OFDM/OQAM for Spread-Spectrum Transmission.

We propose an alternative to the well-known MC-CDMA technique for downlink transmission by replacing the conventional cyclic-prefix OFDM modulation by an advanced filterbank-based multicarrier system (OFDM/OQAM). Indeed, in one hand, MC-CDMA has already proved its ability to fight against frequency selective channels thanks to the use of the OFDM modulation and its high flexibility in multiple access thanks to the CDMA component. In the other hand, OFDM/OQAM modulation confers a theoretically optimal spectral efficiency as it operates without guard interval. In this paper, we study OFDM/OQAM with CDMA combination and we compare it to the conventional MC- CDMA scheme in terms of Bit Error Rate (BER). [ABSTRACT FROM AUTHOR]