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On the Impact of Multipath Propagation and Diversity in Performance of Iterative Block Decision Feedback Equalizers

Dinis, R. ; Souto, N.S. ; Carvalho, P. C.

On the Impact of Multipath Propagation and Diversity in Performance of Iterative Block Decision Feedback Equalizers, Proc IEEE International Conf. on Wireless and Mobile Computing, Networking and Communications - WiMob, Niagara Falls, Canada, Vol. -, pp. - - -, October, 2010.

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Abstract
SC modulation (Single-Carrier) with FDE (Frequency-Domain Equalization) combined with iterative (turbo) FDE schemes has excellent performance in severely time-dispersive channels, making it a promising candidate for future broadband wireless systems. In fact, it was observed that the performance can be close to the MFB (Matched Filter Bound).
In this paper we consider a class of iterative FDE schemes and we study the impact of the number of multipath components and the diversity order on its performance. It is shown that for a high number of separable multipath components the asymptotic performance approaches the MFB, even without diversity. When we have diversity the performance approaches the MFB faster, even when we have just a small number of separable multipath components.