Patent · US Active

Communications system using beamforming

US9020049B2 · kind B2 · utility

71Cited by

0References

11Claims

0Family size

Assignee

SONY GROUP CORPORATION · JP

Inventors

Andreas Schwager · Stuttgart, DE
Lothar Stadelmeier · Stuttgart, DE
Daniel Schneider · Stuttgart, DE

Key dates

Filing date	Dec 29, 2010
Grant date	Apr 28, 2015
Priority date	—
Expiry date	Jan 17, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2025/03808
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

In a MIMO communications system a first communications device applies beamforming to a complete transmission packet including both synchronization data and either payload data or training symbols. A second communications device evaluates the beamformed synchronization data and determines and transmits a feedback information indicating minimum required synchronization data and/or a minimum number of training symbols. The first communications device tailors the synchronization data and/or number of training symbols on the basis of the feedback information. Beamforming the complete transmission packet facilitates signal suppression at defined locations. When the channel properties change, the second communications device may provide further channel state information to adapt beamforming in the first communications device without transmission of not beamformed training symbols. The communications system may be a powerline telecommunications system.

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