Title: The 5G Localization Waveform Ranging Accuracy over Time-Dispersive Channels – An Evaluation
Author(s): Emanuel Staudinger, Michael Walter, Armin Dammann
Published in: Proceedings of the 29th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2016)
September 12 - 16, 2016
Oregon Convention Center
Portland, Oregon
Pages: 2271 - 2280
Cite this article: Staudinger, Emanuel, Walter, Michael, Dammann, Armin, "The 5G Localization Waveform Ranging Accuracy over Time-Dispersive Channels – An Evaluation," Proceedings of the 29th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2016), Portland, Oregon, September 2016, pp. 2271-2280.
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Abstract: Localization has increasingly become important for a variety of applications and context aware services. Today’s mobile communication terminals exploit existing reference signal structures for propagation delay based positioning. Recently, particular single-parametrized waveforms with adaptable power spectral densities (PSDs) haven been proposed in the context of 5G. These waveforms haven been investigated based on Cramer- ´ Rao lower bounds (CRLBs) and Ziv-Zakai lower bounds (ZZLBs) for multipath-free channels. Time-dispersive channels have neither been investigated theoretically nor numerically. In this work, we make this gap smaller by numerical evaluations of the proposed waveforms. We focus on a simple correlation-based receiver and investigate the resulting ranging error. Our evaluations with varying root mean square (RMS) delay spread and fixed Rician K-factor clearly show, for which particular channels and signal bandwidths specific waveforms and their respective parameters should be chosen. A ranging error reduction of factor 1.2 to more than 5 compared to state of the art reference signals can be obtained. Hence, we pave the way to possibly place a new waveform within the 5G context for improved ranging accuracy compared to state of the art.