Blind Self-Interference Cancellation for Full-Duplex Relays

GUSTAVO J. GONZÁLEZ; FERNANDO H. GREGORIO; JUAN E. COUSSEAU

Pacific Grove

Conferencia; Forty-Eight Asilomar Conference on Signals, Systems & Computers; 2014

IEEE Signal Processing Society

Full-duplex relays improve spectral efficiency buttransmission and reception in the same frequency band producecoupling between the transmitter and receiver side signals.This self-interference requires to be removed to allow a properoperation. The cyclic prefix employed in modern modulationsproduces a periodic autocorrelation that is perturbed by therelay coupling. We propose a criterion, and an associated blindadaptive algorithm, to estimate the self-interference that employsthe known autocorrelation pattern of the source signal as areference. We present an study of the mean squared error ofthe criterion and analyze the stationary points of the algorithm.