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Turbo Detection for the Uplink of CP-Assisted DS-CDMA Systems

In this paper we consider the use of CP-assisted (Cyclic Prefix) DS-CDMA schemes (Direct Sequence Code Division Multiple Access) in the uplink of broadband wireless systems. We present frequency-domain receivers that combine turbo equalization and multiuser detection. The performance of the proposed receiver can be close to the single-user MFB (Matched Filter Bound), even for fully loaded systems and severely time-dispersive channels. Moreover, our receivers can also cope with overloaded scenarios.