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

US7840385B2 · kind B2 · utility

Assignee

• Rohde & Schwarz GmbH & Co. KG · DE

Inventors

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

Key dates

• Filing date: Dec 28, 2007
• Grant date: Nov 23, 2010
• Expiry date: Aug 30, 2028

Classification

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

Abstract

A system for the identification of sinusoidal interference signals from a noise signal is provided. The system includes a unit for the estimation (51, 52, . . . , 5NFFT) of an autocorrelation matrix ({circumflex over (R)}v) of a measured signal (x(t), x(μ·Δt)), composed from the sinusoidal interference signals (Ak·ej(ωt+φ), Ak·ej(ωμ·Δt+φ)) and the noise signal (w(t), w(μ·Δt)), a unit (81, 82, . . . , 8NFFT) for frequency estimation, and a unit (91, 92, . . . , 9NFFT) for power-level determination of the spectral lines associated with the sinusoidal interference signals (Ak·ej(ωt+φ), Ak·ej(ωμ·Δt+φ)) A Fast Fourier Transform filter bank (1) is additionally provided for the generation of several frequency bands (v) for the measured signal (x(t), x(μ·Δt)), composed of the sinusoidal interference signals (Ak·ej(ωt+φ), Ak·ej(ωμ·Δt+φ)) and the noise signal (w(t), w(μ·Δt)).