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arXiv · 2508.09546

Low-latency D-MIMO Localization using Distributed Scalable Message-Passing Algorithm

Dumitra Iancu·Liang Liu·Ove Edfors·Erik Leitinger·Xuhong Li
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Abstract

Distributed MIMO and integrated sensing and communication are expected to be key technologies in future wireless systems, enabling reliable, low-latency communication and accurate localization. Dedicated localization solutions must support distributed architecture, provide scalability across different system configurations and meet strict latency requirements. We present a scalable message-passing localization method and architecture co-designed for a panel-based distributed MIMO system and network topology, in which interconnected units operate without centralized processing. This method jointly detects line-of-sight paths to distributed units from multipath measurements in dynamic scenarios, localizes the agent, and achieves very low latency. Additionally, we introduce a cycle-accurate system latency model based on implemented FPGA operations, and show important insights into processing latency and hardware utilization and system-level trade-offs. We compare our method to a multipath-based localization method and show that it can achieve similar localization performance, with wide enough distribution of array elements, while offering lower latency and computational complexity.

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Dumitra Iancu, Liang Liu, Ove Edfors, Erik Leitinger, Xuhong Li. 2025-08-13. Low-latency D-MIMO Localization using Distributed Scalable Message-Passing Algorithm. https://arxiv.org/abs/2508.09546

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