An anchor-free near-field localization framework using optimized passive RIS configurations and a two-stage cosine-similarity grid search delivers small root mean square error for practical SNR, RIS size, and antenna counts.
Leveraging RIS-enabled smart signal prop- agation for solving infeasible localization problems: Scenarios, key research directions, and open challenges,
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Near-field Anchor-free Localization using Reconfigurable Intelligent Surfaces
An anchor-free near-field localization framework using optimized passive RIS configurations and a two-stage cosine-similarity grid search delivers small root mean square error for practical SNR, RIS size, and antenna counts.