A subspace-based approach to blind channel identification in pulse shaping OFDM/OQAM systems
Helmut Bölcskei, Pierre Duhamel, and Rima Hleiss
IEEE Transactions on Signal Processing, Vol. 49, No. 7, pp. 1594-1598, July 2001
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We introduce a subspace-based algorithm for
the blind identification of time-dispersive channels in pulse shaping OFDM systems based on offset
QAM (OFDM/OQAM). Our approach exploits cyclostationarity induced by the use of overlapping
pulse shaping filters and uses second-order statistics only. The proposed method is similar in spirit to
modulation-induced cyclostationarity [1,2]. Our algorithm assumes symbol-rate sampling
in the receiver and does not require knowledge of the channel order.
We provide simulation results demonstrating the performance of the new method.
OFDM, offset QAM, pulse shaping, filter design, Zak transform, FFT
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