Designing Equalizers Based on Explicit Channel Models of DS-CDMA systems

In this paper, the entire process of transmission and reception in a DS-CDMA system, including the spreading , is described as a tapped delay line model with multiple inputs and a single output. This model is then used to design a fractionally spaced decision feedback equalizer with a single input and multiple outputs. In the proposed approach , long codes can be used and channel estimation can be performed in an eecient way. The suggested detector is near-far resistant. Simulations demonstrate the utility of the proposed approach in a heavily loaded system with and without power control where multipath is present.