Title :
A subspace-based approach to blind channel identification in pulse shaping OFDM/OQAM systems
Author :
Bolcskei, Helmut ; Duhamel, Pierre ; Hleiss, R.
Author_Institution :
Coordinated Sci. Lab., Illinois Univ., Urbana, IL
fDate :
7/1/2001 12:00:00 AM
Abstract :
We introduce a subspace-based algorithm for the blind identification of time-dispersive channels in pulse shaping OFDM systems based on offset quadrature amplitude modulation (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. 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
Keywords :
OFDM modulation; dispersive channels; identification; pulse shaping; quadrature amplitude modulation; statistical analysis; time-varying channels; blind channel identification; cyclostationarity; offset quadrature amplitude modulation; overlapping pulse shaping filters; performance; pulse shaping OFDM/OQAM systems; receiver; second-order statistics; subspace-based approach; symbol-rate sampling; time-dispersive channels; Filters; OFDM modulation; Pulse shaping methods; Quadrature amplitude modulation; Sampling methods; Satellite broadcasting; Signal processing; Statistics; Telecommunication standards; Wireless sensor networks;
Journal_Title :
Signal Processing, IEEE Transactions on
