Propagation Measurement System and Approach at 140 GHz-Moving to 6G and Above 100 GHz

Xing, Yunchou; Rappaport, Theodore S.

doi:10.1109/glocom.2018.8647921

Cited by 214 publications

(180 citation statements)

References 30 publications

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“…4 of [20]. The architectures of the channel sounder system used in the measurements given here have been extensively described in [1], [20], [21] and the specifications of the channel sounder system are summarized in Table I. The measured path loss at 142 GHz agrees well with Friis FSPL equation [22], indicating the high accuracy and proper calibration of the channel sounder system.…”

Section: Scattering and Reflection Measurements Atmentioning

confidence: 63%

“…142 GHz FSPL verification measurements were conducted at transmitter-toreceiver (TR) separation distances of 1, 2, 3, 4, and 5 m using the standard calibration and verification method taught in [19], and the results after subtracting out antenna gains were shown in Fig. 4 of [20]. The architectures of the channel sounder system used in the measurements given here have been extensively described in [1], [20], [21] and the specifications of the channel sounder system are summarized in Table I.…”

Section: Scattering and Reflection Measurements Atmentioning

confidence: 99%

“…LOSS MODEL AT 142 GHZ Wideband indoor propagation measurements at 142 GHz (see the specification of the 142 GHz channel sounder system in Table I) were conducted in a multipath-rich indoor environment at the 9th floor of 2 MetroTech Center using the exact same locations as used at previous 28 and 73 GHz [29], [30], which is a typical indoor environment including hallway, meeting rooms, cubical office, laboratory and open area [20]. The TX antenna were set at 2.5 m near the ceiling (2.7 m) to emulate current indoor wireless access points and the RX antennas were set at heights of 1.5 m which are typical heights of mobile devices.…”

Section: Indoor Propagation Measurements and Pathmentioning

confidence: 99%

See 2 more Smart Citations

Indoor Wireless Channel Properties at Millimeter Wave and Sub-Terahertz Frequencies

Xing¹,

Kanhere²,

Ju³

et al. 2019

2019 IEEE Global Communications Conference (GLOBECOM)

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100

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This paper provides indoor reflection, scattering, transmission, and large-scale path loss measurements and models, which describe the main propagation mechanisms at millimeter wave and Terahertz frequencies. Channel properties for common building materials (drywall and clear glass) are carefully studied at 28, 73, and 140 GHz using a wideband sliding correlation based channel sounder system with rotatable narrow-beam horn antennas. Reflection coefficient is shown to linearly increase as the incident angle increases, and lower reflection loss (e.g., stronger reflections) are observed as frequencies increase for a given incident angle. Although backscatter from drywall is present at 28, 73, and 140 GHz, smooth surfaces (like drywall) are shown to be modeled as a simple reflected surface, since the scattered power is 20 dB or more below the reflected power over the measured range of frequency and angles. Partition loss tends to increase with frequency, but the amount of loss is material dependent. Both clear glass and drywall are shown to induce a depolarizing effect, which becomes more prominent as frequency increases. Indoor propagation measurements and large-scale indoor path loss models at 140 GHz are provided, revealing similar path loss exponent and shadow fading as observed at 28 and 73 GHz. The measurements and models in this paper can be used for future wireless system design and other applications within buildings for frequencies above 100 GHz.

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Section: Scattering and Reflection Measurements Atmentioning

confidence: 63%

Section: Scattering and Reflection Measurements Atmentioning

confidence: 99%

Section: Indoor Propagation Measurements and Pathmentioning

confidence: 99%

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Indoor Wireless Channel Properties at Millimeter Wave and Sub-Terahertz Frequencies

Xing¹,

Kanhere²,

Ju³

et al. 2019

2019 IEEE Global Communications Conference (GLOBECOM)

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100

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“…The TXs for each RX are listed in Table II. Of these nine RX locations, the positioning error at RX 1,8,9,12,and 13 was less than 40 m, but not particularly good due to absence of true LOS environments at each RX.…”

Section: Rx Locationmentioning

confidence: 95%

Position Locationing for Millimeter Wave Systems

Kanhere¹,

Rappaport²

2018

2018 IEEE Global Communications Conference (GLOBECOM)

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The vast amount of spectrum available for millimeter wave (mmWave) wireless communication systems will support accurate real-time positioning concurrent with communication signaling. This paper demonstrates that accurate estimates of the position of an unknown node can be determined using estimates of time of arrival (ToA), angle of arrival (AoA), as well as data fusion or machine learning. Real-world data at 28 GHz and 73 GHz is used to show that AoA-based localization techniques will need to be augmented with other positioning techniques. The fusion of AoA-based positioning with received power measurements for RXs in an office which has dimensions of 35 m by 65.5 m is shown to provide location accuracies ranging from 16 cm to 3.25 m, indicating promise for accurate positioning capabilities in future networks. Received signal strength intensity (RSSI) based positioning techniques that exploit the ordering of the received power can be used to determine rough estimates of user position. Prediction of received signal characteristics is done using 2-D ray tracing.

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“…Thanks to the hundreds to thousands of antennas that are expected to be deployed at mmWave base stations (BS) [12], [13] , these BSs could also be used for mmWave imaging. Further, future communication systems 6G and beyond will likely utilize even higher frequency bands [14]. The higher bandwidth can be leveraged to provide even higher resolution images thus increasing the accuracy.…”

Section: Introductionmentioning

confidence: 99%

Leveraging mmWave Imaging and Communications for Simultaneous Localization and Mapping

Aladsani

Alkhateeb

Trichopoulos

2019

ICASSP 2019 - 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

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In this work, we propose a novel approach for high accuracy user localization by merging tools from both millimeter wave (mmWave) imaging and communications. The key idea of the proposed solution is to leverage mmWave imaging to construct a high-resolution 3D image of the line-of-sight (LOS) and non-line-of-sight (NLOS) objects in the environment at one antenna array. Then, uplink pilot signaling with the user is used to estimate the angle-of-arrival and time-of-arrival of the dominant channel paths. By projecting the AoA and ToA information on the 3D mmWave images of the environment, the proposed solution can locate the user with a sub-centimeter accuracy. This approach has several gains. First, it allows accurate simultaneous localization and mapping (SLAM) from a single standpoint, i.e., using only one antenna array. Second, it does not require any prior knowledge of the surrounding environment. Third, it can locate NLOS users, even if their signals experience more than one reflection and without requiring an antenna array at the user. The approach is evaluated using a hardware setup and its ability to provide sub-centimeter localization accuracy is shown.Index Terms-Millimeter wave communications, simultaneous localization and mapping, millimeter-wave imaging.

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Propagation Measurement System and Approach at 140 GHz-Moving to 6G and Above 100 GHz

Cited by 214 publications

References 30 publications

Indoor Wireless Channel Properties at Millimeter Wave and Sub-Terahertz Frequencies

Indoor Wireless Channel Properties at Millimeter Wave and Sub-Terahertz Frequencies

Position Locationing for Millimeter Wave Systems

Leveraging mmWave Imaging and Communications for Simultaneous Localization and Mapping

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