Experimental demonstration of generalised space shift keying for visible light communication

Bian, Rui; Videv, Stefan; Griffiths, Alexander D.; McKendry, Jonathan J. D.; Xie, Enyuan; Gu, Erdan; Dawson, Martin D.; Haas, Harald

doi:10.1109/blackseacom.2017.8277716

Cited by 4 publications

(2 citation statements)

References 22 publications

(24 reference statements)

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“…The DC balanced codes have equal number of zeros and ones in all of their codewords ensuring constant weight codewords. In [11]- [13], a generalized space shift keying technique and in [14], a trace-orthogonal based pulse position modulation space time block code (STBC) has been designed for multiple input multiple output (MIMO) VLC systems. In [15], a coding scheme for uniform illumination in MIMO VLC systems has been proposed.…”

Section: Introductionmentioning

confidence: 99%

MIMO Codes for Uniform Illumination Across Space and Time in VLC With Dimming Control

2019

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Indoor visible light communications (VLC) require simultaneous illumination and communication. Hence, uniformity in the illumination is a key consideration for user comfort and data transfer in the VLC systems. Several run-length-limited codes have been proposed in the literature that mitigate flicker for single-input and single-output VLC systems. Recently, codes have been proposed for multiple-input multiple-output (MIMO) VLC systems. However, uniform illumination along with dimming control has not been considered for MIMO VLC systems. Hence, in this paper, we propose codes with generalized algorithms for encoding and decoding that maintain consistency in the illumination across space and time and achieve the desired dimming level. We present the expressions for code rate, run-length, and Hamming distance for the proposed codes. Through Monte Carlo simulations, we compare the code matrix error rate (CER) performance of the proposed codes with zero-forcing, minimum mean square error, and maximum likelihood based detectors for various number of transmit and receive antennas. We also compare the mutual information of the proposed codes for various number of transmit and receive antennas. The numerical results show that the proposed codes exhibit good performance while satisfying the design criteria.

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Section: Introductionmentioning

confidence: 99%

MIMO Codes for Uniform Illumination Across Space and Time in VLC With Dimming Control

2019

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“…The DC balanced codes have equal number of zeros and ones in all of their codewords ensuring constant weight codewords. A generalized space shift keying technique for multiple input multiple out (MIMO) VLC systems has been proposed in [10], [11], [12]. However, consistency in illumination for all the transmit antennas (LEDs) has not been considered.…”

Section: Introductionmentioning

confidence: 99%

MIMO Codes for Uniform Illumination across Space and Time in VLC with Dimming Control

Uday¹,

Kumar²,

Natarajan³

2019

Preprint

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Indoor visible light communications (VLC) require simultaneous illumination and communication. Hence, uniformity in the illumination is a key consideration for user comfort and data transfer in VLC systems. Several run-length limited codes have been proposed in the literature which mitigate flicker for single input and single output VLC systems. Recently, codes have been proposed for multiple input multiple output (MIMO) VLC systems. However, uniform illumination along with dimming control has not been considered for MIMO VLC systems. Hence, in this paper, we propose codes with generalized algorithms for encoding and decoding that maintain consistency in the illumination across space and time and achieve the desired dimming level. We present the expressions for code rate, run-length, and Hamming distance for the proposed codes. Through Monte Carlo simulations, we compare the codeword error rate (CER) performance of the proposed codes with zero-forcing, minimum mean square error, and maximum likelihood detectors for various number of transmit and receive antennas. We also compare the mutual information of the proposed codes for various number of transmit and receive antennas. The numerical results show that the proposed codes exhibit good performance while satisfying the design criteria.

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Experimental Multi-User Visible Light Communication Attocell Using Multiband Carrierless Amplitude and Phase Modulation

2019

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Multi-band carrierless amplitude and phase modulation and subcarrier multiplexing (SCM) are combined to produce a novel multi-users access scheme for visible light communications (VLC). To demonstrate this scheme, an experimental and realistic scenario is setup by using a low-cost commercial office white light-emitting diode (LED) downlight. Furthermore, subcarrier spacings are added to reduce the inter-channel interferences and the parameters of the pulse shaping filters are optimized. The distance between the transmitter and the receiver is fixed at 2.15 m. After the optimization, the experiment setup achieves a spectral efficiency of 5.08 b/s/Hz after subcarrier spacing and with very light post-processing. A total of 20 users can be provided with the multi-users access scheme with a sum data rate of 162.5 Mb/s. The receiving attocell is measured at 4.56 m 2. To the best of our knowledge, the resulting work presents the highest range, and one of the highest spectral efficiencies for a phosphorous white LED (ph-LED)-based VLC system, thanks to subcarrier spacing. With SCM, it is also the first ph-LED-based VLC multi-users system.

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Experimental demonstration of generalised space shift keying for visible light communication

Cited by 4 publications

References 22 publications

MIMO Codes for Uniform Illumination Across Space and Time in VLC With Dimming Control

MIMO Codes for Uniform Illumination Across Space and Time in VLC With Dimming Control

MIMO Codes for Uniform Illumination across Space and Time in VLC with Dimming Control

Experimental Multi-User Visible Light Communication Attocell Using Multiband Carrierless Amplitude and Phase Modulation

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