Multipath Delay Estimation in Complex Environments using Transformer

Ott J, Stahlke M, Kram S, Feigl T, Mutschler C (2023)

Publication Language: English

Publication Type: Conference contribution, Original article

Publication year: 2023

Pages Range: 1-6

Conference Proceedings Title: Proc. 13th International Conference on Indoor Positioning and Indoor Navigation (IPIN 2023)

Event location: Nuremberg, Germany DE

DOI: 10.1109/IPIN57070.2023.10332470

Abstract

Modern radio frequency based positioning systems exploit multipath propagation to achieve accurate and robust positioning at a minimum effort in infrastructure. A key concept is exploitation of multipath component (MPC) delays from channel measurements, which have a direct relation to the geometry of the environment. This is a challenging task given complex multipath-rich environments and limited bandwidths. However, downstream tasks suffer from false or missed detections, which is why reliable MPC detection and delay estimation is crucial. We propose an MPC delay estimation pipeline based on a Transformer (TF) neural network, which implicitly estimates the number and delays of the MPCs. We achieve subsample accuracy without using computational expensive super-resolution techniques. Our approach outperforms state-of-the art on detection and delay estimation of MPCs on different bandwidths. We also show that our approach can easily be fine-tuned on real world data with very few labeled data samples, making it a well-suited candidate for real world deployments.

Authors with CRIS profile

Maximilian Stahlke Machine Learning and Data Analytics Lab Sebastian Kram
Tobias Feigl Lehrstuhl für Informatik 2 (Programmiersysteme) Christopher Mutschler Lehrstuhl für Informatik 14 (Machine Learning and Data Analytics)

Involved external institutions

Fraunhofer-Institut für Integrierte Schaltungen (IIS) DE Germany (DE)

How to cite

APA:

Ott, J., Stahlke, M., Kram, S., Feigl, T., & Mutschler, C. (2023). Multipath Delay Estimation in Complex Environments using Transformer. In Proc. 13th International Conference on Indoor Positioning and Indoor Navigation (IPIN 2023) (pp. 1-6). Nuremberg, Germany, DE.

MLA:

Ott, Jonathan, et al. "Multipath Delay Estimation in Complex Environments using Transformer." Proceedings of the 13th International Conference on Indoor Positioning and Indoor Navigation (IPIN), Nuremberg, Germany 2023. 1-6.

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