Delay Spread and Electromagnetic Reverberation in Subway Tunnels and Stations

Zhang, Lei; Briso-Rodríguez, César; Fernandez, J. R. O.; Alonso, J.I.; Rodríguez, Carlos; García-Loygorri, Juan Moreno; Guan, Ke

doi:10.1109/lawp.2015.2462022

Cited by 25 publications

(13 citation statements)

References 10 publications

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“…The commonly quantified RMS delay spread is the square root of the second central moment of the PDP and is presented in (4), which can be used to extract the number of channel taps [40].…”

Section: Analysis Of Time Dispersionmentioning

confidence: 99%

Broadband Wireless Channel in Composite High-Speed Railway Scenario: Measurements, Simulation, and Analysis

Ding

Zhang

Yang

et al. 2017

Wireless Communications and Mobile Computing

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The rapid development of high-speed railway (HSR) and train-ground communications with high reliability, safety, and capacity promotes the evolution of railway dedicated mobile communication systems from Global System for Mobile CommunicationsRailway (GSM-R) to Long Term Evolution-Railway (LTE-R). The main challenges for LTE-R network planning are the rapidly timevarying channel and high mobility, because HSR lines consist of a variety of complex terrains, especially the composite scenarios where tunnels, cuttings, and viaducts are connected together within a short distance. Existing researches mainly focus on the path loss and delay spread for the individual HSR scenarios. In this paper, the broadband measurements are performed using a channel sounder at 950 MHz and 2150 MHz in a typical HSR composite scenario. Based on the measurements, the pivotal characteristics are analyzed for path loss exponent, power delay profile, and tap delay line model. Then, the deterministic channel model in which the 3D ray-tracing algorithm is applied in the composite scenario is presented and validated by the measurement data. Based on the ray-tracing simulations, statistical analysis of channel characteristics in delay and Doppler domain is carried out for the HSR composite scenario. The research results can be useful for radio interface design and optimization of LTE-R system.

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“…The commonly quantified RMS delay spread is the square root of the second central moment of the PDP and is presented in (4), which can be used to extract the number of channel taps [40].…”

Section: Analysis Of Time Dispersionmentioning

confidence: 99%

Broadband Wireless Channel in Composite High-Speed Railway Scenario: Measurements, Simulation, and Analysis

Ding

Zhang

Yang

et al. 2017

Wireless Communications and Mobile Computing

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“…Previous simulations focused on the single-input singleoutput (SISO) system and MIMO channel for indoor and outdoor communication [15][16][17], but they missed the research of multipath parameters such as spatial correlation in the railway system. As a result, there is still an urgent demand for a complete investigation by considering large-scale parameters, small-scale parameters, and spatial parameters [18,19] for station scenario in MIMO systems.…”

Section: Introductionmentioning

confidence: 99%

Channel Characteristics of High-Speed Railway Station Based on Ray-Tracing Simulation at 5G mmWave Band

Xiong

Miao

et al. 2019

International Journal of Antennas and Propagation

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In order to satisfy the increasing demand for the higher transmission capacity of "smart station", millimeter wave (mmWave) technology is expected to play a significant role in the high data rate communication system. Based on the ray-tracing simulation technology, this paper would study wireless channel characteristics of the three-dimensional (3D) model of high-speed railway station at the mmWave band. Key parameters such as path loss exponent, shadow fading factor, delay spread, Rician K-factor, angular spread, power angle spectrum, and spatial correlation are extracted and investigated. ese channel characteristics are of value for the selection of antenna arrays and even the design of future 5G communication networks in the railway environment.

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“…In addition, the delay spread decreases as the distance increases, highlighting that higher modes extinguish faster than the lower ones. In [17], a comparison of propagation at 980 MHz and 2.45 GHz in a subway tunnel was presented, indicating that the use of higher frequency can considerably reduce the multipath effect.…”

Section: Introductionmentioning

confidence: 99%

Uhf Wave Propagation in Mine Shaft Environment

Xue¹,

Tan²,

Shi³

2018

PIER M

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Wireless communication is very valuable in underground mines, in which channel characterization plays an important role. In this paper, both narrowband and wideband measurements at three typical ultra-high frequencies of 433, 900 and 2400 MHz in a real mine shaft are performed. To our knowledge, this is the first work focusing on radio propagation in the mine shaft environment. Important channel characteristics, such as the path loss, delay spread and the number of multipath components were extracted from the measured data and compared with that in tunnel channels. The effects of frequency and antenna position on the path loss were investigated. The relationship between the root-mean-square (RMS) delay spread and the transmitter-receiver distance was also analyzed. The results will deepen our understanding of the mine shaft channel and help to design shaft wireless systems.

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Delay Spread and Electromagnetic Reverberation in Subway Tunnels and Stations

Cited by 25 publications

References 10 publications

Broadband Wireless Channel in Composite High-Speed Railway Scenario: Measurements, Simulation, and Analysis

Broadband Wireless Channel in Composite High-Speed Railway Scenario: Measurements, Simulation, and Analysis

Channel Characteristics of High-Speed Railway Station Based on Ray-Tracing Simulation at 5G mmWave Band

Uhf Wave Propagation in Mine Shaft Environment

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