Method and apparatus for obtaining nonlinear interference information of frequency domain in wireless communication system

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

• receiving first reference signal (RS)-related information for a user equipment (UE) and second RS-related information for an interference UE that is causing nonlinearity interference to the UE;
• receiving a first RS based on the first RS-related information and a second RS based on the second RS-related information;
• obtaining first nonlinearity information for nonlinearity of a first signal transmitted and received between the BS and the UE and second nonlinearity information for nonlinearity of a second signal transmitted and received between the BS and the interference UE, based on the first RS and the second RS;
• and
• performing nonlinearity compensation (NC) for an uplink signal received from the UE, based on the first nonlinearity information and the second nonlinearity information.

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

• a transceiver;
• and
• a processor,
• wherein the processor is configured to:
• receive first reference signal (RS)-related information for the UE and second RS-related information for an interference UE that is causing nonlinearity interference to the UE,
• receive a first RS based on the first RS-related information and a second RS based on the second RS-related information,
• obtain first nonlinearity information for nonlinearity of a first signal that a base station (BS) transmits to the UE and second nonlinearity information for nonlinearity of a second signal that the BS transmits to the interference UE, based on the first RS and the second RS, and
• perform nonlinearity compensation (NC) for a downlink signal received from the BS, based on the first nonlinearity information and the second nonlinearity information.

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

• a transceiver;
• and
• a processor,
• wherein the processor is configured to:
• receive first reference signal (RS)-related information for a user equipment (UE) and second RS-related information for an interference UE that is causing nonlinearity interference to the UE,
• receive a first RS based on the first RS-related information and a second RS based on the second RS-related information,
• obtain first nonlinearity information for nonlinearity of a first signal transmitted and received between the BS and the UE and second nonlinearity information for nonlinearity of a second signal transmitted and received between the BS and the interference UE, based on the first RS and the second RS, and
• perform nonlinearity compensation (NC) for an uplink signal received from the UE, based on the first nonlinearity information and the second nonlinearity information.