Method and apparatus for transmitting or receiving information for artificial intelligence based channel state information feedback in wireless communication system

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

• an encoder;
• a transceiver;
• and
• at least one processor,
• wherein the at least one processor is configured to:
• receive channel stated information (CSI) report configuration information from a base station (BS) through the transceiver;
• generate compressed CSI feedback data through the encoder based on the CSI report configuration information and generate side information relating to the compressed CSI feedback data;
• and
• transmit the compressed CSI feedback data and the side information to the BS through the transceiver.

A method for a base station (BS) in a wireless communication system, the method comprising:

• transmitting channel state information (CSI) report configuration information to a user equipment (UE);
• receiving, from the UE, compressed CSI feedback data determined based on the CSI report configuration information and side information relating to the compressed CSI feedback data;
• reconstructing the compressed CSI feedback data through a decoder comprised by the BS;
• and
• post-processing the reconstructed CSI feedback data through a post-processor comprised by the BS based on the side information.