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arXiv · 2604.13807

Frugal Radio SLAM: Coherent Imaging with One Subcarrier and One Snapshot in Distributed MIMO

Yu Ge·Xin Tong·Nenad Vukmirović·Musa Furkan Keskin·Miljko Erić·Petar Djurić·Henk Wymeersch
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Abstract

We study uplink radio simultaneous localization and mapping (SLAM) in a pre-calibrated phase-coherent distributed MIMO (D-MIMO) system at a minimal sensing-resource operating point: a single-antenna user equipment (UE) transmits one narrowband pilot, and each single-antenna access points (APs) provides one complex observation. We formulate coherent matched-filter imaging over a spatial grid, where the UE, virtual UEs associated with planar reflectors, and point scatterers share an equivalent-source representation. A greedy detect-and-cancel procedure separates these components. Simulations show that, at the considered noise level, weak-target recovery is limited primarily by cancellation residuals and model saturation, rather than by the noise floor.

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Yu Ge, Xin Tong, Nenad Vukmirović, Musa Furkan Keskin, Miljko Erić, Petar Djurić, Henk Wymeersch. 2026-04-15. Frugal Radio SLAM: Coherent Imaging with One Subcarrier and One Snapshot in Distributed MIMO. https://arxiv.org/abs/2604.13807

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