Method and system for the detection and/or removal of sinusoidal interference signals in a noise signal

US7957940B2 · kind B2 · utility

Assignee

• Rohde & Schwarz GmbH & Co. KG · DE

Inventors

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

Key dates

• Filing date: Apr 27, 2009
• Grant date: Jun 7, 2011
• Expiry date: Jul 22, 2029

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B1/1027
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for removing sinusoidal interference signals from a noise signal. The method includes transforming a measured signal (x(t), x(μ·Δt)), which is composed of a limited number of sinusoidal interference signals (Ak·ej(ωt+φ), Ak·ej(ωμ·Δt+φ)) and a white noise signal (w(t), w(μ·Δt)), into a subspace containing noise components and a subspace containing interference-signal components, and forming the spectrum of only the noise signal using the subspace containing the noise components. The entire frequency range is split into several frequency bands (ν), in which each measured signal (x(t), x(μ·Δt)) consists of a limited number (p(ν)) of sinusoidal interference signals and a white noise signal.