ASK-based spatial multiplexing RGB scheme using symbol-dependent self-interference for detection

Pergoloni, Stefano; Petroni, Andrea; Bui, Thai-Chien; Scarano, Gaetano; Cusani, Roberto; Biagi, Mauro

doi:10.1364/oe.25.015028

Cited by 8 publications

(6 citation statements)

References 19 publications

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“…Besides the intensity of light, the wavelength of emitted light can also be used as an additional dimension to convey information leading to several new modulation techniques such as color shift keying (CSK) [4] and color intensity modulation (CIM) [5]. However, wavelength modulation leads to increase the complexity of the transmission and detection hardware as color light sources and multiple color lenses/filters need to be employed [6].…”

Section: Introductionmentioning

confidence: 99%

Theoretical Analysis of Optical Spatial Multiple Pulse Position Modulation

Bui

Biagi

Kiravittaya

2018

2018 IEEE Global Communications Conference (GLOBECOM)

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This paper proposes an advanced multi-pulse multilight emitting diodes (LEDs) modulation technique to improve the efficiency for indoor visible light communication systems. The technique is referred to as spatial multiple pulse position modulation (SMPPM), and it is developed by combining a high spectral efficiency space shift keying (SSK) with a high energy efficiency multiple pulse position modulation (MPPM). During a symbol transmission, multiple active pulse slots and active LED indices are utilized as two degrees of freedom to modulate information which in turn provides the balance between the complexity, achievable spectral efficiency and energy efficiency. The analytical expression for symbol error rate (SER) of SMPPM in a multiple input multiple output system with multi-path propagation from reflection is derived theoretically using union bound technique and validated by means of Monte-Carlo simulations. Error performance of SMPPM is then evaluated extensively for different transceiver parameters and pulse configurations. Error rate distribution in a typical indoor workspace is plotted and analyzed. The SMPPM system achieves significantly higher spectral efficiency with respect to the conventional MPPM, SSK and spatial pulse position modulation (SPPM).

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Section: Introductionmentioning

confidence: 99%

Theoretical Analysis of Optical Spatial Multiple Pulse Position Modulation

Bui

Biagi

Kiravittaya

2018

2018 IEEE Global Communications Conference (GLOBECOM)

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“…If not different specified, the SNR in the simulations is equal to 23 dB corresponding to an emitting power of 1 W and distance between transmitter and receiver of 2.9 m. To explain better, the distance we reported is that from green LED, in the middle between red and blue, and the central PD having a green filter in front of it. We refer for modeling moth LEDs and PDS to the ones used in [8], Luxeon Star Rebel for LEDs and Vishay BPW34. Moreover, 5 synchronization symbols are used for training the semiblind equalizer and the µ lp learning factor is set to 10 −3 .…”

Section: Numerical Resultsmentioning

confidence: 99%

“…Thus it is possible to infer that the RS-STE has a more robust behavior over FS-STE when few reference symbols are available and the interference is high, along with the benefit of being less computational complex. Last, both TE and STE are compared with the zero-forcing (ZF) equalizer developed for ASK modulation in RGB transmission in [8]. In order to provide an unfair comparison for our technique, only for ZF, we assume to be in the case of perfect channel knowledge at the receiver.…”

Section: Numerical Resultsmentioning

confidence: 99%

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Space-time multichannel adaptive filtering scheme for VLC color cross-talk equalization

et al. 2018

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In the emerging framework of visible light communications, the limitation of modulation bandwidth of light emitting diodes (LEDs) transmitters is counterbalanced by the use of red-green-blue (RGB) LEDs since they exhibit higher modulation bandwidth. Using RGB LEDs allows to exploit the spatial multiplexing aspects, that is obtaining parallel channels for transmission. In this context, we used at the receiver RGB-tuned photodiodes (PDs). Hence each PD can, in principle, detect only the information its tuning is matched to. The drawback of increasing spectral efficiency is the presence of cross-talk at the single PD due to the signals emitted by the remaining colors when a perfect color filtering is not applied. In this paper we consider amplitude shift keying (ASK) modulation, investigate the issue of the spatial (color) interference and we present a blind multichannel adaptive equalizer able to mitigate the temporary intersymbol interference (ISI) and also the spatial (color) ISI, this latter partially suppressed using suitable color filters. We analyze also the convergence of the adaptive algorithm and compare its performance with the literature.

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“…Wu et al reported an eye-safe red/green/blue (RGB) LD based VLC system for white-light communication, achieving a data rate of 8 Gbit/s [6]. Multicolor VLC systems using spatial multiplexing and color shift keying have been reported [13,14].…”

Section: Introductionmentioning

confidence: 99%

20231 Gbit/s tricolor red/green/blue laser diode based bidirectional signal remodulation visible-light communication system

et al. 2018

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We propose and experimentally demonstrate a recorded 1-m bidirectional 20.231-Gbit/s tricolor R/G/B laser diode (LD) based visible-light communication (VLC) system supporting signal remodulation. In the signal remodulation system, an LD source is not needed at the client side. The client reuses the downstream signal sent from the central office (CO) and remodulates it to produce the upstream signal. As the LD sources are located at the CO, the laser wavelength and temperature managements at the cost-sensitive client side are not needed. This is the first demonstration, to our knowledge, of a >20 Gbit∕s data rate tricolor R/G/B VLC signal transmission supporting upstream remodulation.

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ASK-based spatial multiplexing RGB scheme using symbol-dependent self-interference for detection

Cited by 8 publications

References 19 publications

Theoretical Analysis of Optical Spatial Multiple Pulse Position Modulation

Theoretical Analysis of Optical Spatial Multiple Pulse Position Modulation

Space-time multichannel adaptive filtering scheme for VLC color cross-talk equalization

20231 Gbit/s tricolor red/green/blue laser diode based bidirectional signal remodulation visible-light communication system

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