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Localization and Throughput Trade-Off in a Multi-User Multi-Carrier mm-Wave System

Abstract : In this paper, we propose various localization error optimal beamforming strategies and subsequently study the trade-off between data and localization services while budgeting time and frequency resources in a multi-user millimeter-wave framework. Allocating more resources for the data service phase instead of localization would imply higher data rate but, concurrently, also a higher position and orientation estimation error. In order to characterize this trade-off, we firstly derive a flexible application-dependent localization error cost function combining the Cramer-Rao lower bounds of delay, angle of departure and/or angle of arrival estimates at a mobile receiver over the downlink. Consequently we devise different fairness criteria based localization error optimal beamforming strategies in a multi-user context. Finally, we show the advantage of the latter beamforming strategies and assess the communication-localization trade-off with respect to various time-frequency resource division schemes.
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Submitted on : Tuesday, July 7, 2020 - 3:22:53 PM
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Remun Koirala, Benoit Denis, Bernard Uguen, Davide Dardari, Henk Wymeersch. Localization and Throughput Trade-Off in a Multi-User Multi-Carrier mm-Wave System. IEEE Access, IEEE, 2019, 7, pp.167099-167112. ⟨10.1109/ACCESS.2019.2953777⟩. ⟨hal-02498131⟩

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