Beam forming method

US7096041B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Christopher Brunner · Sunnyvale, US
• Martin Haardt · Hersbruck, DE
• Joachim S. Hammerschmidt · Mountain View, US
• Alexander Seeger · Straubing, DE

Key dates

• Filing date: May 17, 2001
• Grant date: Aug 22, 2006
• Expiry date: Jun 14, 2022

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B7/0617
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

In a radio communication system, a beam is formed between subscriber stations and a base station which has an antenna device with several antenna elements. The antenna elements emit a downlink signal based on respective weighing with coefficients of a weighting vector. A plurality of weighting vectors are determined at the subscriber station in an initialization phase and transmitted to the base station. In a subsequent working phase, the subscriber station selects a dominant weighting vector from the weighting vectors and transmits a designation of the selected weighting vector to the base station.