Multibeam Sparse Tiled Planar Array for Joint Communication and Sensing
Hadi Alidoustaghdam, Andr\'e Kokkeler, Yang Miao

TL;DR
This paper introduces a sparse tiled planar array design for joint communication and sensing that achieves high angular resolution and reduced blockage time while maintaining spectral efficiency, using non-convex optimization and array irregularity.
Contribution
The paper proposes a novel sparse tiled planar array design with irregular geometry, optimizing phase centers and subarray selection for improved JCAS performance.
Findings
Enhanced angle of arrival estimation with 125 elements distinguishing targets with 20° difference.
40% reduction in blockage time compared to uniform planar arrays.
Maintains spectral efficiency comparable to conventional arrays.
Abstract
Multibeam analog arrays have been proposed for millimeter-wave joint communication and sensing (JCAS). We study multibeam planar arrays for JCAS, providing time division duplex communication and full-duplex sensing with steerable beams. In order to have a large aperture with a narrow beamwidth in the radiation pattern, we propose to design a sparse tiled planar array (STPA) aperture with affordable number of phase shifters. The modular tiling and sparse design of the array are non-convex optimization problems, however, we exploit the fact that the more irregularity of the antenna array geometry, the less the side lobe level. We propose to first solve the optimization by the maximum entropy in the phase centers of tiles in the array; then we perform sparse subarray selection leveraging the geometry of the sunflower array. While maintaining the same spectral efficiency in the…
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Taxonomy
TopicsAntenna Design and Optimization · Millimeter-Wave Propagation and Modeling · Advanced MIMO Systems Optimization
