Uplink Single-Snapshot Frugal SLAM in Phase-Coherent Distributed MIMO Systems
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arXiv
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| Format: | Preprint |
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2026
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| author | Ge, Yu Tong, Xin Vukmirović, Nenad Keskin, Musa Furkan Erić, Miljko Djurić, Petar Wymeersch, Henk |
| author_facet | Ge, Yu Tong, Xin Vukmirović, Nenad Keskin, Musa Furkan Erić, Miljko Djurić, Petar Wymeersch, Henk |
| contents | We consider uplink frugal simultaneous localization and mapping (SLAM) in phase-coherent distributed MIMO (D-MIMO) systems, where a network of spatially separated single-antenna access points (APs) coherently receives narrowband, single-snapshot pilot signals from a single-antenna user equipment (UE). In contrast to existing phase-coherent localization and SLAM methods that rely on wideband measurements and/or multi-antenna APs, the proposed frugal setting operates with the minimum possible localization resources: a single subcarrier and a single snapshot at each single-antenna AP. In this paper, we formulate phase-coherent frugal SLAM as a coherent imaging problem, constructing a spatial image over a region of interest by treating the distributed AP observations as coming from a large synthetic aperture. Based on the coherent image, we develop a detection and localization framework that jointly identifies the UE, reflective surfaces, and scatterers. Simulation results validate the proposed framework and provide insights into the impact of grid resolution and off-grid error on detection and localization performance. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_13807 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Uplink Single-Snapshot Frugal SLAM in Phase-Coherent Distributed MIMO Systems Ge, Yu Tong, Xin Vukmirović, Nenad Keskin, Musa Furkan Erić, Miljko Djurić, Petar Wymeersch, Henk Signal Processing We consider uplink frugal simultaneous localization and mapping (SLAM) in phase-coherent distributed MIMO (D-MIMO) systems, where a network of spatially separated single-antenna access points (APs) coherently receives narrowband, single-snapshot pilot signals from a single-antenna user equipment (UE). In contrast to existing phase-coherent localization and SLAM methods that rely on wideband measurements and/or multi-antenna APs, the proposed frugal setting operates with the minimum possible localization resources: a single subcarrier and a single snapshot at each single-antenna AP. In this paper, we formulate phase-coherent frugal SLAM as a coherent imaging problem, constructing a spatial image over a region of interest by treating the distributed AP observations as coming from a large synthetic aperture. Based on the coherent image, we develop a detection and localization framework that jointly identifies the UE, reflective surfaces, and scatterers. Simulation results validate the proposed framework and provide insights into the impact of grid resolution and off-grid error on detection and localization performance. |
| title | Uplink Single-Snapshot Frugal SLAM in Phase-Coherent Distributed MIMO Systems |
| topic | Signal Processing |
| url | https://arxiv.org/abs/2604.13807 |