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CLOSE-RANGE DIRECTION OF ARRIVAL ESTIMATION IN THE PRESENCE OF CLOCK JITTER

Jansson, Andreas LU orcid and Jakobsson, Andreas LU orcid (2024) 49th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2024 In ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings p.8671-8675
Abstract

Many forms of small-size radars suffer from minor clock oscillations due to crystalline impurities in their internal clocks, causing time-varying clock offsets between the transmitter and the receivers. This offset causes a bias and an increased variance in the positioning of close-range targets, limiting the achievable accuracy well beyond the expected estimation limitations. This performance is further limited by the commonly used approximative model ignoring the curvature of the impinging wavefront. This is done to allow for computationally efficient estimators, but notably reduces the performance for close-range reflectors. In this paper, we introduce a computationally efficient and robust direction of arrival estimator that partly... (More)

Many forms of small-size radars suffer from minor clock oscillations due to crystalline impurities in their internal clocks, causing time-varying clock offsets between the transmitter and the receivers. This offset causes a bias and an increased variance in the positioning of close-range targets, limiting the achievable accuracy well beyond the expected estimation limitations. This performance is further limited by the commonly used approximative model ignoring the curvature of the impinging wavefront. This is done to allow for computationally efficient estimators, but notably reduces the performance for close-range reflectors. In this paper, we introduce a computationally efficient and robust direction of arrival estimator that partly allows for these model mismatches, significantly improving the estimation performance for close-range reflectors as compared to traditional estimators.

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Please use this url to cite or link to this publication:
author
and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
clock uncertainties, direction of arrival estimation, Near-field close-range radar
host publication
2024 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2024 - Proceedings
series title
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
pages
5 pages
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
conference name
49th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2024
conference location
Seoul, Korea, Republic of
conference dates
2024-04-14 - 2024-04-19
external identifiers
  • scopus:85195410558
ISSN
1520-6149
ISBN
9798350344851
DOI
10.1109/ICASSP48485.2024.10447534
language
English
LU publication?
yes
id
73956e13-d465-46fa-b20a-908dea72bfae
date added to LUP
2024-09-30 10:30:56
date last changed
2025-04-04 14:37:40
@inproceedings{73956e13-d465-46fa-b20a-908dea72bfae,
  abstract     = {{<p>Many forms of small-size radars suffer from minor clock oscillations due to crystalline impurities in their internal clocks, causing time-varying clock offsets between the transmitter and the receivers. This offset causes a bias and an increased variance in the positioning of close-range targets, limiting the achievable accuracy well beyond the expected estimation limitations. This performance is further limited by the commonly used approximative model ignoring the curvature of the impinging wavefront. This is done to allow for computationally efficient estimators, but notably reduces the performance for close-range reflectors. In this paper, we introduce a computationally efficient and robust direction of arrival estimator that partly allows for these model mismatches, significantly improving the estimation performance for close-range reflectors as compared to traditional estimators.</p>}},
  author       = {{Jansson, Andreas and Jakobsson, Andreas}},
  booktitle    = {{2024 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2024 - Proceedings}},
  isbn         = {{9798350344851}},
  issn         = {{1520-6149}},
  keywords     = {{clock uncertainties; direction of arrival estimation; Near-field close-range radar}},
  language     = {{eng}},
  pages        = {{8671--8675}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  series       = {{ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings}},
  title        = {{CLOSE-RANGE DIRECTION OF ARRIVAL ESTIMATION IN THE PRESENCE OF CLOCK JITTER}},
  url          = {{http://dx.doi.org/10.1109/ICASSP48485.2024.10447534}},
  doi          = {{10.1109/ICASSP48485.2024.10447534}},
  year         = {{2024}},
}