Change search
Link to record
Permanent link

Direct link
Zepernick, Hans-JuergenORCID iD iconorcid.org/0000-0003-3604-2766
Alternative names
Publications (10 of 287) Show all publications
Elwardy, M., Zepernick, H.-J., Hu, Y. & Chu, T. M. (2023). ACR360: A Dataset on Subjective 360° Video Quality Assessment Using ACR Methods. In: Wysocki B.J., Wysocki T.A. (Ed.), 2023 16th International Conference on Signal Processing and Communication System, ICSPCS 2023 - Proceedings: . Paper presented at 16th International Conference on Signal Processing and Communication System, ICSPCS 2023, Bydgoszcz, 6 Sept - 8 Sept 2023. Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>ACR360: A Dataset on Subjective 360° Video Quality Assessment Using ACR Methods
2023 (English)In: 2023 16th International Conference on Signal Processing and Communication System, ICSPCS 2023 - Proceedings / [ed] Wysocki B.J., Wysocki T.A., Institute of Electrical and Electronics Engineers (IEEE), 2023Conference paper, Published paper (Refereed)
Abstract [en]

The recent advances in immersive technologies have been essential in the development of a wide range of novel standalone and networked immersive media applications. The concepts of virtual reality, augmented reality, and mixed reality relate to different compositions of real and computer-generated virtual objects. In this context, 360° video streaming has become increasingly popular offering improved immersive experiences when viewed on a head-mounted display (HMD). An important component in the development of novel immersive media systems are subjective tests in which participants assess the quality of experience of representative test stimuli. In this paper, the annotated ACR360 dataset is presented which is publicly available on GitHub. The ACR360 dataset contains a wide range of psychophysical and psychophysiological data that was collected in Subjective tests on 360° video quality. The test stimuli were shown on an HMD and rated according to the absolute category rating (ACR) and modified ACR (MACR) methods. To support an easy exploration and utilization of the ACR360 dataset by the research community, its structure on GitHub is described and a comprehensive illustration of analysis options are provided for each data category. The ACR360 dataset may be used for conducting meta-analysis in combination with other datasets to improve precision and to pursue research questions that cannot be answered by an individual study. © 2023 IEEE.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2023
Keywords
360° video, absolute category rating, annotated dataset, Immersive media, quality assessment, Subjective test, Helmet mounted displays, Image quality, Mixed reality, Quality of service, Statistical tests, Subjective testing, Video streaming, Absolute category ratings, Annotated datasets, Head-mounted-displays, Immersive technologies, Media application, Video quality, Augmented reality
National Category
Telecommunications
Identifiers
urn:nbn:se:bth-25548 (URN)10.1109/ICSPCS58109.2023.10261151 (DOI)2-s2.0-85174510305 (Scopus ID)9798350333510 (ISBN)
Conference
16th International Conference on Signal Processing and Communication System, ICSPCS 2023, Bydgoszcz, 6 Sept - 8 Sept 2023
Funder
Knowledge Foundation, 20220068Knowledge Foundation, 20170056
Note

  

Available from: 2023-11-07 Created: 2023-11-07 Last updated: 2023-11-08Bibliographically approved
Chu, T. M., Zepernick, H.-J. & Duong, T. Q. (2023). Full-Duplex Cooperative NOMA Short-Packet Communications with K-Means Clustering. In: IEEE Workshop on Statistical Signal Processing Proceedings: . Paper presented at 22nd IEEE Statistical Signal Processing Workshop, SSP 2023, Hanoi,July 2-5, 2023. (pp. 576-580). IEEE Computer Society
Open this publication in new window or tab >>Full-Duplex Cooperative NOMA Short-Packet Communications with K-Means Clustering
2023 (English)In: IEEE Workshop on Statistical Signal Processing Proceedings, IEEE Computer Society, 2023, p. 576-580Conference paper, Published paper (Refereed)
Abstract [en]

Fifth-generation (5G) and future sixth-generation (6G) mobile networks aim at offering ultra-reliable, low-latency, and massive machine-type communications. In this context, this paper studies full-duplex (FD) cooperative non-orthogonal multiple access (C-NOMA) short-packet communications (SPC) with K-means clustering of user equipment regarding block error rate (BLER) and sum rate. Analytical expressions are derived for the BLER and sum rate allowing to assess the performance of the considered system. The numerical results reveal the benefits of the FD C-NOMA SPC system, illustrate trade-offs between BLER and sum rate, and show the impact of the transmit signal-to-noise ratio and number of channel uses on the performance. © 2023 IEEE.

