Signaling design for type ii csi-rs spatial domain and frequency domain basis configuration

A method for wireless communications at a network device, comprising:

• transmitting, to a user equipment (UE), downlink control information indicating at least a portion of a frequency domain basis vector being applied by the network device for frequency domain precoding of a reference signal scheduled for transmission via a plurality of antenna ports;
• transmitting, to the UE, the reference signal that is frequency domain precoded in accordance with the at least the portion of the frequency domain basis vector via the plurality of antenna ports;
• and
• receiving, from the UE, a report indicating an antenna port subset of the plurality of antenna ports and a precoding coefficient for each antenna port of the antenna port subset.

An apparatus for wireless communications at a user equipment (UE), comprising:

• a memory;
• a transceiver;
• and
• a processor coupled with the memory and the transceiver, the processor configured to
• receive, from a network device, downlink control information indicating at least a portion of a frequency domain basis vector being applied by the network device for frequency domain precoding of a reference signal scheduled for transmission via a plurality of antenna ports;
• receive, from the network device, the reference signal that is frequency domain precoded in accordance with the at least the portion of the frequency domain basis vector via the plurality of antenna ports;
• and
• transmit, to the network device, a report indicating an antenna port subset of the plurality of antenna ports and a precoding coefficient for each antenna port of the antenna port subset.

An apparatus for wireless communications at a network device, comprising:

• a memory;
• and
• a processor coupled with the memory, the processor configured to:
• transmit, to a user equipment (UE), downlink control information indicating at least a portion of a frequency domain basis vector being applied by the network device for frequency domain precoding of a reference signal scheduled for transmission via a plurality of antenna ports;
• transmit, to the UE, the reference signal that is frequency domain precoded in accordance with the at least the portion of the frequency domain basis vector via the plurality of antenna ports;
• and
• receive, from the UE, a report indicating an antenna port subset of the plurality of antenna ports and a precoding coefficient for each antenna port of the antenna port subset.

An apparatus for wireless communications at a user equipment (UE), comprising:

• means for receiving, from a network device, downlink control information indicating at least a portion of a frequency domain basis vector being applied by the network device for frequency domain precoding of a reference signal scheduled for transmission via a plurality of antenna ports;
• means for receiving, from the network device, the reference signal that is frequency domain precoded in accordance with the at least the portion of the frequency domain basis vector via the plurality of antenna ports;
• and
• means for transmitting, to the network device, a report indicating an antenna port subset of the plurality of antenna ports and a precoding coefficient for each antenna port of the antenna port subset.