BLINDCHANNEL EQUALIZATIONAND CARRIERFREQUENCY OFFSETESTIMATIONFOR MC-CDMA SYSTEMSUSINGGUARD INTERVALREDUNDANCY AND EXCESSCODES

Itiswellknownthat multipath channel andcarrier frequency offset destroy theorthogonality between subcarriersinthedownlink ofMC-CDMA anddegrade thesystemperformance. Inthis paper, anewlowcomplexity algorithm isproposed toiteratively estimate thecarrier frequency offset (CFO)andthechannel equalizer using only theguard interval (GI)redundancy, orexcess codes (EC) orboth(GI)and(EC)without additional pilots. Simulations illustrate andcompare theperformance efficiency of these schemes indifferent scenarios.