{"ID":2885615,"CreatedAt":"2026-06-01T04:54:23.091178241Z","UpdatedAt":"2026-06-01T04:54:23.091178241Z","DeletedAt":null,"paper_url":"https://arxiv.org/abs/2508.04169","arxiv_id":"2508.04169","title":"Subspace Fitting Approach for Wideband Near-Field Localization","abstract":"Two subspace fitting approaches are proposed for wideband near-field localization. Unlike in conventional far-field systems, where distance and angle can be estimated separately, spherical wave propagation in near-field systems couples these parameters. We therefore derive a frequency-domain near-field signal model for multi-target wideband systems and develop a subspace fitting-based MUSIC method that jointly estimates distance and angle. To reduce complexity, a Fresnel approximation MUSIC algorithm is further introduced to decouple the distance and angle parameters. Numerical results verify the effectiveness of both proposed approaches.","short_abstract":"Two subspace fitting approaches are proposed for wideband near-field localization. Unlike in conventional far-field systems, where distance and angle can be estimated separately, spherical wave propagation in near-field systems couples these parameters. We therefore derive a frequency-domain near-field signal model for...","url_abs":"https://arxiv.org/abs/2508.04169","url_pdf":"https://arxiv.org/pdf/2508.04169v1","authors":"[\"Ruiyun Zhang\",\"Zhaolin Wang\",\"Zhiqing Wei\",\"Yuanwei Liu\",\"Zehui Xiong\",\"Zhiyong Feng\"]","published":"2025-08-06T07:48:50Z","proceeding":"eess.SP","tasks":"[\"eess.SP\"]","methods":"[]","has_code":false}