Association of transmission configuration indicators and precoders in uplink transmissions

A base station for wireless communication, comprising:

• a memory;
• and
• one or more processors coupled to the memory, the memory and the one or more processors configured to:
• transmit downlink control information (DCI) that indicates a first transmission configuration indicator (TCI), a second TCI, and a precoding matrix for a user equipment (UE), the first TCI being associated with a first set of antenna indices of the precoding matrix and the second TCI being associated with a second set of antenna indices of the precoding matrix;
• and
• receive an uplink transmission from the UE based at least in part on the DCI.

A user equipment (UE) for wireless communication, comprising:

• a memory;
• and
• one or more processors coupled to the memory, the memory and the one or more processors configured to:
• receive downlink control information (DCI) that indicates a first beam and a second beam for a first set of antenna indices and a second set of antenna indices that identify sounding reference signal (SRS) antenna ports associated with multiple SRS resources of multiple SRS resource sets;
• and
• transmit an uplink transmission based at least in part on the DCI.

A base station for wireless communication, comprising:

• a memory;
• and
• one or more processors coupled to the memory, the memory and the one or more processors configured to:
• transmit, to a user equipment (UE), downlink control information (DCI) that indicates a first beam and a second beam for a first set of antenna indices and a second set of antenna indices that identify sounding reference signal (SRS) antenna ports associated with multiple SRS resources of multiple SRS resource sets;
• and
• receive an uplink transmission from the UE based at least in part on the DCI.