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arXiv · 2603.03851

Pearcey-Inspired Quartic Wavefront Shaping for Obstructed Near-Field Multi-User Communications

Mingcan Qin·Jing Chen·Yifeng Qin
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Abstract

Radiative near-field (RNF) beamforming is vulnerable to Fresnel-zone blockages. This letter proposes an obstruction-unaware wavefront shaping strategy inspired by catastrophe optics: a calibrated quartic phase generates a Pearcey-inspired wavepacket that improves effective multi-user channel separability in the tested partially blocked geometries. The quartic beam is calibrated in free space without obstruction information, while digital zero-forcing (ZF) uses the resulting effective channel to evaluate common SINR under a shared total transmit-power constraint. Numerical results demonstrate a peak sampled common-SINR gain of $4.29$~dB over conventional focusing when closely spaced users experience strong central blockage.

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Mingcan Qin, Jing Chen, Yifeng Qin. 2026-09-15. Pearcey-Inspired Quartic Wavefront Shaping for Obstructed Near-Field Multi-User Communications. https://arxiv.org/abs/2603.03851

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