Apparatus and methods for canceling interference for 5G ICS repeater

A method for canceling interference performed by a 5G ICS repeater, the method comprising:

• obtaining a first error signal by removing a first predicted feedback signal from a first original signal received through a reception antenna;
• generating a first delay signal by delaying the first error signal;
• generating a first narrowband cancellation signal by removing characteristics of a narrowband signal from the first delay signal;
• determining whether the first original signal is a null signal based on magnitude information of the first error signal;
• determining either of the first delay signal and the first narrowband cancellation signal as a first reference signal according to a determination result of whether the first original signal is a null signal;
• and
• generating a second predicted feedback signal based on the first reference signal.

An apparatus for canceling interference for a 5G ICS repeater comprising:

• a time delay unit generating a first delay signal by delaying a first error signal obtained by removing a first predicted feedback signal from a first original signal received through a reception antenna;
• a reference signal determination unit determining whether the first original signal is a null signal based on magnitude information of the first error signal and determining a first reference signal based on the first delay signal according to a determination result of whether the first original signal is a null signal;
• and
• a predicted feedback signal generation unit generating a second predicted feedback signal based on the first reference signal.

An apparatus for canceling interference for a 5G ICS repeater comprising:

• a time delay unit generating a first delay signal by delaying a first error signal obtained by removing a first predicted feedback signal from a first original signal received from a reception antenna;
• an autocorrelation canceller generating a first narrowband cancellation signal by removing characteristics of a narrowband signal from the first delay signal;
• a reference signal selection unit determining whether the first original signal is a null signal based on magnitude information of the first error signal and selecting either of the first delay signal and the first narrowband cancellation signal as a first reference signal based on a determination result of whether the first original signal is a null signal;
• and
• a predicted feedback signal generation unit generating a second predicted feedback signal based on the first reference signal.