A Survey of Channel Measurements and Models for Current and Future Railway Communication Systems

2017 11th European Conference on Antennas and Propagation (EUCAP)

Sand

Soliman

et al. 2017

Self Cite

Within the next decades the railway systems will change to fully autonomous high speed trains (HSTs). An increase in efficiency and safety and a reduction of costs would go hand in hand. Today's centralized railway management system and established regulations can not cope with trains driving within the absolute braking distance as it would be necessary for electronic coupling or platooning maneuvers. Hence, to ensure safety and reliability, new applications and changes in the train control and management are necessary. Such changes demand new reliable control communication links between train-to-train (T2T) and future developments on train-to-ground (T2G). T2G will be covered by long term evolution-railway (LTE-R) which shall replace today's global system for mobile communications-railway (GSM-R). The decentralized T2T communication is hardly investigated and no technology has been selected. This publication focuses on the wide band propagation for T2T scenarios and describes a extensive channel sounding measurement campaign with two HSTs. First results of T2T communication at high speed conditions in different environments are presented. Index Terms-train-to-train, high speed train, propagation, measurement.

Section: Environmental Aspects For High Speed Railwaymentioning

confidence: 99%

“…To fill up the gaps pointed out in [2] a comprehensive HST channel sounding measurement campaign was performed. The campaign was split in two parts.…”

Section: Measurement Campaignmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Wide band propagation in train-to-train scenarios — Measurement campaign and first results

2017 11th European Conference on Antennas and Propagation (EUCAP)

Sand

Soliman

et al. 2017

Self Cite

“…For design and testing, channel models are essential but hardly investigated for T2T. An overview of measurements and channel models is given in [1]. To characterize the propagation effects between two moving trains for frequencies above 1 GHz and large bandwidths, a T2T channel sounding measurement campaign was performed.…”

Section: Introductionmentioning

confidence: 99%

Measurement Based Spatial Characteristics of MPCs in Train-to-Train Propagation

12th European Conference on Antennas and Propagation (EuCAP 2018)

Jost

Wang

et al. 2018

Railway operators for high speed trains, commuter trains or subways request for technologies to increase the density and efficiency on their rails. One of those future technologies is virtual coupling based on train-to-train (T2T) wireless communication links. For the design of a wireless communication system, the knowledge of wave propagation is crucial. To characterize the propagation effects between two moving trains a T2T channel sounding measurement campaign was performed. To post-process the data, we use the Kalman enhanced super resolution tracking (KEST) algorithm to detect and track multipath components (MPCs). Using the single-input single-output measurement data recorded while the transmitter and receiver were in motion, the complex amplitude, the delay and the life time of individual MPCs can be estimated. First results of the post-processing step, the geometrical representation of MPCs using point scatterers and possibilities to identify scattering positions are presented in this paper. Index Terms-train-to-train, high speed train, propagation, measurement, KEST, path tracking.

“…The low latency requirement could be met by T2T communications. In [4] a survey on T2T communication research is given and gaps are pointed out. In comparison to T2G, T2T is hardly investigated and therefore wideband channel sounding measurements and models are missing.…”

Section: Introductionmentioning

confidence: 99%

Localization of Scatterers in Railway Environments for Train-to-Train Propagation

2018 IEEE 88th Vehicular Technology Conference (VTC-Fall)

Walter

Kürner

2018

Self Cite

Wireless communication became a key technology in the transportation domain. An increase of efficiency and safety can be achieved by connecting all traffic participants. In the railway domain wireless communication could enable new applications. In this contribution we focus on train-totrain (T2T) communication and investigate the propagation conditions. In typical railway environments different types of objects along the track highly influence the propagation channel and, in turn, the performance of wireless T2T communications. Therefore, the characterization and modeling of the propagation effects are indispensable. In comparison to cellular or vehicle-tovehicle communication, T2T propagation is hardly investigated. In this paper we present how key parameters of the multipath components (MPCs) of the channel impulse response can be estimated. The estimation is based on measurement data. We estimate delay and Doppler of single-bounce MPCs and estimate the location of the corresponding scatterers.