Accurate Direct Positioning in Distributed MIMO Using Delay-Doppler Channel Measurements

Benjamin J. B. Deutschmann; Christian Nelson; Mikael Henriksson; Gian Marti; Alva Kosasih; Nuutti Tervo; Erik Leitinger; Fredrik Tufvesson

arXiv · 2404.15936

Accurate Direct Positioning in Distributed MIMO Using Delay-Doppler Channel Measurements

Benjamin J. B. Deutschmann·Christian Nelson·Mikael Henriksson·Gian Marti·Alva Kosasih·Nuutti Tervo·Erik Leitinger·Fredrik Tufvesson

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Abstract

Distributed multiple-input multiple-output (D-MIMO) is a promising technology for simultaneous communication and positioning. However, phase synchronization between multiple access points in D-MIMO is challenging and methods that function without the need for phase synchronization are highly desired. Therefore, we present a method for D-MIMO that performs direct positioning of a moving device based on the delay-Doppler characteristics of the channel state information (CSI). Our method relies on particle-filter-based Bayesian inference with a state-space model. We use recent measurements from a sub-6 GHz D-MIMO OFDM system in an industrial environment to demonstrate near-centimeter accuracy under partial line-of-sight (LoS) conditions and decimeter accuracy under fully obstructed LoS.

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BibTeX RIS

Benjamin J. B. Deutschmann, Christian Nelson, Mikael Henriksson, Gian Marti, Alva Kosasih, Nuutti Tervo, Erik Leitinger, Fredrik Tufvesson. 2024-04-24. Accurate Direct Positioning in Distributed MIMO Using Delay-Doppler Channel Measurements. https://arxiv.org/abs/2404.15936

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