Method and system for noise measurement with combinable subroutines for the measurement, identification and removal of sinusoidal interference signals in a noise signal

US7885421B2 · kind B2 · utility

Assignee

• Rohde & Schwarz GmbH & Co. KG · DE

Inventors

• Gregor Feldhaus · Munich, DE
• Hagen Eckert · Mering, DE

Key dates

• Filing date: Jan 17, 2006
• Grant date: Feb 8, 2011
• Expiry date: Dec 11, 2029

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R29/26
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An approach is provided for measuring, identifying, and removing at least one sinusoidal interference signal (Ak·ej(ωt+φ), Ak·ej(μ·ωΔt+φ)) in a noise signal (w(t), w(μ·Δt)). A frequency range to be measured is split into a plurality of frequency bands (ν) via a Fast Fourier Transform (FFT) filter bank. For each of the frequency bands (ν), an autocorrelation matrix ({circumflex over (R)}ν) is determined, wherein parameters of the autocorrelation matrices ({circumflex over (R)}ν) are variably adjusted based on whether the at least one sinusoidal interference signal (Ak·ej(ωt+φ), Ak·ej(μ·ωΔt+φ)) is to be measured, identified, or removed and further based on at least one averaging. The autocorrelation matrices ({circumflex over (R)}ν) are jointly utilized for one or more of measuring, identifying, or removing the at least one sinusoidal interference signal (Ak·ej(ωt+φ), Ak·ej(μ·ωΔt+φ)) in the noise signal (w(t), w(μ·Δt)).