Reference-free adaptive interference cancellation using cross-coupled scheme

This paper deals with the reference-free adaptive interference cancelling techniques. A new cross-coupled adaptive interference canceller (CC-AIC), with only a single input is introduced. This scheme is capable for cancelling narrow-band interference (NBI) from a broadband signal or wideband noise from a narrow-band signal with a significantly better cancellation performance than the conventional techniques. Cancellation was obtained even when the interference has a small power spectral density with respect to the desired signal and vice versa. Furthermore, this scheme can also be used efficiently as a speech enhancer.