H. Bolcskei et al., A subspace-based approach to blind channel identification in pulse shapingOFDM/OQAM systems, IEEE SIGNAL, 49(7), 2001, pp. 1594-1598
We introduce a subspace-based algorithm for the blind identification of tim
e-dispersive channels in pulse shaping OFDM systems based on offset quadrat
ure amplitude modulation (OFDM/OQAM). Our approach exploits cyclostationari
ty induced by the use of overlapping pulse shaping filters and uses second-
order statistics only. The proposed method is similar in spirit to modulati
on-induced cyclostationarity. Our algorithm assumes symbol-rate sampling in
the receiver and does not require knowledge of the channel order. We provi
de simulation results demonstrating the performance of the new method.