Place, publisher, year, edition, pages
IEEE Computer Society, 2023
Series
IEEE Statistical Signal Processing Workshop (SSP), ISSN 2373-0803, E-ISSN 2693-3551
Keywords
cooperative NOMA, Full-duplex relaying, K-means clustering, short-packet communications, 5G mobile communication systems, Cooperative communication, Economic and social effects, Finite difference method, Signal to noise ratio, Block error rates, Full-duplex, K-means++ clustering, Multiple access, Non-orthogonal, Performance, Short packet communication, Sum-rate
National Category
Telecommunications
Identifiers
urn:nbn:se:bth-25406 (URN)10.1109/SSP53291.2023.10208051 (DOI)001051091700117 ()2-s2.0-85168910823 (Scopus ID)9781665452458 (ISBN)
Conference
22nd IEEE Statistical Signal Processing Workshop, SSP 2023, Hanoi,July 2-5, 2023.
Available from: 2023-09-20 Created: 2023-09-20 Last updated: 2023-10-26Bibliographically approved
Kelkkanen, V., Lindero, D., Fiedler, M. & Zepernick, H.-J. (2023). Hand-Controller Latency and Aiming Accuracy in 6-DOF VR. Advances in Human-Computer Interaction, Article ID 1563506.
Open this publication in new window or tab >>Hand-Controller Latency and Aiming Accuracy in 6-DOF VR
2023 (English)In: Advances in Human-Computer Interaction, ISSN 1687-5893, E-ISSN 1687-5907, article id 1563506Article in journal (Refereed) Published
Abstract [en]

All virtual reality (VR) systems have some inherent hand-controller latency even when operated locally. In remotely rendered VR, additional latency may be added due to the remote transmission of data, commonly conducted through shared low-capacity channels. Increased latency will negatively affect the performance of the human VR operator, but the level of detriment depends on the given task. This work quantifies the relations between aiming accuracy and hand-controller latency, virtual target speed, and the predictability of the target motion. The tested context involves a target that changes direction multiple times while moving in straight lines. The main conclusions are, given the tested context, first, that the predictability of target motion becomes significantly more important as latency and target speed increase. A significant difference in accuracy is generally observed at latencies beyond approximately 130 ms and at target speeds beyond approximately 3.5 degrees/s. Second, latency starts to significantly impact accuracy at roughly 90 ms and approximately 3.5 degrees/s if the target motion cannot be predicted. If it can, the numbers are approximately 130 ms and 12.7 degrees/s. Finally, reaction times are on average 190-200 ms when the target motion changes to a new and unpredictable direction.

Place, publisher, year, edition, pages
Hindawi Publishing Corporation, 2023
Keywords
Tracking, Robot, Artificial intelligence
National Category
Computer Sciences
Research subject
Computer Science
Identifiers
urn:nbn:se:bth-24387 (URN)10.1155/2023/1563506 (DOI)001077344100001 ()2-s2.0-85174505323 (Scopus ID)
Funder
Knowledge Foundation, 20170056Knowledge Foundation, 20220068
Available from: 2023-03-21 Created: 2023-03-21 Last updated: 2023-11-09Bibliographically approved
Sundstedt, V., Boeva, V., Zepernick, H.-J., Goswami, P., Cheddad, A., Tutschku, K., . . . Arlos, P. (2023). HINTS: Human-Centered Intelligent Realities. In: Håkan Grahn, Anton Borg and Martin Boldt (Ed.), 35th Annual Workshop of the Swedish Artificial Intelligence Society SAIS 2023: . Paper presented at 35th Annual Workshop of the Swedish Artificial Intelligence Society SAIS 2023, Karlskrona, June 12-13, 2023 (pp. 9-17). Linköping University Electronic Press
Open this publication in new window or tab >>HINTS: Human-Centered Intelligent Realities
Show others...
2023 (English)In: 35th Annual Workshop of the Swedish Artificial Intelligence Society SAIS 2023 / [ed] Håkan Grahn, Anton Borg and Martin Boldt, Linköping University Electronic Press, 2023, p. 9-17Conference paper, Published paper (Refereed)
Abstract [en]

