Title :
LSF-CMA based blind equalization algorithms for MC-CDMA systems
Author_Institution :
Telecommunication and digital signal processing laboratory, University of Sidi Bel Abbes
Abstract :
In this paper, a new blind equalization for multiuser multi-carrier code division multiple access (MC-CDMA) systems under Rayleigh multipath fading channel is proposed. The later causes the ICI and ISI that destroy the relationship of the guard interval (GI) redundancy. Through exploiting the structural properties of MC-CDMA transmitted signal, the estimation can be resolved using least square fitting (LSF) and subspace approaches. Indeed, GI redundancy together with excess codes (EC) are used to restore the MC-CDMA properties. In addition, we propose the use of the previous algorithms in conjunction with a constant modulus algorithm (CMA) to improve the performance gain. Our simulation results show the robustness and effectiveness of the proposed algorithms.
Keywords :
Rayleigh channels; blind equalisers; code division multiple access; least squares approximations; multipath channels; LSF-CMA based blind equalization algorithms; MC-CDMA systems; Rayleigh multipath fading channel; blind equalization; constant modulus algorithm; excess codes; guard interval redundancy; least square fitting; multiuser multicarrier code division multiple access systems; subspace approaches; Bit error rate; Blind equalizers; Multicarrier code division multiple access; OFDM; Redundancy;
Conference_Titel :
Systems, Signal Processing and their Applications (WOSSPA), 2011 7th International Workshop on
Conference_Location :
Tipaza
Print_ISBN :
978-1-4577-0689-9
DOI :
10.1109/WOSSPA.2011.5931452
