filter (BSF) in Diffuse Channels

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