Impact of Array Configuration on Head-Mounted Display Performance at mm Wave Bands
(2023) 2023 Joint European Conference on Networks and Communications and 6G Summit, EuCNC/6G Summit 2023 p.192-197- Abstract
Immersing a user in life-like extended reality (XR) scenery using a head-mounted display (HMD) with a constrained form factor and hardware complexity requires remote rendering on a nearby edge server or computer. Millimeter-wave (mmWave) communication technology can provide sufficient data rate for wireless XR content transmission. However, mmWave channels exhibit severe sparsity in the angular domain. This means that distributed antenna arrays are required to cover a larger angular area and to combat outage during HMD rotation. At the same time, one would prefer fewer antenna elements/arrays for a lower complexity system. Therefore, it is important to evaluate the trade-off between the number of antenna arrays and the achievable... (More)
Immersing a user in life-like extended reality (XR) scenery using a head-mounted display (HMD) with a constrained form factor and hardware complexity requires remote rendering on a nearby edge server or computer. Millimeter-wave (mmWave) communication technology can provide sufficient data rate for wireless XR content transmission. However, mmWave channels exhibit severe sparsity in the angular domain. This means that distributed antenna arrays are required to cover a larger angular area and to combat outage during HMD rotation. At the same time, one would prefer fewer antenna elements/arrays for a lower complexity system. Therefore, it is important to evaluate the trade-off between the number of antenna arrays and the achievable performance to find a proper practical solution. This work presents indoor 28 GHz mmWave channel measurement data, collected during HMD mobility, and studies the dominant eigenmode (DE) gain. DE gain is a significant factor in under-standing system performance since mm Wave channel sparsity and eigenmode imbalance often results in provisioning the majority of the available power to the DE. Moreover, it provides the upper performance bounds for widely-adopted analog beamformers. We propose 3 performance metrics - gain trade-off, gain volatility, and minimum service trade-off - for evaluating the performance of a multi-array HMD and apply the metrics to indoor 28 GHz channel measurement data. Evaluation results indicate, that 3 arrays provide stable temporal channel gain. Adding a 4th array further increases channel capacity, while any additional arrays do not significantly increase physical layer performance.
(Less)
- author
- Marinsek, Alexander ; Cai, Xuesong LU ; De Strycker, Lieven ; Tufvesson, Fredrik LU and Van Der Perre, Liesbet LU
- organization
- publishing date
- 2023
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- antenna configuration, channel measurements, Extended reality, millimeter-wave, wireless
- host publication
- 2023 Joint European Conference on Networks and Communications and 6G Summit, EuCNC/6G Summit 2023
- pages
- 6 pages
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- conference name
- 2023 Joint European Conference on Networks and Communications and 6G Summit, EuCNC/6G Summit 2023
- conference location
- Gothenburg, Sweden
- conference dates
- 2023-06-06 - 2023-06-09
- external identifiers
-
- scopus:85168407882
- ISBN
- 9798350311020
- DOI
- 10.1109/EuCNC/6GSummit58263.2023.10188332
- language
- English
- LU publication?
- yes
- id
- 2bbaf573-813b-4869-9f10-09e2d3d15d38
- date added to LUP
- 2023-11-13 14:45:50
- date last changed
- 2023-11-21 10:02:45
@inproceedings{2bbaf573-813b-4869-9f10-09e2d3d15d38, abstract = {{<p>Immersing a user in life-like extended reality (XR) scenery using a head-mounted display (HMD) with a constrained form factor and hardware complexity requires remote rendering on a nearby edge server or computer. Millimeter-wave (mmWave) communication technology can provide sufficient data rate for wireless XR content transmission. However, mmWave channels exhibit severe sparsity in the angular domain. This means that distributed antenna arrays are required to cover a larger angular area and to combat outage during HMD rotation. At the same time, one would prefer fewer antenna elements/arrays for a lower complexity system. Therefore, it is important to evaluate the trade-off between the number of antenna arrays and the achievable performance to find a proper practical solution. This work presents indoor 28 GHz mmWave channel measurement data, collected during HMD mobility, and studies the dominant eigenmode (DE) gain. DE gain is a significant factor in under-standing system performance since mm Wave channel sparsity and eigenmode imbalance often results in provisioning the majority of the available power to the DE. Moreover, it provides the upper performance bounds for widely-adopted analog beamformers. We propose 3 performance metrics - gain trade-off, gain volatility, and minimum service trade-off - for evaluating the performance of a multi-array HMD and apply the metrics to indoor 28 GHz channel measurement data. Evaluation results indicate, that 3 arrays provide stable temporal channel gain. Adding a 4th array further increases channel capacity, while any additional arrays do not significantly increase physical layer performance.</p>}}, author = {{Marinsek, Alexander and Cai, Xuesong and De Strycker, Lieven and Tufvesson, Fredrik and Van Der Perre, Liesbet}}, booktitle = {{2023 Joint European Conference on Networks and Communications and 6G Summit, EuCNC/6G Summit 2023}}, isbn = {{9798350311020}}, keywords = {{antenna configuration; channel measurements; Extended reality; millimeter-wave; wireless}}, language = {{eng}}, pages = {{192--197}}, publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}}, title = {{Impact of Array Configuration on Head-Mounted Display Performance at mm Wave Bands}}, url = {{http://dx.doi.org/10.1109/EuCNC/6GSummit58263.2023.10188332}}, doi = {{10.1109/EuCNC/6GSummit58263.2023.10188332}}, year = {{2023}}, }