Indoor Small-Scale Spatiotemporal Propagation Characteristics at Multiple Millimeter-Wave Bands

Zhang, Peize; Li, Jing; Wang, Hongbo; Wang, Haiming; Wang, Hong

doi:10.1109/lawp.2018.2872051

Cited by 38 publications

(15 citation statements)

References 12 publications

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“…This has prompted several propagation studies across the world to derive path loss models for the envisaged deployment scenarios and to estimate wideband channel parameters such as r.m.s . delay spread to aid in the design of 5G networks (Keusgen et al, ; mmMagic Deliverable 2.2, ; Raimundo et al, ; Sun et al, ; Zhang et al, ; Zhang et al, ). Due to the spread across multiple bands with different bandwidths and the need to characterize the radio channel in these new bands in preparations for WRC 2019, a number of correspondence groups were formed in three of the working parties of Study Group 3 (SG3) of the International Telecommunications Union (ITU) which provides recommendations on radio wave propagation.…”

Section: Introductionmentioning

confidence: 99%

Radio propagation measurements and modeling for standardization of the site general path loss model in International Telecommunications Union recommendations for 5G wireless networks

et al. 2020

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The International Telecommunications Union Radiocommunication Sector (ITU-R) StudyGroup 3 identified the need for a number of radio channel models in anticipation of the World Radiocommunications Conference in 2019 when the frequency allocation for 5G will be discussed. In response to the call for propagation path loss models, members of the study group carried out measurements in the frequency bands between 0.8 GHz up to 73 GHz in urban low-rise and urban high-rise as well as suburban environments. The data were subsequently merged to generate site general path loss models. The paper presents an overview of the radio channel measurements, the measured environments, the data analysis, and the approach for the derivation of the path loss model adopted in Recommendation ITU-R P.1411-10 (2019-08). Plain Language SummaryWireless communication networks require the estimation of the attenuation suffered by radio signals as they propagate between the transmitter and receiver in different environments. The International Telecommunications Union recommendation sector (ITU-R) provides models that can be used by network planners to guide the installation of base stations. The paper presents an overview of the model adopted in the recommendation ITU-R, P. 1411-10.

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Section: Introductionmentioning

confidence: 99%

Radio propagation measurements and modeling for standardization of the site general path loss model in International Telecommunications Union recommendations for 5G wireless networks

et al. 2020

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“…Recently, there have been multiple studies on indoor broadband channel measurements in two 5G mmWave bands, i.e., 28 GHz [14][15][16] and 39 GHz [17,18], mainly focusing on the characterization of propagation channels in several unique environments such as conference rooms, cubicle offices, corridors, and entrance halls. In-building measurement results show that the path loss exponents (PLEs) are generally smaller than the theoretical free space PLE of 2 under the line-of-sight (LoS) condition with vertical-to-vertical (V-V) polarimetric combination [15,17] due to the existence of rich multipath components (MPCs) reflected or diffracted from physical objects in the concerned environments [18,19]. However, conventional indoor path loss models for NLoS links, fitted via field measurement data using synthesized omnidirectional antennas, usually consider blocking effects as a part of shadow fading with larger PLEs [5,20].…”

Section: Introductionmentioning

confidence: 99%

“…The measurement-based path loss and space-time channel models across different frequencies and bandwidths in indoor environment are derived. In contrast to the analysis in [14][15][16][17][18], the transition from shadow regions to totally blocked regions is studied in terms of directional and omnidirectional path loss, delay spread (DS), and azimuth angular spread of arrival and departure (ASA/ASD). The bandwidth dependency of channel parameters are discussed with a focus on the impulse dispersion of multipath channels.…”

Section: Introductionmentioning

confidence: 99%

In-building coverage of millimeter-wave wireless networks from channel measurement and modeling perspectives

Zhang

Yang

et al. 2020

Sci. China Inf. Sci.

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To progress cost-effective deployment of millimeter-wave (mmWave) wireless networks for indoor users, the prediction of indoor-to-indoor (I2I) and outdoor-to-indoor (O2I) coverage based on field measurement studies is of great interest to the future generation mobile communication system. First, measurements in I2I and O2I scenarios, which have advantages in terms of achieving a fair comparison of channel characteristics across different mmWave bands and bandwidths, are performed. Next, the developed dual-slope path loss model with a break-point distance is found to well fit omnidirectional and directional measured I2I data, especially at 39.5 GHz, revealing that the transition from lit or shadow regions to totally blocked regions is abrupt. Combined with space-time propagation characteristics, the indoor blockage effect on path loss and angular spread is investigated, therein being essential for the design of beam-steering and tracking algorithms. Double-directional measurement results show that most dominant paths arrive along the line-ofsight path, and only a few in-building reflections can be detected in higher frequency bands. Based on the joint analysis of channel measurement and modeling results, several mmWave network design and in-building coverage enhancement insights are presented.

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“…Only signals from one or two fixed zenith angles of arrival and departure (ZoA/ZoD) were measured due to the fact that traditional step-by-step DSS method is time-consuming to collect sufficient channel data. It is also important to note that some mmWave small-scale channel model parameters are frequency-dependent and environment-specific [22], [23], whereas only a handful of outdoor measurement activities focus on these effects with the same measurement configurations [17], [19].…”

Section: Introductionmentioning

confidence: 99%

Radio Propagation Measurements and Cluster-Based Analysis for 5G Millimeter-Wave Cellular Systems in Dense Urban Environments

Zhang¹,

Yang²,

Wang³

et al. 2020

Preprint

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Empirical channel modeling is necessary for the deployment of the fifth-generation (5G) millimeter-wave (mmWave) cellular system in actual environments. In this paper, cluster-based analyses of mmWave channel characteristics in two typical dense urban environments are performed. First, radio propagation measurement campaigns are conducted at two primary 5G bands of 28 GHz and 39 GHz in a central business district and a dense residential area. The custom-designed channel sounder supports high-efficiency directional scanning sounding, which helps to collect sufficient data for statistical channel modeling. Next, using an improved autoclustering algorithm, multipath clusters and their scattering sources are identified. Mapping results show that multiple reflections from exterior walls and diffraction over building corners or rooftops enhance the coverage for non-line-of-sight (NLoS) links and the influences of these propagation mechanisms are intuitively embodied as changes in the topologies of deployment environments. Finally, an appropriate measure for cluster-level channel characteristics is provided including cluster number, Ricean K-factor, root mean squared (RMS) delay spread, RMS angular spread, and their correlations. Comparisons of these parameters across two mmWave bands are also given. The measurement and modeling results shed light on a fully understanding of mmWave channels in dense urban environments across multiple bands.

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Indoor Small-Scale Spatiotemporal Propagation Characteristics at Multiple Millimeter-Wave Bands

Cited by 38 publications

References 12 publications

Radio propagation measurements and modeling for standardization of the site general path loss model in International Telecommunications Union recommendations for 5G wireless networks

Radio propagation measurements and modeling for standardization of the site general path loss model in International Telecommunications Union recommendations for 5G wireless networks

In-building coverage of millimeter-wave wireless networks from channel measurement and modeling perspectives

Radio Propagation Measurements and Cluster-Based Analysis for 5G Millimeter-Wave Cellular Systems in Dense Urban Environments

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