Interference detection in a wireless communication system

US7792224B2 · kind B2 · utility

Assignee

• Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

• Michael Meixner · Haslach im Kinzigtal, DE
• Mathias Pauli · Koblenzer Straße, DE
• Mats Hogberg · Partille, SE

Key dates

• Filing date: Feb 11, 2003
• Grant date: Sep 7, 2010
• Expiry date: Apr 14, 2026

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B1/1027
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A receiver and a method are applied in a wireless communication system for detecting interference with a coexisting radar system. A signal received from an antenna is fed through an analog part and a subsequent digital part of said receiver. The receiver has an element with a-priori known attenuation values for a predefined set of frequencies, a first branch-off element for deriving a first detection signal from the signal before the element and a second branch-off element for deriving a second detection signal from the signal after the element. The receiver processes the first and the second detection signal such that a difference between the first and second detection signal is comparable with a threshold value, where the threshold value depends on the a-priori known attenuation values of the element. Depending on the comparison result, a frequency is identified as interfering or not a co-existing radar system.