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Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Empirical millimeter-wave wideband propagation characteristics of high-speed train environments

  • Park, Jae-Joon (Telecommunications and Media Research Laboratory, Electronics and Telecommunications Research Institute (ETRI)) ;
  • Lee, Juyul (Telecommunications and Media Research Laboratory, Electronics and Telecommunications Research Institute (ETRI)) ;
  • Kim, Kyung-Won (Telecommunications and Media Research Laboratory, Electronics and Telecommunications Research Institute (ETRI)) ;
  • Kwon, Heon-Kook (Telecommunications and Media Research Laboratory, Electronics and Telecommunications Research Institute (ETRI)) ;
  • Kim, Myung-Don (Telecommunications and Media Research Laboratory, Electronics and Telecommunications Research Institute (ETRI))
  • Received : 2020.06.10
  • Accepted : 2020.10.22
  • Published : 2021.06.01
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Abstract

Owing to the difficulties associated with conducting millimeter-wave (mmWave) field measurements, especially in high-speed train (HST) environments, most propagation channels for mmWave HST have been studied using methods based on simulation rather than measurement. In this study, considering a linear cell layout in which base stations are installed along a railway, measurements were performed at 28 GHz with a speed up to 170 km/h in two prevalent HST scenarios: viaduct and tunnel scenarios. By observing the channel impulse responses, we could identify single- and double-bounced multipath components (MPCs) caused by railway static structures such as overhead line equipment. These MPCs affect the delay spread and Doppler characteristics significantly. Moreover, we observed distinct path loss behaviors for the two scenarios, although both are considered line-of-sight (LoS) scenarios. In the tunnel scenario, the path loss exponent (PLE) is 1.3 owing to the waveguide effect, which indicates that the path loss is almost constant with respect to distance. However, the LoS PLE in the viaduct scenario is 2.46, which is slightly higher than the free-space loss.

Keywords

Acknowledgement

This work was supported by the Institute for Information & Communications Technology Promotion (IITP) grant funded by the Korean government (MSIT) [2017-0-00066, "Development of time-space based spectrum engineering technologies for the preemptive using of frequency"] [2017-0-01973, "(Korea-Japan) International collaboration of 5G mmWave based Wireless Channel Characteristic and Performance Evaluation in High Mobility Environments"].

References

  1. Recommendation ITU-R M.2083, IMT Vision - Framework and overall objectives of the future development of IMT for 2020 and beyond, 2015.
  2. Report ITU-R M.2412, Guidelines for evaluation of radio interface technologies for IMT-2020, 2017.
  3. 3GPP, Study on channel model for frequencies from 0.5 to 100 GHz (Release 14), Tech. Rep. TR 38.901 v14.0.0, 2017.
  4. P. Kyosti et al., WINNER II channel models, IST-WINNER II D1.1.2, 2007.
  5. 3GPP, NR; User Equipment (UE) radio transmission and reception; Part 2: Range 2 standalone, Tech. Rep. TS 38.101-2, 2020.
  6. C. X. Wang et al., Channel measurements and models for highspeed train communication systems: A survey, IEEE Commun. Surv. Tutor. 18 (2016), no. 2, 974-987. https://doi.org/10.1109/COMST.2015.2508442
  7. K. Guan et al., Semi-deterministic path-loss modeling for viaduct and cutting scenarios of high-speed railway, IEEE Antennas Wirel. Propag. Lett. 12 (2013), 789-792. https://doi.org/10.1109/LAWP.2013.2270947
  8. T. Zhou et al., Channel characterization in high-speed railway station environments at 1.89 GHz, Radio Sci. 50 (2015), 1176-1186. https://doi.org/10.1002/2015rs005793
  9. T. Dominguez-Bolano et al., Experimental characterization of LTE Wirel. links in high-speed trains, Wirel. Commun. Mob. Comput. 2017 (2017), 1-20. https://doi.org/10.1155/2017/5079130
  10. S.-D. Li et al., Channel measurements and modeling at 6 GHz in the tunnel environments for 5G wireless systems, Int. J. Antennas Propag. 2017 (2017).
  11. X. Wu et al., 28 GHz indoor channel measurements and modeling in laboratory environment using directional antennas, in Proc Eur. Conf. Antenna Propag. (EuCAP) (Lisbon, Portugal), Apr. 2015.
  12. S. Sun et al., Propagation path loss models for 5G urban micro-and macro-cellular scenarios, in Proc. IEEE Veh. Technol. Conf. (VTC Spring), (Nanjing, China), May 2016.
  13. J. Lee et al., Measurement-based propagation channel characteristics for millimeter-wave 5G giga communication systems, ETRI J. 38 (2016), no. 6, 1031-1041. https://doi.org/10.4218/etrij.16.2716.0050
  14. S. Hur et al., Proposal on millimeter-wave channel modeling for 5G cellular system, IEEE J. Sel. Top. Signal Process. 10 (2016), 454-469. https://doi.org/10.1109/JSTSP.2016.2527364
  15. D. He et al., Channel measurement, simulation, and analysis for high-speed railway communications in 5G millimeter-wave band, IEEE Trans. Intell. Trans. Syst. 19 (2017), 3144-3158. https://doi.org/10.1109/TITS.2017.2771559
  16. J. Kim et al., A comprehensive study on mmwave-based mobile hotspot network system for high-speed train communications, IEEE Trans. Veh. Technol. 68 (2018), 2087-2101. https://doi.org/10.1109/tvt.2018.2865700
  17. G. Yue et al., Millimeter-wave system for high-speed train communications between train and trackside: System design and channel measurements, IEEE Trans. Veh. Technol. 68 (2019), 11746-11761. https://doi.org/10.1109/tvt.2019.2919625
  18. D. He et al., Stochastic channel modeling for railway tunnel scenarios at 25 GHz, ETRI J. 40 (2018), 39-50. https://doi.org/10.4218/etrij.2017-0190
  19. K. E. Guan et al., Towards realistic high-speed train channels at 5G millimeter-wave band-part I: paradigm, significance analysis, and scenario reconstruction, IEEE Trans. Veh. Technol. 67 (2018), 9112-9128. https://doi.org/10.1109/tvt.2018.2865498
  20. J. J. Park et al., Millimeter wave vehicular blockage characteristics based on 28 ghz measurements, in Proc. Veh. Technol. Conf. (VTC-Fall), (Toronto, Canada), Sept. 2017, pp. 1-5.
  21. J. Kivinen et al., Wideband radio channel measurement system at 2 GHz, IEEE Trans. Instrum. Meas. 48 (1999), 39-44. https://doi.org/10.1109/19.755057
  22. M. Schmieder et al., Measurement and characterization of 28 GHz high-speed train backhaul channels in rural propagation scenarios, in Proc. Eur. Conf. Antennas Propag. (EuCAP 2018), (London, UK), Apr. 2018, pp. 1-5.
  23. L. Liu et al., Position-based modeling for wireless channel on high-speed railway under a viaduct at 2.35 GHz, IEEE J. Select. Areas Commun. 30 (2012), 834-845. https://doi.org/10.1109/JSAC.2012.120516
  24. J. Li et al., Radio channel measurements and analysis at 2.4/5GHz in subway tunnels, China Commun. 12 (2015), 36-45. https://doi.org/10.1109/CC.2015.7084382
  25. K. Guan et al., Measurements and analysis of large-scale fading characteristics in curved subway tunnels at 920 MHz, 2400 MHz, and 5705 MHz, IEEE Trans. Intell. Transport. Syst. 16 (2015), no. 5, 2393-2405. https://doi.org/10.1109/TITS.2015.2404851