Adaptive nonlinear frequency domain filter with low phase loss

US4954732A · kind A · utility

Assignee

• Messerschmitt Bolkow Blohm GmbH · DE

Inventors

• Michael Surauer · Chieming, DE
• Helmut Bittner · Munich, DE

Key dates

• Filing date: Jul 28, 1988
• Grant date: Sep 4, 1990
• Expiry date: Jul 28, 2008

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03H2021/0074
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

A nonlinear frequency domain filter serving for the suppression of unwanted signals which are superposed on a wanted signal variable in a given frequency range. The frequency domain filter comprises linear transmission members and a dead-zone member. With the filter, the zero point of the dead-zone member, to which the input signal to be filtered is supplied, follows proportionally the output signal of a pass-band filter connected in parallel with the dead-zone member. Further, the output signal of the pass-band filter is added to the output signal of the dead-zone member.