Channel state information codebook enhancements

An apparatus for wireless communications, comprising:

• memory;
• and
• at least one processor of a network entity, the at least one processor coupled with the memory and configured to:
• transmit, to a user equipment (UE), a set of channel state information reference signals using a set of antenna ports;
• and
• receive, from the UE, a channel state information report generated at the UE in accordance with a codebook, wherein a size of a downlink channel matrix indicated by the channel state information report is based at least in part on a quantity of antenna ports that is included in the set of antenna ports used to transmit the set of channel state information reference signals, and wherein at least one parameter of the codebook is based at least in part on the quantity of antenna ports exceeding a threshold.

A method for wireless communications at a user equipment (UE), comprising:

• receiving, from a network entity, a set of channel state information reference signals from a set of antenna ports at the network entity;
• generating a channel state information report in accordance with a codebook, wherein a size of a downlink channel matrix estimated based on the set of channel state information reference signals and used to generate the channel state information report is based at least in part on a quantity of antenna ports that is included in the set of antenna ports, and wherein at least one parameter of the codebook is based at least in part on the quantity of antenna ports exceeding a threshold;
• and
• transmitting, to the network entity, the channel state information report.