Patent · US Active

Beamforming methods and apparatuses

US8981993B2 · kind B2 · utility

3Cited by

4References

22Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Sven Petersson · Svenstavik, SE
Bjorn Johannisson · Kungsbacka, SE

Key dates

Filing date	Apr 27, 2011
Grant date	Mar 17, 2015
Priority date	—
Expiry date	Jan 15, 2034

Classification

Technology area (CPC H)Electricity
CPC primaryH04B7/10
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

A method is provided for using an antenna array to create two beams (a first beam and a second beam). In one aspect, the method uses dual polarization beam forming, which allows for many degrees of freedom in designing a desired power pattern. The method is well suited for systems with multiple radio chains (e.g., systems with active antennas). The method is also well suited for multi-port systems such as TD-SCDMA. In some embodiments, the method produces two beams where(a) the shape of the power beam pattern for the first beam and the shape of the power beam pattern for the second beam are the same (or substantially the same) in a plurality of directions of interest and (b) the beams have orthogonal (or substantially orthogonal) polarizations in the coverage area.

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