During the last decade, we have witnessed a rapiddevelopment of extended reality (XR) technologies such asaugmented reality (AR) and virtual reality (VR). Further, therehave been tremendous advancements in artificial intelligence(AI) and machine learning (ML). These two trends will havea significant impact on future digital societies. The vision ofan immersive, ubiquitous, and intelligent virtual space opensup new opportunities for creating an enhanced digital world inwhich the users are at the center of the development process,so-calledintelligent realities(IRs).The “Human-Centered Intelligent Realities” (HINTS) profileproject will develop concepts, principles, methods, algorithms,and tools for human-centered IRs, thus leading the wayfor future immersive, user-aware, and intelligent interactivedigital environments. The HINTS project is centered aroundan ecosystem combining XR and communication paradigms toform novel intelligent digital systems.HINTS will provide users with new ways to understand,collaborate with, and control digital systems. These novelways will be based on visual and data-driven platforms whichenable tangible, immersive cognitive interactions within realand virtual realities. Thus, exploiting digital systems in a moreefficient, effective, engaging, and resource-aware condition.Moreover, the systems will be equipped with cognitive featuresbased on AI and ML, which allow users to engage with digitalrealities and data in novel forms. This paper describes theHINTS profile project and its initial results. ©2023, Copyright held by the authors   

Place, publisher, year, edition, pages
Linköping University Electronic Press, 2023
Series
Linköping Electronic Conference Proceedings, ISSN 1650-3686, E-ISSN 1650-3740 ; 199
National Category
Human Computer Interaction
Identifiers
urn:nbn:se:bth-25413 (URN)10.3384/ecp199001 (DOI)9789180752749 (ISBN)
Conference
35th Annual Workshop of the Swedish Artificial Intelligence Society SAIS 2023, Karlskrona, June 12-13, 2023
Funder
Knowledge Foundation, 20220068
Available from: 2023-09-22 Created: 2023-09-22 Last updated: 2023-12-28Bibliographically approved
Chu, T. M. & Zepernick, H.-J. (2023). Modulation and Detection for High Doppler Channels: An Overview on OTFS Modulation. Blekinge Tekniska Högskola
Open this publication in new window or tab >>Modulation and Detection for High Doppler Channels: An Overview on OTFS Modulation
2023 (English)Report (Other academic)
Place, publisher, year, edition, pages
Blekinge Tekniska Högskola, 2023
National Category
Signal Processing
Research subject
Applied Signal Processing
Identifiers
urn:nbn:se:bth-25285 (URN)
Projects
Directed Air Data Link
Funder
Vinnova, 2019-02769
Available from: 2023-08-17 Created: 2023-08-17 Last updated: 2023-08-22Bibliographically approved
Chu, T. M., Fiedler, M., Kelkkanen, V., Lindero, D. & Zepernick, H.-J. (2023). On the Perception of Frame Stalls in Remote VR for Task and Task-Free Subjective Tests. In: 2023 15th International Conference on Quality of Multimedia Experience, QoMEX 2023: . Paper presented at 15th International Conference on Quality of Multimedia Experience, QoMEX 2023, Ghent, 20-22 June 2023. (pp. 201-204). Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>On the Perception of Frame Stalls in Remote VR for Task and Task-Free Subjective Tests
Show others...
2023 (English)In: 2023 15th International Conference on Quality of Multimedia Experience, QoMEX 2023, Institute of Electrical and Electronics Engineers (IEEE), 2023, p. 201-204Conference paper, Published paper (Refereed)
Abstract [en]

