Abstract

We propose and experimentally demonstrate an optical camera communication (OCC) supporting user mobility. A mobile test platform is designed to emulate user mobility. In the mobile scenario, dynamic column matrix selection algorithm is proposed to select an appropriate column matrix with high extinction-ratio (ER) while avoiding the blooming effect. The mobile phone is placed on the moving track to receive the visible light at a vertical distance of 60 cm. By varying the moving speed at 20, 40, 60, 80, and 100 cm/s and lateral distance at 50 and 70 cm respectively, the system performance using the proposed algorithm is investigated. The experimental results show that with the increase of lateral distance (far from the light source) and user moving speed, the system performance gets degraded. Moreover, it demonstrates that the mobile system can achieve a throughput of 4.08 kbps under a low illuminance of 275 lx.

© 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

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References

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  1. D. Tsonev, S. Videv, and H. Haas, “Towards a 100 Gb/s visible light wireless access network,” Opt. Express 23(2), 1627–1637 (2015).
    [Crossref] [PubMed]
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    [Crossref]
  3. Y. Hong and L.-K. Chen, “Toward user mobility for OFDM-based visible light communications,” Opt. Lett. 41(16), 3763–3766 (2016).
    [Crossref] [PubMed]
  4. Y. Wang, L. Tao, X. Huang, J. Shi, and N. Chi, “8-Gb/s RGBY LED-Based WDM VLC system employing high-order CAP modulation and hybrid post equalizer,” IEEE Photonics J. 7(6), 7904507 (2015).
  5. A. Sewaiwar, S. V. Tiwari, and Y. H. Chung, “Mobility support for full-duplex multiuser bidirectional VLC networks,” IEEE Photonics J. 7(6), 7904709 (2015).
    [Crossref]
  6. J. Shi, Y. Wang, X. Huang, and N. Chi, “Enabling mobility in LED based two nodes VLC network employing self-adaptive STBC,” in Optical Fiber Communication Conference (OFC 2018), paper Th2A.23.
    [Crossref]
  7. W.-C. Wang, C.-W. Chow, L.-Y. Wei, Y. Liu, and C.-H. Yeh, “Long distance non-line-of-sight (NLOS) visible light signal detection based on rolling-shutter-patterning of mobile-phone camera,” Opt. Express 25(9), 10103–10108 (2017).
    [Crossref] [PubMed]
  8. C. W. Chow, C. Y. Chen, and S. H. Chen, “Enhancement of signal performance in LED visible light communications using mobile phone camera,” IEEE Photonics J. 7(5), 7903607 (2015).
    [Crossref]
  9. Y. Liu, C.-W. Chow, K. Liang, H.-Y. Chen, C.-W. Hsu, C.-Y. Chen, and S.-H. Chen, “Comparison of thresholding schemes for visible light communication using mobile-phone image sensor,” Opt. Express 24(3), 1973–1978 (2016).
    [Crossref] [PubMed]
  10. J. Shi, J. He, J. He, R. Deng, Y. Wei, F. Long, Y. Cheng, and L. Chen, “Multilevel modulation scheme using the overlapping of two light sources for visible light communication with mobile phone camera,” Opt. Express 25(14), 15905–15912 (2017).
    [Crossref] [PubMed]
  11. R. Deng, J. He, Y. Hong, J. Shi, and L. Chen, “2.38 Kbits/frame WDM transmission over a CVLC system with sampling reconstruction for SFO mitigation,” Opt. Express 25(24), 30575–30581 (2017).
    [Crossref] [PubMed]
  12. K. Liang, C.-W. Chow, and Y. Liu, “Mobile-phone based visible light communication using region-grow light source tracking for unstable light source,” Opt. Express 24(15), 17505–17510 (2016).
    [Crossref] [PubMed]

2017 (3)

2016 (3)

2015 (4)

Y. Wang, L. Tao, X. Huang, J. Shi, and N. Chi, “8-Gb/s RGBY LED-Based WDM VLC system employing high-order CAP modulation and hybrid post equalizer,” IEEE Photonics J. 7(6), 7904507 (2015).

A. Sewaiwar, S. V. Tiwari, and Y. H. Chung, “Mobility support for full-duplex multiuser bidirectional VLC networks,” IEEE Photonics J. 7(6), 7904709 (2015).
[Crossref]

C. W. Chow, C. Y. Chen, and S. H. Chen, “Enhancement of signal performance in LED visible light communications using mobile phone camera,” IEEE Photonics J. 7(5), 7903607 (2015).
[Crossref]

D. Tsonev, S. Videv, and H. Haas, “Towards a 100 Gb/s visible light wireless access network,” Opt. Express 23(2), 1627–1637 (2015).
[Crossref] [PubMed]

Chen, C. Y.

C. W. Chow, C. Y. Chen, and S. H. Chen, “Enhancement of signal performance in LED visible light communications using mobile phone camera,” IEEE Photonics J. 7(5), 7903607 (2015).
[Crossref]

Chen, C.-Y.

Chen, H.-Y.

Chen, L.

Chen, L.-K.

