Measurements and Ray Tracing Simulations for Non-Line-of-Sight Millimeter-Wave Channels in a Confined Corridor Environment

Yue, Guangrong; Qiu, Hao; Guan, Ke; Yang, Lin; Lv, Qifu

doi:10.1109/access.2019.2924510

Cited by 17 publications

(9 citation statements)

References 38 publications

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“…Reference [16] investigated large scale fading characteristics such as path loss exponent (PLE), cross-polarization discrimination ratio (XPD), and shadowing factor at 45 GHz in three typical indoor environments. The non-line-of-sight (NLOS) channels in a confined in-building corridor in 41 GHz band were measured in [17]. In [18], the multipath dispersion characteristics of outdoor-to-indoor (O2I) propagation were presented in the angular and delay domains at 32 GHz.…”

Section: Introductionmentioning

confidence: 99%

Millimeter-Wave Propagation Measurement and Modeling in Indoor Corridor and Stairwell at 26 and 38 GHz

et al. 2021

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Accurate propagation characteristics are essential for future indoor millimeter-wave (mmWave) small cell network planning. This paper presents propagation measurements at 26 GHz and 38 GHz which are important candidate bands for fifth generation mmWave communication. Measurements are conducted in an indoor corridor, as well as a stairwell whose mmWave channel is seldom investigated before. In these measurements, an omnidirectional biconical antenna is used as transmitter and a steerable directional horn antenna is used as receiver. The directional and omnidirectional path loss exponents, shadow factors, cross-polarization discrimination ratios and root-mean-square delay spreads are analyzed for both line-of-sight and non-line-of-sight scenarios in both co-polarization and cross-polarization, and these characteristics are compared for different frequencies and environments. It is found obvious depolarization phenomenon in non-line-of-sight scenario for higher frequency. Compared to the corridor, the stairwell has larger path loss exponents and root-mean-square delay spreads, and the depolarization is also more evident in stairwell. The results in this paper are beneficial to building efficient and robust indoor mmWave communication systems.INDEX TERMS Millimeter-wave, indoor propagation, path loss, cross-polarization discrimination ratio, delay spread.

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Section: Introductionmentioning

confidence: 99%

Millimeter-Wave Propagation Measurement and Modeling in Indoor Corridor and Stairwell at 26 and 38 GHz

et al. 2021

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“…The radio wave coverage in the tunnel environment has been studied for a long time [1][2][3] , and it can be modeled and predicted by measurements or by physics-based methods. Several measurement works on radio wave coverage in confined spaces have been published [4][5][6] . In [5], the radio wave transmission in the millimeter-wave band of 41 GHz for non-line-of-sight scenarios in a confined building corridor environment is measured.…”

Section: Introductionmentioning

confidence: 99%

“…Several measurement works on radio wave coverage in confined spaces have been published [4][5][6] . In [5], the radio wave transmission in the millimeter-wave band of 41 GHz for non-line-of-sight scenarios in a confined building corridor environment is measured. The channel characteristics, including the path loss model, root-mean-square delay spread, multipath statistics, small-scale fading characteristics, power delay profile, and power levels received from different antenna locations, are analyzed in detail.…”

Section: Introductionmentioning

confidence: 99%

Optimized Scheme of Antenna Diversity for Radio Wave Coverage in Tunnel Environment

et al. 2020

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To suppress the deep fading of radio waves caused by the tunnel waveguide effect, this paper presents an optimized scheme for the spatial and polarization diversities of tunnel antennas. Through the correlation coefficient analysis of path loss curves obtained by antennas placed at different positions, the two antenna positions that generate path loss curves with the lowest correlation coefficient are found, and these two antennas are defined as a diversity antenna pair. Using this scheme, the spatial diversity properties of the transmitting antenna and receiving antenna, as well as the spatial-polarization combined diversity property of the transmitting antenna, are obtained. Furthermore, the impact of antenna polarization on the spatial diversity property is investigated. The performance of the proposed scheme for spatial and polarization diversities is evaluated in terms of the intensity and uniformity of the path loss. The simulation results illustrate that the proposed diversity optimization scheme can suppress the influence of the waveguide effect and achieve more uniform and flatter radio wave coverage in a tunnel environment.

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“…The modified-CI model offered the same PLE as FI model with less computational complexity. In [103], the propagation characteristic in a confined corridor with a corner was investigated with highly directional antennas at 41 GHz. The result from the study showed that the angle of the corridor corner can result in power loss.…”

Section: Indoor Room Hall and Hallway/corridormentioning

confidence: 99%

Survey of Millimeter-Wave Propagation Measurements and Models in Indoor Environments

et al. 2021

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The millimeter-wave (mmWave) is expected to deliver a huge bandwidth to address the future demands for higher data rate transmissions. However, one of the major challenges in the mmWave band is the increase in signal loss as the operating frequency increases. This has attracted several research interests both from academia and the industry for indoor and outdoor mmWave operations. This paper focuses on the works that have been carried out in the study of the mmWave channel measurement in indoor environments. A survey of the measurement techniques, prominent path loss models, analysis of path loss and delay spread for mmWave in different indoor environments is presented. This covers the mmWave frequencies from 28 GHz to 100 GHz that have been considered in the last two decades. In addition, the possible future trends for the mmWave indoor propagation studies and measurements have been discussed. These include the critical indoor environment, the roles of artificial intelligence, channel characterization for indoor devices, reconfigurable intelligent surfaces, and mmWave for 6G systems. This survey can help engineers and researchers to plan, design, and optimize reliable 5G wireless indoor networks. It will also motivate the researchers and engineering communities towards finding a better outcome in the future trends of the mmWave indoor wireless network for 6G systems and beyond.

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Measurements and Ray Tracing Simulations for Non-Line-of-Sight Millimeter-Wave Channels in a Confined Corridor Environment

Cited by 17 publications

References 38 publications

Millimeter-Wave Propagation Measurement and Modeling in Indoor Corridor and Stairwell at 26 and 38 GHz

Millimeter-Wave Propagation Measurement and Modeling in Indoor Corridor and Stairwell at 26 and 38 GHz

Optimized Scheme of Antenna Diversity for Radio Wave Coverage in Tunnel Environment

Survey of Millimeter-Wave Propagation Measurements and Models in Indoor Environments

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