Near-Field Beampointing with Low Exposure Regions: a Dominant Subspace Projection Approach
(2026) Eusipco 2026
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- Abstract
- 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.
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Citations
Defraigne, L., Monnoyer de Galland de Carnières, G., Louveaux, J., & Vandendorpe, L. (2026). Near-Field Beampointing with Low Exposure Regions: a Dominant Subspace Projection Approach. Eusipco 2026. https://hdl.handle.net/2078.5/279480