Path Loss Characterization in an Indoor Laboratory Environment at 3.7 GHz in Line-Of-Sight Condition

Abstract

The objective of this work is to propose experimental path loss propagation models for communication channels in indoor environments. In this sense, an experimental path loss characterization has been achieved, according to the measurements campaign carried out in a typical scenario of a university campus. These narrowband measurements were collected in the laboratory environment at 3.7 GHz in line-of-sight (LOS) condition. Also, these measurements were carried out at night to simulate stationary channel conditions. Thus, the results obtained show the values of the parameters of the close-in (CI) free space reference distance and floating-intercept (FI) path loss models, in terms of the transmitter and receiver separation distance. It should be noted that these values of the path loss models have been extracted applying linear regression techniques to the measured data. Also, these values agree with the path loss exponent values presented by other researchers in similar scenarios. The path loss behavior can be described with the implementation of these models. However, more measurement campaigns are needed to improve the understanding of propagation channel features, as well as to obtain better precision in the results obtained. This, in order to optimize the deployment and performance of next fifth-generation (5G) networks that combine indoor environments to offer their services and applications.

Keywords

5G, channel characterization, channel measurements, channel models, indoor environments, path loss exponent

Author Biography

Sandy Enrique Avella-Cely

Roles: Methodology, Validation, Formal analysis, Investigation.

Juan Carlos Muñoz-Pérez, M.Sc.

Roles: Methodology, Validation, Formal analysis, Investigation.

Herman Antonio Fernández-González, Ph. D.

Roles: Conceptualization, Methodology, Validation, Formal analysis, Investigation, Supervision, Writing–original draft, Writing–review & editing.

Lorenzo Rubio-Arjona, Ph. D.

Roles: Conceptualization, Methodology, Validation, Formal analysis, Investigation, Supervision, Writing–original draft, Writing–review & editing.

Juan Ribera Reig-Pascual, Ph. D.

Roles: Conceptualization, Methodology, Formal analysis, Investigation.

Vicent Miguel Rodrigo-Peñarrocha, Ph. D.

Roles: Conceptualization, Methodology, Formal analysis, Investigation.

References

[1] J. G. Andrews, S. Buzzi, W. Choi, S.V. Hanly, A. Lozano, A. C. K. Soong, J. C. Zhang, "What will 5G be?," IEEE Journal on selected areas in communications, vol. 32 (6), pp. 1065-1082, 2014. https://doi.org/10.1109/jsac.2014.2328098

[2] B. Ai, K. Guan, R. He, J. Li, G. Li, D. He, Z. Zhong, K. M. S. Huq, "On Indoor Millimeter Wave Massive MIMO Channels: Measurement and Simulation," IEEE Journal on Selected Areas in Communications, vol. 35 (7), pp. 1678-1690, Jul. 2017. https://doi.org/10.1109/jsac.2017.2698780

[3] J. Zhang, P. Tang, L. Tian, Z. Hu, T. Wang, H. Wang, "6–100 GHz research progress and challenges from a channel perspective for fifth generation (5G) and future wireless communication," Science China Information Sciences, vol. 60 (8), e080301, 2017. https://doi.org/10.1007/s11432-016-9144-x

[4] C. X. Wang, F. Haider, X. Gao, X. H. You, Y. Yang, D. Yuan, H. M. Aggoune, H. Haas, S. Fletcher, E. Hepsaydir, "Cellular Architecture and Key Technologies for 5G Wireless Communication Networks," IEEE Communications Magazine, vol. 52 (2), pp. 122-130, Feb. 2014. https://doi.org/10.1109/mcom.2014.6736752

[5] C. X. Wang, J. Bian, J. Sun, W. S. Zhang, M. G. Zhang, "A Survey of 5G Channel Measurements and Models," IEEE Communications Surveys and Tutorials, vol. 20 (4), pp. 3142-3168, 2018. https://doi.org/10.1109/comst.2018.2862141

[6] L. Rubio, J. Reig, H. Fernández, "Propagation aspects in vehicular networks," Vehicular Technologies: Increasing Connectivity, chap. 21, pp. 376-414, 2011. https://doi.org/10.5772/15650

