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Improving Magnetic Flux Density Fingerprint Map Matching by Mitigating AC-Induced Variability

Year: 2025

Type: conference-paper

Abstract: Magnetic flux density (MFD) map matching is a technique that can provide absolute position solutions by comparing a series of MFD measurements with a database. Map matching relies on the consistent measurement of the same physical phenomena during the surveying and positioning phases. However, fluctuations in MFD due to alternating current (AC) electricity, influenced by dynamic power requirements, pose a challenge. This paper analyses the characteristics of the influences of AC sources on MFD measurements. It shows that employing spectral filtering can isolate magnetic perturbations from AC sources, which could be used to enhance the magnetic map matching’s resilience to this form of temporal change.

Source: European Navigation Conference (ENC)

DOI: 10.3390/engproc2025088059

Authors: Peter J. Thompson, Paul D. Groves, Owen J. Griffiths, Robin J. Handley, David R. Selviah

Institutions: University College London, Defence Science and Technology Laboratory

Language: English

Topic: Magnetic Field Sensors Techniques

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Funders: Defence Science and Technology Laboratory, Engineering and Physical Sciences Research Council

OpenAlex ID: W4410520395

FWCI:

Cites: 18

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Related to: 10