Method and apparatus for transmitting a signal in wireless communication system

A terminal comprising at least one processor, wherein the at least one processor causes the terminal to perform:

• receiving, from a base station, a carrier wave signal including subcarriers belonging to a sensing group within a system bandwidth;
• modulating pre-collected information based on receiving the carrier wave signal;
• and
• backscattering, to the base station, the carrier wave signal including the subcarriers of the sensing group,
• wherein at least one subcarrier among the subcarriers of the sensing group transmitted through the backscattered carrier wave signal includes the modulated information, and the subcarriers of the sensing group include a data-transmission subcarrier on which the modulated information is transmitted and a non-data-transmission subcarrier on which the modulated information is not transmitted.

A method of a base station, comprising:

• broadcasting, through a carrier wave signal, subcarriers belonging to a sensing group within a system bandwidth;
• receiving, from a terminal, a backscattered signal including modulated information;
• and
• detecting the modulated information in units of a predetermined symbol unit,
• wherein the subcarriers of the sensing group include a data-transmission subcarrier on which the modulated information is transmitted and a non-data-transmission subcarrier on which the modulated information is not transmitted, and
• wherein the modulated information is in units of one bit.