VLC Based Multi-hop Audio Data Transmission System

Jo, Seungwan; An, Beongku

doi:10.1007/978-3-642-38027-3_101

Cited by 9 publications

(4 citation statements)

References 3 publications

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“…Earlier works on relay assisted VLC systems include [11][12][13][14][15][16][17]. An LED-to-LED multi-hop VLC system for toys is demonstrated in [11].…”

Section: Introductionmentioning

confidence: 99%

“…Then, the performance of the multi-user system is evaluated in terms of medium access control (MAC) layer metrics such as collision rate and connectivity probability. In an experimental VLC study [13], an audio signal is successfully delivered to the destination over two intermediate relay terminals. In [14], a multi-hop inter-vehicular message forwarding scheme is considered for outdoor VLC systems and successful package delivery percentage is evaluated depending on the average inter-vehicle distance.…”

Section: Introductionmentioning

confidence: 99%

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Relay-Assisted OFDM-Based Visible Light Communications

Kızılırmak

Narmanlioglu

Uysal

2015

IEEE Trans. Commun.

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In this study, we investigate a relay-assisted visible light communication (VLC) system where an intermediate light source cooperates with the main light source. Specifically, we consider two light sources in an office space; one is the information source employed on the ceiling and the other one is a task light. Our system uses DC biased optical orthogonal frequency division multiplexing (DCO-OFDM) where the task light performs relaying to assist the communication and operates in half-duplex mode for both amplify-and-forward and decodeand-forward relaying. We investigate the bit error rate (BER) performance of the relay-assisted VLC system and optimize the performance through optimal AC/DC power allocation under illumination constraints. The DC power allocation is determined by sharing the number of LED chips between the terminals to satisfy a desired luminance ratio. The AC power allocation decides the fraction of the information signal power to be consumed at the terminals in order to minimize the BER. Numerical results reveal that cooperation brings significant performance gains over direct transmission. We further provide comparisons of two relaying techniques under consideration and discuss the effect of clipping noise on the error rate performance.

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“…Earlier works on relay assisted VLC systems include [11][12][13][14][15][16][17]. An LED-to-LED multi-hop VLC system for toys is demonstrated in [11].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Relay-Assisted OFDM-Based Visible Light Communications

Kızılırmak

Narmanlioglu

Uysal

2015

IEEE Trans. Commun.

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“…There is a growing literature on VLC, see e.g., [2] and [3] and the references therein; however, most works consider point-to-point (i.e., direct) transmission. More recent works [4]- [8] have further explored how cooperation among nodes (i.e., relay assisted transmission) can improve the performance of VLC systems. For example, an LED-to-LED multihop VLC system is demonstrated in [4] for very low data rate applications.…”

Section: Introductionmentioning

confidence: 99%

“…More recent works [4]- [8] have further explored how cooperation among nodes (i.e., relay assisted transmission) can improve the performance of VLC systems. For example, an LED-to-LED multihop VLC system is demonstrated in [4] for very low data rate applications. In [5], a multiuser VLC system is proposed where the message is forwarded via relays to the destination when the source-to-destination link is shadowed or blocked.…”

Section: Introductionmentioning

confidence: 99%

Relay-assisted OFDM-based visible light communications over multipath channels

Narmanlioglu

Kızılırmak

Uysal

2015

2015 17th International Conference on Transparent Optical Networks (ICTON)

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Due to copyright restrictions, the access to the full text of this article is only available via subscription.In this paper, we investigate the performance of relay-assisted visible light communication (VLC) system over multipath channels. We consider an indoor environment where the ceiling light serves as the information source and a desk light helps the source forward the information to the destination. The VLC system is built on orthogonal frequency division multiplexing (OFDM) with either amplify-and-forward or decode-and-forward relaying. A realistic channel impulse response of the indoor environment generated through ray tracing is used. Through simulations, we present the bit error rate performance of OFDM-based relay-assisted VLC system over indoor multipath channels and quantify the performance degradation with respect to idealistic single tap channels. We further discuss the impact of imperfect channel estimation on the performance.Qatar National Research Fun

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