Patent · US Active

Communications system using beamforming

US8660196B2 · kind B2 · utility

5Cited by

4References

14Claims

0Family size

Assignee

SONY GROUP CORPORATION · JP

Inventors

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

Key dates

Filing date	Oct 22, 2012
Grant date	Feb 25, 2014
Priority date	—
Expiry date	Oct 22, 2032

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.