Frequency-signal processing method

US6587073B2 · kind B2 · utility

Assignee

• KROHNE Messtechnik GmbH & Co. KG · DE

Inventors

• Burkhard Schiek · Bochum, DE
• Thomas Much · Bad Hersfeld, DE
• Michael Küppers · Essen, DE
• Uwe Wegemann · Sprockhövel, DE
• Detlef Brumbi · Moers, DE

Key dates

• Filing date: Apr 19, 2002
• Grant date: Jul 1, 2003
• Expiry date: Apr 19, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S7/4818
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for the processing of a frequency signal especially for utilization in the evaluation of a distance measurement by means of pulsed electromagnetic waves or of frequency-modulated continuous waves on the basis of the radar principle. The frequency signal is divided into at least two frequency ranges corresponding to two main components of the frequency signal, the frequency signal in each of the two frequency ranges is then subjected to a separate Fourier transform, the Fourier transform applied to the frequency signal in the first frequency range resulting in a corresponding first complex time signal and the Fourier transform applied to the frequency signal in the other frequency range resulting in a second complex time signal. The second time signal is complex-divided by the first time signal which produces a third time signal, and the third time signal is then subjected to a Fourier transfer, the result being a processed frequency signal.