Near Field Tapering with Slepian Window: Balancing the Range Angle Sidelobe Trade off
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866918203888762880 |
|---|---|
| author | Hussain, Ahmed Sultan, Ahmed Abdallah, Asmaa Celik, Abdulkadir Eltawil, Ahmed M. |
| author_facet | Hussain, Ahmed Sultan, Ahmed Abdallah, Asmaa Celik, Abdulkadir Eltawil, Ahmed M. |
| contents | Near-field beamforming enables target discrimination in both range (axial) and angle (lateral) dimensions. Elevated sidelobes along either dimension, however, increase susceptibility to interference and degrade detection performance. Conventional amplitude tapering techniques, designed for far-field scenarios, cannot simultaneously suppress axial and lateral sidelobes in near-field. In this letter, we propose a Slepian-based amplitude tapering approach that maximizes mainlobe energy concentration, achieving significant sidelobe reduction in both dimensions. Numerical results show that the proposed taper improves peak sidelobe suppression by approximately 24 dB in the lateral domain and 10 dB in the axial domain compared to a conventional uniform window. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_12733 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Near Field Tapering with Slepian Window: Balancing the Range Angle Sidelobe Trade off Hussain, Ahmed Sultan, Ahmed Abdallah, Asmaa Celik, Abdulkadir Eltawil, Ahmed M. Signal Processing Near-field beamforming enables target discrimination in both range (axial) and angle (lateral) dimensions. Elevated sidelobes along either dimension, however, increase susceptibility to interference and degrade detection performance. Conventional amplitude tapering techniques, designed for far-field scenarios, cannot simultaneously suppress axial and lateral sidelobes in near-field. In this letter, we propose a Slepian-based amplitude tapering approach that maximizes mainlobe energy concentration, achieving significant sidelobe reduction in both dimensions. Numerical results show that the proposed taper improves peak sidelobe suppression by approximately 24 dB in the lateral domain and 10 dB in the axial domain compared to a conventional uniform window. |
| title | Near Field Tapering with Slepian Window: Balancing the Range Angle Sidelobe Trade off |
| topic | Signal Processing |
| url | https://arxiv.org/abs/2511.12733 |