RECEPTION OF WEAK RADIO FREQUENCY SIGNAL IN THE PRESENCE OF A STRONG INTERNAL RADIO FREQUENCY INTERFERER—DEVICE AND METHOD FOR COMPENSATION OF AN INTERNAL INTERFERING SIGNAL BY A SUPERPOSITION METHOD

US6510308B1 · kind B1 · utility

Assignee

• Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

• Harald Thomas · Koblenzer Straße, DE
• Walter Kodim · Koblenzer Straße, DE
• Roman Gloeckler · Lauf an der Pegnitz, DE
• Herbert Dingfelder

Key dates

• Filing date: Jul 31, 2000
• Grant date: Jan 21, 2003
• Expiry date: Sep 28, 2020

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B1/525
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

The invention compensates for any interference from a mobile communication unit to a positioning receiver unit in a multiple standard communication device with mobile communication and localization functionality. A first sub-unit receives input signals at a predetermined input level. A second sub-unit transmits output signals at an output level that is large compared to the input level of the first sub-unit. A branch-off unit branches off a part of the output signal before the antenna of the second sub-unit. An interference suppression unit receives the branch-off part of the output signal and derives an interference compensation signal therefrom through attenuation and subsequent phase shifting. The interference compensation signal is supplied to a superposition unit that also receives the input signal of the first sub-unit.