Patent · US Active

Antenna device

US8665994B2 · kind B2 · utility

4Cited by

5References

14Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Henrik Asplund · Stockholm, SE
Bo Göransson · Sollentuna, SE
Fredrik Ovesjö · Stuvsta-Snättringe, SE
Markus Ringström · Stockholm, SE

Key dates

Filing date	Dec 15, 2009
Grant date	Mar 4, 2014
Priority date	—
Expiry date	May 21, 2030

Classification

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

Abstract

The invention relates to the technical field of radio communications, and in particular to an antenna device for a radio base station, and a method for precoding data in a Multiple-Input Multiple-Output (MIMO) system. Embodiments of the invention disclose a secondary precoder 24 in series with a multiple-input multiple-output precoder 22. The secondary precoder 24 has a plurality of inputs 34, 36 and a plurality of outputs 38, 40. The second plurality of inputs being in communication with each plurality of outputs 38, 40 such that one or more signals input to a respective one or more of the second plurality of inputs 34, 36 provides a substantially equal power of signals at the second plurality of outputs 38, 40.

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