Method for transmitting sidelink signal in wireless communication system

An apparatus for a user equipment (UE) in a wireless communication system, the apparatus comprising:

• at least one processor;
• and
• at least one memory operably coupled to the at least one processor and storing at least one instruction causing the at least one processor to perform operations,
• wherein the operations include:
• transmitting sidelink control information (SCI);
• receiving information about a predefined function;
• mapping at least one complex-valued modulation symbol associated with a sidelink data signal and a preconfigured value to a plurality of subcarriers;
• generating the sidelink data signal by orthogonal frequency division multiplexing (OFDM)-modulating the at least one complex-valued modulation symbol and the preconfigured value;
• and
• transmitting the sidelink data signal based on the SCI,
• wherein the SCI includes information about a subcarrier set including at least one subcarrier to which the preconfigured value is mapped among the plurality of subcarriers,
• wherein the subcarrier set is associated with a specific index value,
• wherein based on the subcarrier set being defined on an OFDM symbol basis, the information about the subcarrier set includes an index value of a subcarrier set defined for an earliest OFDM symbol in the time domain among a plurality of OFDM symbols associated with the sidelink data signal,
• wherein the predefined function is used to determine subcarrier sets defined for remaining OFDM symbols except for the earliest OFDM symbol in the time domain among the plurality of OFDM symbols associated with the sidelink data signal, and
• wherein at least one of a frequency-domain position or number of the at least one subcarrier to which the preconfigured value is mapped is different in each subcarrier set.