[7] International Telecommunication Union, Guidelines for evaluation of radio interface technologies for IMT-2020, 2017. https://www.itu.int/dms_pub/itu-r/opb/rep/R-REP-M.2412-2017-PDF-E.pdf

[8] D. P. He, B. Ai, K. Guan, L. H. Wang, Z. D. Zhong, T. Kurner, "The Design and Applications of High-Performance Ray-Tracing Simulation Platform for 5G and Beyond Wireless Communications: A Tutorial," IEEE Communications Surveys and Tutorials, vol. 21 (1), pp. 10-27, 2019. https://doi.org/10.1109/comst.2018.2865724

[9] Federal Communications Commission, The FCC's 5G FAST Plan, 2019. https://www.fcc.gov/5G

[10] European Commision-Radio Spectrum Policy Group, Strategic Roadmap Towards 5G for Europe, 2016. https://rspg-spectrum.eu/wp-content/uploads/2013/05/RPSG16-032-Opinion_5G.pdf

[11] B. Halvarsson, A. Simonsson, A. Elgcrona, R. Chana, P. Machado, H. Asplund, "5G NR testbed 3.5 GHz coverage results," in IEEE 87th Vehicular Technology Conference, 2018, pp. 1-5. https://doi.org/10.1109/vtcspring.2018.8417704

[12] A. M. Al-Samman, T. A. Rahman, T. A. Hadhrami, A. Daho, M. N. Hindia, M. H. Azmi, K. Dimyati, M. Alazab, "Comparative Study of Indoor Propagation Model Below and Above 6 GHz for 5G Wireless Networks," Electronics, vol. 8 (1), e44, Jan. 2019. https://doi.org/10.3390/electronics8010044

[13] P. Kyosti, "WINNER II channel models," IST, Tech. Rep. IST-4-027756 WINNER II D1. 1.2 V1. 2, 2007.

[14] T. S. Rappaport, Y. C. Xing, G. R. MacCartney, A. F. Molisch, E. Mellios, J. H. Zhang, "Overview of Millimeter Wave Communications for Fifth-Generation (5G) Wireless Networks-With a Focus on Propagation Models," IEEE Transactions on Antennas and Propagation, vol. 65 (12), pp. 6213-6230, Dec. 2017. https://doi.org/10.1109/tap.2017.2734243

[15] L. Rubio, R. P. Torres, V. M. R. Peñarrocha, J. R. Pérez, H. Fernandez, J. M. M. G. Pardo, J. Reig, "Contribution to the Channel Path Loss and Time-Dispersion Characterization in an Office Environment at 26 GHz," Electronics, vol. 8 (11), e1261, Nov. 2019. https://doi.org/10.3390/electronics8111261

[16] T. S. Rappaport, R. W. Heath Jr, R. C. Daniels, J. N. Murdock, Millimeter wave wireless communications. Pearson Education, 2015.

[17] G. R. MacCartney, T. S. Rappaport, S. Sun, S. Deng, "Indoor Office Wideband Millimeter-Wave Propagation Measurements and Channel Models at 28 and 73 GHz for Ultra-Dense 5G Wireless Networks," IEEE Access, vol. 3, pp. 2388-2424, 2015. https://doi.org/10.1109/access.2015.2486778

[18] A. Sreedevi, T. R. Rao, M. Susila, "Device-to-Device Radio Link Analysis at 2.4, 3.4, 5.2, 28 and 60 GHz in Indoor Communication Environments," Frequenz, vol. 73 (3-4), pp. 131-141, 2019. https://doi.org/10.1515/freq-2018-0158

[19] X. Zhou, Z. Zhong, X. Blan, R. He, R Sun, K. Guan, K. Liu, X. Guo, "Measurement and Analysis of Channel Characteristics in Reflective Environments at 3.6 GHz and 14.6 GHz," Applied Sciences-Basel, vol. 7 (2), e165, Feb. 2017. https://doi.org/10.3390/app7020165