Patent ID: 11936446
Assignee: SONY GROUP CORPORATION
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. The electronic device of claim 1, wherein the processing circuit is further configured to:
transmit first reference signals to the plurality of terminal devices;
estimate long-term channel state information based on first reference signal feedbacks received from the plurality of terminal devices;
based on the long-term channel state information, calculate:
a precoding matrix to be used for communication for the one linear precoding terminal device group, and
a long-term group-specific precoding matrix for each non-linear precoding terminal device group of the one or more non-linear precoding terminal device groups;

transmit, to terminals assigned to each non-linear precoding terminal device group of the one or more non-linear precoding terminal device groups, second reference signals that are precoded with long time group-specific precoding matrices;
estimate, based on second reference signal feedbacks received from the terminals assigned to each non-linear precoding terminal device group of the one or more non-linear precoding terminal device groups, group-specific channel information for each non-linear precoding terminal device group of the one or more non-linear precoding terminal device groups, the group-specific channel information comprising at least one of instantaneous channel state information or interference channel information; and
based on the estimated group-specific channel information, set a group-specific precoding matrix to be used for communication for each non-linear precoding terminal device group of the one or more non-linear precoding terminal device groups.