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

US7840384B2 · 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: Nov 23, 2010
• Expiry date: Jun 23, 2028

Classification

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

Abstract

A method and a system for the detection and/or removal of sinusoidal interference signals in/from a noise signal transforms a measured signal (x(t), x(μ·Δt)) composed of a limited number of sinusoidal interference signals (Ak·ej(ωt+φ), Ak·ej(μ·ωΔt+φ)) and a white noise signal (w(t), w(μ·Δt)) into a subspace containing its white noise components and a subspace containing its interference signal components. Following this, the individual sinusoidal interference signals (Ak·ej(ωt+φ), Ak·ej(μ·ωΔt+φ)) are determined using an estimation method within the subspace containing the noise components. The entire frequency range is split into several frequency bands (ν), in which the measured signal (x(t), x(μ·Δt)) consists of a limited number (p(ν)) of sinusoidal interference signals (Ak·ej(ωt+φ), Ak·ej(μ·ωΔt+φ)) and a white noise signal (w(t), w(μ·Δt)).