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On the impact of multipath propagation and diversity in performance of iterative block decision feedback equalizers

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4 Author(s)
Fábio Coelho ; Departamento de Engenharia Electrotécnica, Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa, 2829-516 Caparica, Portugal ; Rui Dinis ; Nuno Souto ; Paulo Montezuma

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.

Published in:

2010 IEEE 6th International Conference on Wireless and Mobile Computing, Networking and Communications

Date of Conference:

11-13 Oct. 2010