The performance of remotely rendered Virtual Reality (VR) is sensitive to temporal disturbances in communication channels. An earlier Quality of Experience (QoE) study of temporal impacts in the form of frame stalls has revealed difficulties with subjective disturbance ratings while performing a task in an interactive 6-degrees-of-freedom (DOF) VR environment. This study follows up on above observation by comparing QoE ratings in the presence and absence of a task. The exploratory findings show that the task-free subjective tests yield lower ratings compared to the subjective tests with task. This indicates that the participants became more sensitive to temporal impairments in the absence of a task. Also, the positive impact of reprojection on the QoE ratings decreased in the task-free environment. The simulator sickness results for individual symptoms were on similar low levels in both settings. The total score (TS) of sickness severity was higher after than before the subjective tests with task while the difference between the TS before and after the task-free subjective tests was insignificant, © 2023 IEEE.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2023
Series
International Workshop on Quality of Multimedia Experience (QoMEX), ISSN 2372-7179, E-ISSN 2472-7814
Keywords
Diseases, Subjective testing, Virtual reality, 6 degree of freedom, Communications channels, Follow up, Performance, Re-projection, Simulator sickness, Quality of service
National Category
Computer Sciences Other Medical Sciences not elsewhere specified
Identifiers
urn:nbn:se:bth-25320 (URN)10.1109/QoMEX58391.2023.10178492 (DOI)001037196100040 ()2-s2.0-85167358478 (Scopus ID)9798350311730 (ISBN)
Conference
15th International Conference on Quality of Multimedia Experience, QoMEX 2023, Ghent, 20-22 June 2023.
Funder
Knowledge Foundation, 20170056Knowledge Foundation, 20220068
Available from: 2023-08-24 Created: 2023-08-24 Last updated: 2023-09-15Bibliographically approved
Chu, T. M., Zepernick, H.-J., Hook, A., Westerhagen, A. & Granbom, B. (2023). OTFS Modulation for Non-Terrestrial Networks: Concepts, Applications, Benefits, and Challenges. In: Wysocki B.J., Wysocki T.A. (Ed.), 2023 16th International Conference on Signal Processing and Communication System, ICSPCS 2023 - Proceedings: . Paper presented at 2023 16th International Conference on Signal Processing and Communication System, ICSPCS 2023, Bydgoszcz, 6 Sept - 8 Sept 2023. IEEE
Open this publication in new window or tab >>OTFS Modulation for Non-Terrestrial Networks: Concepts, Applications, Benefits, and Challenges
Show others...
2023 (English)In: 2023 16th International Conference on Signal Processing and Communication System, ICSPCS 2023 - Proceedings / [ed] Wysocki B.J., Wysocki T.A., IEEE, 2023Conference paper, Published paper (Refereed)
Abstract [en]

Fifth generation (5G), beyond 5G (B5G), and future sixth generation (6G) mobile networks are foreseen to increasingly account for heterogeneous networks toward ubiquitous communications with non-terrestrial networks (NTNs). Furthermore, in 5G mobile networks, massive machine type communications has been introduced for Internet of Things (IoT) applications aiming at low energy consumption, low to medium data rates, burst transmissions, and massive connectivity. It is expected that IoT communications will take an even larger portion in B5G and 6G mobile networks. Robust communications in such high-mobility NTN deployments including unmanned aerial vehicles (UAVs), airborne platforms, and satellite systems, need novel modulation waveforms that can deal with the induced severe Doppler effects. Orthogonal time frequency space (OTFS) modulation has gained tremendous interest in recent years as an effective technology for coping with high Doppler channels. OTFS essentially transforms a time-varying fading channel into a quasi-static channel in the delay-Doppler domain. In this paper, for the first time, an overview on OTFS modulation for NTNs is provided including basic concepts and applications in UAVs, airborne networks, and satellite systems. A case study related to an application in high Doppler airborne communication networks is also provided to illustrate the potential of OTFS modulation in providing robust transmission links in high-mobility scenarios. This survey will be helpful for researchers and practitioners to keep abreast about the potential of OTFS modulation in NTNs. © 2023 IEEE.

