Emerging Optical Wireless Communications-Advances and Challenges

Ghassemlooy, Zabih; Arnon, Shlomi; Uysal, Murat; Xu, Zhengyuan; Cheng, Julian

doi:10.1109/jsac.2015.2458511

Cited by 404 publications

(195 citation statements)

References 107 publications

(113 reference statements)

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“…The closed-form expression of average SER for the SIM M -PSK-based multi-aperture OWC system is derived in this section over GG fading links. For decoding of a complex M -PSK symbol´k, it 4 of 9 N. SHARMA, A. BANSAL AND P. GARG can be shown by using (5) and [20,Section 2.3] that the destination requires the calculation of a log likelihood function given as…”

Section: Performance Analysismentioning

confidence: 99%

“…Even the additional RF bandwidth allocation is no more a viable solution for increasing demand of higher data rates [1]. On the other hand, optical wireless communication (OWC) systems provide additional benefits of license-free operation, high data rates, easy deployment, and increased security [2][3][4][5][6][7], as compared with traditional RF communication systems. However, the atmospheric turbulence-induced fading is one of the major impairments affecting these OWC systems [8].…”

Section: Introductionmentioning

confidence: 99%

“…However, the atmospheric turbulence-induced fading is one of the major impairments affecting these OWC systems [8]. In the aforementioned studies [1][2][3][4][5][6][7][8], a very simple setup with single antenna node is considered, thus limiting the system performance due to the absence of diversity benefits.…”

Section: Introductionmentioning

confidence: 99%

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Generalized OSTBC‐based subcarrier intensity‐modulated MIMO optical wireless communication system

Sharma

Bansal

Garg

2016

Int J Communication

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In this paper, we analyze an optical wireless communication (OWC) system having a source and a destination node, equipped with multiple transmit and receive apertures, respectively. We utilize generalized orthogonal space-time block codes (OSTBCs) of any arbitrary order and subcarrier intensity modulation scheme for data transmission over gamma-gamma (GG) fading optical links using M -ary phase-shift keying (PSK) constellation. A symbol-wise decoding is utilized, and the closed-form expression of the approximate average symbol error rate (SER) of multi-aperture-based OWC system is obtained for the generalized OSTBC and an arbitrary M -PSK constellation. Using the derived SER expression, we analytically evaluate the diversity order and the coding gain of the OWC system with GG atmospheric turbulence. It has been shown by the numerical results that the maximum possible diversity is achieved by using the symbol-wise maximum likelihood decoding in the destination.

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Section: Performance Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Generalized OSTBC‐based subcarrier intensity‐modulated MIMO optical wireless communication system

Sharma

Bansal

Garg

2016

Int J Communication

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“…The rapid development of solid state lighting technologies has made the visible light communications (VLCs) a promising complementary scheme in the widely used radio frequency (RF)-based wireless communications in certain indoor and possible outdoor applications [1]. The main challenge of the VLC technology is the lack of sufficiently large bandwidth for modulation due to the fact that the white light emitting diodes (LEDs) used for VLC usually have a very small bandwidth, blue LED (BLED).…”

Section: Introductionmentioning

confidence: 99%

The Novel PAPR Reduction Schemes for O‐OFDM‐Based Visible Light Communications

Zhang¹,

Yao²,

Guo³

2017

Visible Light Communications

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In this chapter, we propose two novel peak-to-average power ratio (PAPR) reduction schemes for the asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM) scheme used in the visible light communications (VLC) system. In the first scheme, we implement the Toeplitz matrix based Gaussian blur method to reduce the high PAPR of ACO-OFDM at the transmitter and use the orthogonal matching pursuit algorithm to recover the original ACO-OFDM frame at the receiver. Simulation results show that for the 256-subcarrier ACO-OFDM system a~6 dB improvement in PAPR is achieved compared with the original ACO-OFDM in terms of the complementary cumulative distribution function (CCDF), while maintaining a competitive bit-error rate performance compared with the ideal ACO-OFDM lower bound. In the second scheme, we propose an improved hybrid optical orthogonal frequency division multiplexing (O-OFDM) and pulse-width modulation (PWM) scheme to reduce the PAPR for ACO-OFDM. The bipolar O-OFDM signal without negative clipping is converted into a PWM format where the leading and trailing edges carry the frame synchronization and modulated information, respectively. The simulation and experimental results demonstrate that the proposed OFDM-PWM scheme offers a significant PAPR reduction compared to the ACO-OFDM with an improved bit error rate.

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“…Over the past many years, free space optical (FSO) communication systems have been the focus of more studies than radio-frequency ones thanks to their smaller size and weight and reduced power consumption [1,2]. FSO systems have considered in satellite communication applications such as in satellite-to-ground stations, inter-satellite links, and deep-space communication applications [3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Effects of pointing errors and channel fading on the performance of free‐space optically‐preamplified PPM systems

Landolsi

Elrefaie²

2016

Int J Communication

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Summary In this paper, we study the impact of pointing errors and channel fading on the performance of free‐space, optically preamplified, M‐ary PPM systems. We consider two types of free‐space optical links: (i) inter‐satellite links and (ii) inter‐building links. For inter‐satellite links, only pointing error is considered. Starting with a Rayleigh model for the pointing error angle, we derive analytically the PDF for the pointing error parameter and for the signal‐to‐noise ratio (SNR) per bit. For inter‐building links, we derive the density function for the SNR per bit that includes the combined effects of pointing errors and channel fading, assuming Rayleigh‐distributed pointing errors. The channel fading models considered in this study for inter‐buildings links are the log‐normal and gamma–gamma models. We provide the error probability as a function of the average SNR per bit for both types of links. To cover systems with and without forward error correction, we compute the average SNR per bit required to achieve a bit error rate of 10−4 and 10−9. The corresponding power penalties are computed for different symbol sizes, scintillation indexes, and pointing jitters. Copyright © 2016 John Wiley & Sons, Ltd.

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Emerging Optical Wireless Communications-Advances and Challenges

Cited by 404 publications

References 107 publications

Generalized OSTBC‐based subcarrier intensity‐modulated MIMO optical wireless communication system

Generalized OSTBC‐based subcarrier intensity‐modulated MIMO optical wireless communication system

The Novel PAPR Reduction Schemes for O‐OFDM‐Based Visible Light Communications

Effects of pointing errors and channel fading on the performance of free‐space optically‐preamplified PPM systems

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