Designing Equalizers Based on Explicit
Channel Models of DS-CDMA Systems
IEEE International Conference on Universal
September 29 - October 2, 1996. © 1996 IEEE.
Over the years, many detectors have been proposed for systems
Multiple Access (CDMA). Here we develop a framework for the
design of such detectors, (especially multiuser detectors).
We also derive such a detector, a multivariable DFE.
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 efficient 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.
- Related publications:
PhD Thesis by Claes Tidestav.
which includes a derivation of the fractionally spaced DFE
at the Swedish Radio Conference 1996.
- Postscript (uncompressed)
Postscript (compressed, .gz) 88K ;
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