Place, publisher, year, edition, pages
IEEE, 2023
Keywords
5G mobile communication systems, Antennas, Communication satellites, Energy utilization, Fading channels, Internet of things, Low power electronics, Vehicle to vehicle communications, Wireless networks, Aerial vehicle, Benefit and challenges, Doppler, High mobility, Low energy consumption, Machinetype communication (MTC), Satellite system, Terrestrial networks, Time-frequency space, Ubiquitous communication, Heterogeneous networks
National Category
Communication Systems
Identifiers
urn:nbn:se:bth-25554 (URN)10.1109/ICSPCS58109.2023.10261131 (DOI)2-s2.0-85174530707 (Scopus ID)9798350333510 (ISBN)
Conference
2023 16th International Conference on Signal Processing and Communication System, ICSPCS 2023, Bydgoszcz, 6 Sept - 8 Sept 2023
Projects
Riktad luftdatalänk
Funder
Vinnova, 2019-02769
Available from: 2023-11-06 Created: 2023-11-06 Last updated: 2023-11-06Bibliographically approved
Nguyen, M.-H. T., Bui, T. T., Nguyen, L. D., Garcia-Palacios, E., Zepernick, H.-J. & Duong, T. Q. (2023). Real-Time Large-Scale 6G Satellite-UAV Networks. In: IEEE Workshop on Statistical Signal Processing Proceedings: . Paper presented at 22nd IEEE Statistical Signal Processing Workshop, SSP 2023, Hanoi, 2 July through 5 July 2023 (pp. 100-104). IEEE Computer Society
Open this publication in new window or tab >>Real-Time Large-Scale 6G Satellite-UAV Networks
Show others...
2023 (English)In: IEEE Workshop on Statistical Signal Processing Proceedings, IEEE Computer Society, 2023, p. 100-104Conference paper, Published paper (Refereed)
Abstract [en]

In this paper, we consider an Internet-of-Things network supported by several satellites and multiple cache-assisted unmanned aerial vehicles (UAVs). We propose an optimisation problem with the aim of minimising the total network latency. To reduce the complexity of the original problem, it is divided into three sub-problems, namely, clustering ground users associated with UAVs, cache placement in UAVs (to support the network in avoiding backhaul congestion), and power allocation for satellites and UAVs. A non-cooperative game is designed to obtain the solution to the clustering problem; a genetic algorithm, which is powerful in the scenario of many variables, is employed to obtain the optimal solution to the high-complexity caching problem; and a quick estimation technique is used for power allocation. The total network latency is then minimised by using alternating optimisation technique. Numerical results prove the efficiency of our methods compared to other traditional ones. © 2023 IEEE.

Place, publisher, year, edition, pages
IEEE Computer Society, 2023
Series
IEEE Statistical Signal Processing Workshop (SSP), ISSN 2373-0803, E-ISSN 2693-3551
Keywords
Antennas, Complex networks, Game theory, Numerical methods, Satellites, Unmanned aerial vehicles (UAV), Aerial vehicle, Cache placement, Clusterings, Large-scales, Network latencies, Optimization problems, Power allocations, Real- time, Sub-problems, Vehicle network, Genetic algorithms
National Category
Signal Processing
Identifiers
urn:nbn:se:bth-25358 (URN)10.1109/SSP53291.2023.10208078 (DOI)001051091700021 ()2-s2.0-85168913203 (Scopus ID)9781665452458 (ISBN)
Conference
22nd IEEE Statistical Signal Processing Workshop, SSP 2023, Hanoi, 2 July through 5 July 2023
Funder
EU, Horizon Europe, UKRI 10061165
Available from: 2023-09-08 Created: 2023-09-08 Last updated: 2023-10-26Bibliographically approved
Nguyen, M.-H. T., Bui, T. T., Nguyen, L. D., Garcia-Palacios, E., Zepernick, H.-J., Shin, H. & Duong, T. Q. (2023). Real-Time Optimized Clustering and Caching for 6G Satellite-UAV-Terrestrial Networks. IEEE transactions on intelligent transportation systems (Print)
Open this publication in new window or tab >>Real-Time Optimized Clustering and Caching for 6G Satellite-UAV-Terrestrial Networks
Show others...
2023 (English)In: IEEE transactions on intelligent transportation systems (Print), ISSN 1524-9050, E-ISSN 1558-0016Article in journal (Refereed) Epub ahead of print
Abstract [en]