Chen, S. H.

C. W. Chow, C. Y. Chen, and S. H. Chen, “Enhancement of signal performance in LED visible light communications using mobile phone camera,” IEEE Photonics J. 7(5), 7903607 (2015).
[Crossref]

Chen, S.-H.

Cheng, Y.

Chi, N.

Y. Wang, L. Tao, X. Huang, J. Shi, and N. Chi, “8-Gb/s RGBY LED-Based WDM VLC system employing high-order CAP modulation and hybrid post equalizer,” IEEE Photonics J. 7(6), 7904507 (2015).

Chow, C. W.

C. W. Chow, C. Y. Chen, and S. H. Chen, “Enhancement of signal performance in LED visible light communications using mobile phone camera,” IEEE Photonics J. 7(5), 7903607 (2015).
[Crossref]

Chow, C.-W.

Chung, Y. H.

A. Sewaiwar, S. V. Tiwari, and Y. H. Chung, “Mobility support for full-duplex multiuser bidirectional VLC networks,” IEEE Photonics J. 7(6), 7904709 (2015).
[Crossref]

Deng, R.

Haas, H.

He, J.

Hong, Y.

Hsu, C.-W.

Huang, X.

Y. Wang, L. Tao, X. Huang, J. Shi, and N. Chi, “8-Gb/s RGBY LED-Based WDM VLC system employing high-order CAP modulation and hybrid post equalizer,” IEEE Photonics J. 7(6), 7904507 (2015).

Liang, K.

Liu, Y.

Long, F.

Sewaiwar, A.

A. Sewaiwar, S. V. Tiwari, and Y. H. Chung, “Mobility support for full-duplex multiuser bidirectional VLC networks,” IEEE Photonics J. 7(6), 7904709 (2015).
[Crossref]

Shi, J.

Tao, L.

Y. Wang, L. Tao, X. Huang, J. Shi, and N. Chi, “8-Gb/s RGBY LED-Based WDM VLC system employing high-order CAP modulation and hybrid post equalizer,” IEEE Photonics J. 7(6), 7904507 (2015).

Tiwari, S. V.

A. Sewaiwar, S. V. Tiwari, and Y. H. Chung, “Mobility support for full-duplex multiuser bidirectional VLC networks,” IEEE Photonics J. 7(6), 7904709 (2015).
[Crossref]

Tsonev, D.

Videv, S.

Wang, W.-C.

Wang, Y.

Y. Wang, L. Tao, X. Huang, J. Shi, and N. Chi, “8-Gb/s RGBY LED-Based WDM VLC system employing high-order CAP modulation and hybrid post equalizer,” IEEE Photonics J. 7(6), 7904507 (2015).

Wei, L.-Y.

Wei, Y.

Yeh, C.-H.

IEEE Photonics J. (3)

Y. Wang, L. Tao, X. Huang, J. Shi, and N. Chi, “8-Gb/s RGBY LED-Based WDM VLC system employing high-order CAP modulation and hybrid post equalizer,” IEEE Photonics J. 7(6), 7904507 (2015).

A. Sewaiwar, S. V. Tiwari, and Y. H. Chung, “Mobility support for full-duplex multiuser bidirectional VLC networks,” IEEE Photonics J. 7(6), 7904709 (2015).
[Crossref]

C. W. Chow, C. Y. Chen, and S. H. Chen, “Enhancement of signal performance in LED visible light communications using mobile phone camera,” IEEE Photonics J. 7(5), 7903607 (2015).
[Crossref]

Opt. Express (6)

Opt. Lett. (1)

Other (2)

J. Shi, Y. Hong, J. He, R. Deng, and L.-K. Chen, “Experimental demonstration of OQAM-OFDM based MIMO-NOMA over visible light communications,” in Optical Fiber Communication Conference (OFC 2018), paper M2K.3.
[Crossref]

J. Shi, Y. Wang, X. Huang, and N. Chi, “Enabling mobility in LED based two nodes VLC network employing self-adaptive STBC,” in Optical Fiber Communication Conference (OFC 2018), paper Th2A.23.
[Crossref]

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Figures (6)

Fig. 1
Fig. 1 The scenario of mobile OCC system with user mobility.
Fig. 2
Fig. 2 Experimental setup of mobile OCC using mobile phone. The insets are the structure of data packet (left) and the photo of experimental setup (right).
Fig. 3
Fig. 3 System process diagram of OCC system using mobile phone camera. Grayscale values (a) after column selection, (b) after LPF, (c) after histogram equalization, and (d) using thresholding scheme.
Fig. 4
Fig. 4 Flowchart of dynamic CMS for mobile OCC system. (a), (b) and (c) are the image frames, respectively corresponding to different cases on the flowchart. The column matrix of grayscale values (d) using dynamic CMS algorithm, and (e) using fixed CMS scheme.
Fig. 5
Fig. 5 The BER performance and the illuminance versus the offset to center of the track.
Fig. 6
Fig. 6 The BER versus the moving speed at the lateral distance of (a) 50 cm and (b) 70 cm.

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