Optical Power Distributions for 4×4 MIMO Visible Light Communications in Indoor Environment
Subject Areas : Communication Systems & Deviceslwaa abdulameer 1 , Ahmed Hassan 2 , Aliaa T. Obeed 3 , Aya N. Dahir 4
1 - University of Baghdad
2 - University of Baghdad
3 - University of Baghdad
4 - University of Baghdad
Keywords: MIMO, SISO, VLC, Optical, Indoor, Power Distribution,
Abstract :
Visible Light Communication (VLC) has emerged as a powerful technique for wireless communication systems. Providing high data rate and increasing capacity are the major problems in VLC. Recent evidence suggests that Multiple Input Multiple Output (MIMO) technique can offers improved data rates and increased link range. This paper describes the design and implementation of visible light communication system in indoor environment exploring the benefits of MIMO. The specific objective of this research was to implement a 4×4 Multiple Input (LEDs) Multiple Output (photodetectors)-VLC communication system, where a 16 white power LEDs in four arrays are setting up at transmitter and four RX modules are setting up at receiver side without the need for additional power or bandwidth as well as analyze a mathematical model for a VLC- 4×4 MIMO with different modes such as the suitable angles to cover the entire room. The research designs practically an electronic circuit for the transmitter and receiver with inexpensive components. The power distribution of different propagation modes is calculated for Single Input Single Output (SISO) and MIMO channels in typical room dimensions. The results in this paper indicate that the power is distributed uniformly for entire room when implemented VLC-MIMO as compared to VLC-SISO. Furthermore, a 4×4 MIMO implementing VLC is compared in term of BER vs. SINR with SISO communication system for both Line of Sight (LOS) and Non Line of Sight (NLOS) propagation modes. Comparing the two results of LOS and NLOS, it can be seen that a 4×4 MIMO implementing VLC for LOS perform better than the same system with NLOS due to decreasing in the received power resulted from the multipath effect.
[1] D. Karunatilaka, F. Zafar, V. Kalavally and R. Parthiban, "LED Based Indoor Visible Light Communications: State of the Art", IEEE Communications Surveys & Tutorials, vol. 17, no. 3, pp. 1649-1678, 2015. Available: 10.1109/comst.2015.2417576.
[2] A. Jovicic, J. Li and T. Richardson, "Visible light communication: opportunities, challenges and the path to market", IEEE Communications Magazine, vol. 51, no. 12, pp. 26-32, 2013. Available: 10.1109/mcom.2013.6685754.
[3] M. Chowdhury, M. Hossan, A. Islam and Y. Jang, "A Comparative Survey of Optical Wireless Technologies: Architectures and Applications", IEEE Access, vol. 6, pp. 9819-9840, 2018. Available: 10.1109/access.2018.2792419.
[4] S. Bawazir, P. Sofotasios, S. Muhaidat, Y. Al-Hammadi and G. Karagiannidis, "Multiple Access for Visible Light Communications: Research Challenges and Future Trends", IEEE Access, vol. 6, pp. 26167-26174, 2018. Available: 10.1109/access.2018.2832088.
[5] T. Komine and M. Nakagawa, "Fundamental analysis for visible-light communication system using LED lights", IEEE Transactions on Consumer Electronics, vol. 50, no. 1, pp. 100-107, 2004. Available: 10.1109/tce.2004.1277847.
[6] T. Fath and H. Haas, "Performance Comparison of MIMO Techniques for Optical Wireless Communications in Indoor Environments", IEEE Transactions on Communications, vol. 61, no. 2, pp. 733-742, 2013. Available: 10.1109/tcomm.2012.120512.110578.
[7] Y. Zhang, H. Yu and J. Zhang, "Block Precoding for Peak-Limited MISO Broadcast VLC: Constellation-Optimal Structure and Addition-Unique Designs", IEEE Journal on Selected Areas in Communications, vol. 36, no. 1, pp. 78-90, 2018. Available: 10.1109/jsac.2017.2774480.
[8] M. Uysal, C. Capsoni, Z. Ghassemlooy, A. Boucouvalas and E. Udvary, Optical Wireless Communications. Switzerland: springer, 2016, pp. 107-122.
[9] A. Agarwal and S. Mohammed, "Achievable Rate Region of the Zero-Forcing Precoder in a $2\times 2$ MU-MISO Broadcast VLC Channel With Per-LED Peak Power Constraint and Dimming Control", Journal of Lightwave Technology, vol. 35, no. 19, pp. 4168-4194, 2017. Available: 10.1109/jlt.2017.2719920.
[10] Y. Zhang, "Intrinsic Robustness of MISO Visible Light Communications: Partial CSIT Can be as Useful as Perfect One", IEEE Transactions on Communications, vol. 67, no. 2, pp. 1297-1312, 2019. Available: 10.1109/tcomm.2018.2874988.
[11] C. Chen, W. Zhong and D. Wu, "On the Coverage of Multiple-Input Multiple-Output Visible Light Communications [Invited]", Journal of Optical Communications and Networking, vol. 9, no. 9, p. D31, 2017. Available: 10.1364/jocn.9.000d31.
[12] S. Nandkeolyar, R. Mohanty and V. Dash, "Management of Time-Flexible Demand to Provide Power System Frequency Response", in IEEE International Conference on Technologies for Smart-City Energy Security and Power, Bhubaneswar, India, 2018, pp. 28-30.
[13] A. Nuwanpriya, S. Ho and C. Chen, "Indoor MIMO Visible Light Communications: Novel Angle Diversity Receivers for Mobile Users", IEEE Journal on Selected Areas in Communications, vol. 33, no. 9, pp. 1780-1792, 2015. Available: 10.1109/jsac.2015.2432514.
[14] A. Alwarafy, M. Alresheedi, A. Abas and A. Alsanie, "Performance Evaluation of Space Time Coding Techniques for Indoor Visible Light Communication Systems", in 2018 International Conference on Optical Network Design and Modeling (ONDM), Dublin, Ireland, 2018, pp. 88-93.
[15] Z. Wang, S. Han and N. Chi, "Performance enhancement based on machine learning scheme for space multiplexing 2×2 MIMO VLC system employing joint IQ independent component analysis", Optics Communications, vol. 458, p. 124733, 2019. Available: 10.1016/j.optcom.2019.124733.
[16] J. Ye, G. Pan, Y. Xie, Q. Feng, Q. Ni, and Z. Ding, "On Indoor Visible Light Communication Systems with Spatially Random Receiver", Optics Communications, Vol. 431,2019 , pp. 29-38.
[17] K. K. Wong, R. D. Murch, and K. Ben Letaief, “Performance enhancement of multiuser MIMO wireless communication systems,” IEEE Trans. Commun., vol. 50, no. 12, pp. 1960–1970, 2002, doi: 10.1109/TCOMM.2002.806503.
[18] P. Fahamuel, J. Thompson, and H. Haas, "Improved indoor VLC MIMO channel capacity using mobile receiver with angular diversity detectors"In 2014 IEEE Global Communications Conference. IEEE, Austin, TX, USA,8-12 Dec.2014, p.2060-2065.
