Pearcey-Inspired Quartic Wavefront Shaping for Obstructed Near-Field Multi-User Communications
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arXiv
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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866915833064718336 |
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| author | Qin, Yifeng Chen, Jing Jiang, Zhi Hao |
| author_facet | Qin, Yifeng Chen, Jing Jiang, Zhi Hao |
| contents | Radiative near-field (RNF) beamforming is vulnerable to blockages that disrupt Fresnel zones. This letter proposes an obstruction-unaware wavefront shaping strategy inspired by catastrophe optics. By superimposing a calibrated quartic phase, we generate a Pearcey-like wave packet that exhibits structural stability against perturbations. We establish a fair comparison protocol where the quartic beam is calibrated in free space to avoid exploiting obstruction knowledge. Numerical results demonstrate up to 8.5~dB SINR gain over conventional focusing for multi-user scenarios near the depth-of-focus limit. Crucially, this gain stems from improved channel conditioning under partial blockage, which mitigates the severe noise amplification inherent to zero-forcing precoding. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2603_03851 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Pearcey-Inspired Quartic Wavefront Shaping for Obstructed Near-Field Multi-User Communications Qin, Yifeng Chen, Jing Jiang, Zhi Hao Optics Signal Processing Radiative near-field (RNF) beamforming is vulnerable to blockages that disrupt Fresnel zones. This letter proposes an obstruction-unaware wavefront shaping strategy inspired by catastrophe optics. By superimposing a calibrated quartic phase, we generate a Pearcey-like wave packet that exhibits structural stability against perturbations. We establish a fair comparison protocol where the quartic beam is calibrated in free space to avoid exploiting obstruction knowledge. Numerical results demonstrate up to 8.5~dB SINR gain over conventional focusing for multi-user scenarios near the depth-of-focus limit. Crucially, this gain stems from improved channel conditioning under partial blockage, which mitigates the severe noise amplification inherent to zero-forcing precoding. |
| title | Pearcey-Inspired Quartic Wavefront Shaping for Obstructed Near-Field Multi-User Communications |
| topic | Optics Signal Processing |
| url | https://arxiv.org/abs/2603.03851 |