In this paper, we consider an Internet-of-Things network supported by several satellites and multiple cache-assisted unmanned aerial vehicles (UAVs). Due to the long-distance transmission and detrimental effects from the transmission environment, the latency can be extremely high, especially in the presence of backhaul congestion. Therefore, we formulate an optimisation problem with the aim of minimising the total network latency. To reduce the complexity of the original problem, it is divided into three sub-problems, namely, clustering ground users associated with UAVs, cache placement in UAVs (to support the network in avoiding backhaul congestion), and power allocation for satellites and UAVs. We propose a distributed optimisation method consisting of: a non-cooperative game is designed to obtain the solution to the clustering problem; a genetic algorithm, which is powerful in the scenario of many variables, is employed to obtain the optimal solution to the high-complexity caching problem; and a quick estimation technique is used for power allocation. Additionally, a centralised optimisation method is presented as a benchmark. Simulation results show that although the distributed method leads to network latency of approximately 30% higher than the centralised method, it takes significantly less time to execute and is suitable for systems requiring strict real-time computing constraints. Furthermore, the numerical results prove the efficiency of our methods compared with other conventional ones. IEEE

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2023
Keywords
Autonomous aerial vehicles, caching, Complexity theory, game theory, genetic algorithm, Genetic algorithms, real-time optimization, Real-time systems, Resource management, Satellite broadcasting, Satellites, UAV-aided ISTN
National Category
Signal Processing
Identifiers
urn:nbn:se:bth-25228 (URN)10.1109/TITS.2023.3287279 (DOI)001025528800001 ()2-s2.0-85163536477 (Scopus ID)
Available from: 2023-08-07 Created: 2023-08-07 Last updated: 2023-08-08Bibliographically approved
Chu, T. M., Zepernick, H.-J. & Duong, T. Q. (2023). Short-Packet Cooperative NOMA Communications with K-Means User Clustering. In: 2023 IEEE International Conference on Communications Workshops: Sustainable Communications for Renaissance, ICC Workshops 2023: . Paper presented at 2023 IEEE International Conference on Communications Workshops: Sustainable Communications for Renaissance, ICC Workshops 2023, Rome, 28/5 -1/6 2023 (pp. 1794-1799). Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>Short-Packet Cooperative NOMA Communications with K-Means User Clustering
2023 (English)In: 2023 IEEE International Conference on Communications Workshops: Sustainable Communications for Renaissance, ICC Workshops 2023, Institute of Electrical and Electronics Engineers (IEEE), 2023, p. 1794-1799Conference paper, Published paper (Refereed)
Abstract [en]

Sixth-generation (6G) networks are considered as key enablers in the development of the intelligent information society offering ultra-reliable low-latency communications in the context of massive machine-type communications and the emergence of the Internet-of-everything. In this paper, we consider a short-packet cooperative nonorthogonal multiple access (C-NOMA) communication system that uses the K-means algorithm for user clustering. The short-packet component of the system facilitates low-latency communications. In addition, C-NOMA using decode-and-forward relays allows extended coverage in terms of user equipment (UE) clusters and spectral efficiency in terms of sum rate. Given the trend toward irregular deployment of heterogeneous infrastructure elements in 6G networks and massive amounts of UEs, the K-means algorithm is used to generate clusters of UEs around the locations of the relays that assist the communication between the base station and the UEs. Analytical expressions of the block error rate (BLER) and sum rate are derived allowing a performance assessment of the short-packet C-NOMA communication system. Numerical results are provided revealing the impact of the number of channel uses and the number of UEs on the BLER and sum rate of the considered system. © 2023 IEEE.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2023
Keywords
block error rate, cooperative NOMA, K-means algorithm, Short-packet communications, sum rate
National Category
Telecommunications
Identifiers
urn:nbn:se:bth-25693 (URN)10.1109/ICCWorkshops57953.2023.10283610 (DOI)2-s2.0-85177832083 (Scopus ID)9798350333077 (ISBN)
Conference
2023 IEEE International Conference on Communications Workshops: Sustainable Communications for Renaissance, ICC Workshops 2023, Rome, 28/5 -1/6 2023
Available from: 2023-12-08 Created: 2023-12-08 Last updated: 2023-12-08Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-3604-2766

Search in DiVA

Show all publications