Article

Algebraic Diagnostics for Instantaneous Frequency Estimators

2026-03-20

Abstract excerpt

<title>Abstract</title> <p>Tracking instantaneous frequency (IF) in multi-component signals, phase-locked loops (PLLs), and reduced-order power-system models is frequently undermined by severe numerical ill-conditioning near regime boundaries. Conventional time--frequency transforms and signal-space geometric invariants can become unreliable precisely where diagnostic certainty is most needed: when denominators a...

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Literature Corpus work: aa3af7a0-b01a-5d72-8635-31aba80231fc
DOI: 10.21203/rs.3.rs-9111596/v1

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