Patent · US Expired

Using beamforming and closed loop transmit diversity in a multi-beam antenna system

US7151951B2 · kind B2 · utility

16Cited by

14References

30Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Bo Göransson · Sollentuna, SE
Andrew Logothetis · Westlington, GB
Bo Hagerman · Stockholm, SE

Key dates

Filing date	Dec 23, 2002
Grant date	Dec 19, 2006
Priority date	—
Expiry date	Sep 13, 2023

Classification

Technology area (CPC H)Electricity
CPC primaryH04B7/0634
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

In controlling a multi-beam antenna system for downlink wireless communication, beamforming and closed loop transmit diversity signaling are combined. Each beam signal is adjusted at the transmitter based on feedback from a wireless mobile communication station such that the signals received at the wireless mobile communication station can be coherently combined.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.