In-band full duplex system and interference signal offset method thereof

The invention discloses an in-band full duplex system and an interference signal offset method thereof. The method comprises the following steps: controlling an in-band full duplex system to enter an external interference channel test mode, and obtaining a first channel response of an external interference channel; controlling the in-band full duplex system to enter a radio frequency offset channel test mode, and obtaining a second channel response of the radio frequency offset channel; obtaining a first filter coefficient according to the first channel response and the second channel response, and loading the first filter coefficient to a first digital filter; controlling the in-band full duplex system to enter a normal working mode, and performing signal reconstruction on the baseband transmitting signal by using a first digital filter to obtain a reconstructed baseband transmitting signal; and conditioning the reconstructed baseband emission signal into a radio frequency offset signal in a radio frequency