Codebook design method and device in a wireless communication system

A method of a first communication node, the method comprising:

• mapping combination indexes to antenna panels and spatial layers configurable using a plurality of antennas;
• transmitting mapping information for the combination indexes to a second communication node;
• transmitting a time delay reference signal (TD-RS) to the second communication node based on a frequency-domain density according to a subcarrier spacing (SCS);
• receiving time delay values for respective subcarriers, which are respectively mapped to the spatial layers and the antenna panels, from the second communication node;
• generating second frequency-dependent second phase shift matrices (PSMs) based on the received time delay values;
• and
• generating a second codebook compensating for a beam squint phenomenon of beams generated by the plurality of antennas by multiplying matrices of a basic codebook with the second PSMs.

A first communication node comprising at least one processor, wherein the at least one processor causes the first communication node to perform:

• mapping combination indexes to antenna panels and spatial layers configurable using a plurality of antennas, and transmitting mapping information for the combination indexes to a second communication node;
• transmitting a time delay reference signal (TD-RS) to the second communication node based on a frequency-domain density according to a subcarrier spacing (SCS);
• receiving time delay values for respective subcarriers, which are respectively mapped to the spatial layers and the antenna panels, from the second communication node;
• generating second frequency-dependent second phase shift matrices (PSMs) based on the received time delay values;
• and
• generating a second codebook compensating for a beam squint phenomenon of beams generated by the plurality of antennas by multiplying matrices of a basic codebook with the second PSMs.