Title :
Design method of OFDM/OQAM systems using a weighted time-frequency localization criterion
Author :
Dandach, Y. ; Siohan, P.
Author_Institution :
Orange Labs., France Telecom, Cesson-Sevigne, France
Abstract :
Filterbank-based multicarrier modulations as OFDM with offset QAM (OFDM/OQAM) can provide a time-frequency well-localized pulse shape. We can exploit this property to reduce the intersymbol interference (ISI) and interchannel interference (ICI) when the transmission is over time and frequency dispersive channels. Several criteria can satisfy this goal. In this paper, we introduce a new criterion to optimize the OFDM/OQAM pulse shape. The proposed criterion is flexible and leads to a fast design optimization procedure. In addition the pulse shape obtained is perfectly orthogonal.
Keywords :
OFDM modulation; adjacent channel interference; channel bank filters; intersymbol interference; quadrature amplitude modulation; OFDM-OQAM systems; filterbank-based multicarrier modulations; frequency dispersive channels; interchannel interference; intersymbol interference; time-frequency pulse shape; weighted time-frequency localization criterion; well-localized pulse shape; Dispersion; Frequency modulation; OFDM; Prototypes; Shape; Time-frequency analysis;
Conference_Titel :
Signal Processing Conference, 2010 18th European
Conference_Location :
Aalborg