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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2512.17016 |
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| _version_ | 1866917165475561472 |
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| author | Santana, J. M. Heller, L. Buehrer, R. M. |
| author_facet | Santana, J. M. Heller, L. Buehrer, R. M. |
| contents | Large Low Earth Orbit (LEO) constellations (e.g., Starlink and Iridium) significantly increase the likelihood of transient, high-power interference events at ground receivers. This report presents SatTrack, a GUI-driven simulation framework that (i) tracks satellite motion relative to a fixed antenna boresight, (ii) predicts reflector gain patterns of a parabolic reflector antenna with a reconfigurable rim of specified size using a physical optics (PO) surface-current model decomposed into fixed and reconfigurable rim regions, and (iii) synthesizes deep, directional nulls using fast rim-weight optimization algorithms. Beyond baseline serial greedy and greedy bit-flip methods, additional files support advanced weight optimization algorithms including simulated annealing and majorization-minimization operating over higher-order complex weight alphabets, enabling deeper null formation. Interference power from satellites is estimated using free-space path loss and an FCC-derived Starlink EIRP versus steering-angle model, and event-level throughput for each satellite is computed using Shannon capacity. Results show simple binary rim control achieves about 40-55 dB of average interference suppression, while advanced optimization methods can exceed 65-70 dB under favorable geometries, with best-case received interference below -220 dBm. We compare no mitigation, satellite muting, and rim-based spatial nulling, showing rim-based nulling approaches muting-level suppression while preserving throughput close to the no-mitigation case. These results highlight both the scalability of rim-based reflector reconfiguration and the fundamental limitation when satellites cross the main lobe. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_17016 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | SatTrack: Software for Evaluating Satellite Interference and Rim-Based Interference Mitigation Using a Reconfigurable Parabolic Antenna Santana, J. M. Heller, L. Buehrer, R. M. Instrumentation and Methods for Astrophysics Large Low Earth Orbit (LEO) constellations (e.g., Starlink and Iridium) significantly increase the likelihood of transient, high-power interference events at ground receivers. This report presents SatTrack, a GUI-driven simulation framework that (i) tracks satellite motion relative to a fixed antenna boresight, (ii) predicts reflector gain patterns of a parabolic reflector antenna with a reconfigurable rim of specified size using a physical optics (PO) surface-current model decomposed into fixed and reconfigurable rim regions, and (iii) synthesizes deep, directional nulls using fast rim-weight optimization algorithms. Beyond baseline serial greedy and greedy bit-flip methods, additional files support advanced weight optimization algorithms including simulated annealing and majorization-minimization operating over higher-order complex weight alphabets, enabling deeper null formation. Interference power from satellites is estimated using free-space path loss and an FCC-derived Starlink EIRP versus steering-angle model, and event-level throughput for each satellite is computed using Shannon capacity. Results show simple binary rim control achieves about 40-55 dB of average interference suppression, while advanced optimization methods can exceed 65-70 dB under favorable geometries, with best-case received interference below -220 dBm. We compare no mitigation, satellite muting, and rim-based spatial nulling, showing rim-based nulling approaches muting-level suppression while preserving throughput close to the no-mitigation case. These results highlight both the scalability of rim-based reflector reconfiguration and the fundamental limitation when satellites cross the main lobe. |
| title | SatTrack: Software for Evaluating Satellite Interference and Rim-Based Interference Mitigation Using a Reconfigurable Parabolic Antenna |
| topic | Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2512.17016 |