Code-Aided Blind Multiuser Detection in Dispersive CDMA Channels
In this paper, we consider the problem of multiuser detection in DS/CDMA Systems operating over fading dispersive channels. The detection algorithm that we propose is blind and code-aided, i.e. it does require knowledge neither of the interfering users parameters (spreading codes, timing offsets and propagation channels), nor of the timing and channel impulse response of the user of interest, but only of its spreading code. The proposed reception structure is a two-stage one: the first stage is aimed at suppressing the multiuser interference, while the second-stage performs channel estimation and information bit detection. Simulation results show that the performance of the newly derived algorithm outperforms other blind receivers and achieves a very limited loss with respect to the non-blind multiuser MMSE receiver.
KeywordsChannel Estimation Minimum Mean Square Error Channel Impulse Response Multiuser Detection Spreading Code
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