Near-Field Beampointing with Low Exposure Regions: a Dominant Subspace Projection Approach
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2026
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| _version_ | 1866917273883639808 |
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| author | Defraigne, Laurence Monnoyer, Gilles Louveaux, Jérôme Vandendorpe, Luc |
| author_facet | Defraigne, Laurence Monnoyer, Gilles Louveaux, Jérôme Vandendorpe, Luc |
| contents | The spherical nature of the wavefronts exhibited in the near-field of antenna arrays enables advanced beamforming capabilities, such as beampointing and beamnulling. In this paper, we exploit these properties to design a near-field beam pattern under a low exposure region constraint. We address the continuous region constraint through spatial discretization, which results in a large number of constraints that lead to prohibitive computational complexity. We propose a novel low-complexity algorithm that enables a computationally tractable beam pattern design. It uses a low-dimensional subspace representation of the low exposure region based on a singular value decomposition. Our approach achieves low complexity while providing a power received at a target user close to the optimal achievable power, yet with uniform power mitigation over the low exposure region. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_13023 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Near-Field Beampointing with Low Exposure Regions: a Dominant Subspace Projection Approach Defraigne, Laurence Monnoyer, Gilles Louveaux, Jérôme Vandendorpe, Luc Signal Processing The spherical nature of the wavefronts exhibited in the near-field of antenna arrays enables advanced beamforming capabilities, such as beampointing and beamnulling. In this paper, we exploit these properties to design a near-field beam pattern under a low exposure region constraint. We address the continuous region constraint through spatial discretization, which results in a large number of constraints that lead to prohibitive computational complexity. We propose a novel low-complexity algorithm that enables a computationally tractable beam pattern design. It uses a low-dimensional subspace representation of the low exposure region based on a singular value decomposition. Our approach achieves low complexity while providing a power received at a target user close to the optimal achievable power, yet with uniform power mitigation over the low exposure region. |
| title | Near-Field Beampointing with Low Exposure Regions: a Dominant Subspace Projection Approach |
| topic | Signal Processing |
| url | https://arxiv.org/abs/2602.13023 |