Apparatus and method for cancelling self-interference signal in communication system supporting full-duplex scheme

An apparatus for cancelling a self-interference (SI) signal in a communication system supporting a full-duplex scheme, the apparatus comprising:

• a first processor configured to estimate an SI channel, and to perform a pre-filtering operation on a transmission signal based on the estimated SI channel;
• and
• second processors configured to generate copied-SI signals based on the estimated SI channel and the pre-filtered transmission signal,
• wherein the first processor is further configured to cancel an SI signal based on the copied-SI signals,
• wherein the pre-filtering operation includes an operation for decreasing a number of SI signals, and
• wherein the first processor is configured to acquire a pre-filter which is time reverse for the estimated SI channel and is a complex conjugate, and filter the transmission signal based on the acquired pre-filter.