Synchronization over rapidly time-varying multipath channel for CDMA downlink RAKE receivers in Time-Division modeReport as inadecuate




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1 IEMN - Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 2 GIPSA-C2S - C2S GIPSA-DIS - Département Images et Signal

Abstract : In this paper, we consider a Time-Division CDMA system operating in downlink mode in a multi-user multipath channel scenario. In order to implement RAKE reception, delays, phases and magnitudes of the different paths need to be estimated and the estimates updated. In the context of burst transmissions, delays do not vary during a burst and only phases and magnitudes need to be tracked. In this paper we investigate the issue of phase tracking over rapidly time varying multipath channels. We propose a new version of a conventional phase loop that mitigates the interpath interference effect. The optimization is based on the concept of prefiltering. The analysis shows improved tracking performance in comparison with the standard phase recovery algorithm.

Keywords : downlink. phase estimation multipath channels downlink Code Division Multiple Access CDMA





Author: Eric Simon - Laurent Ros - Kosai Raoof -

Source: https://hal.archives-ouvertes.fr/



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