A Wavelet-Integrated Search Pipeline for Narrowband Technosignatures in FAST Observations of 33 Exoplanet Systems
Abstract
Building on prior FAST targeted and blind SETI campaigns toward 33 exoplanet systems, we introduce a wavelet-integrated search pipeline for narrowband technosignature candidates in radio dynamic spectra. At its core, the pipeline uses a Multi-Scale Wavelet Net (MSWNet) to produce an interpretable multi-resolution representation, followed by a lightweight parameter estimator for endpoint localization. Rather than relying solely on hard-threshold drift searches, the pipeline reframes narrowband detection as wavelet-guided feature extraction followed by endpoint regression, morphology-aware filtering, raw-data S/N validation, and multi-beam anticoincidence veto. Applied to real FAST data, the pipeline recovers representative events from prior analyses and produces a compact set of veto-ready candidates for downstream inspection. The resulting workflow preserves interpretability, low regression complexity, and auditable threshold control, making it readily transferable to other radio surveys and large-scale technosignature searches.
Versions
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BibTeX
@misc{li2026waveletintegrated,
title = {{A Wavelet-Integrated Search Pipeline for Narrowband Technosignatures in FAST Observations of 33 Exoplanet Systems}},
author = {Zi-Qi Li and Jian-Kang Li and Zhe-Wei Luo and Chen-Xu Guan and Yu-Tong Fan and Zhen-Zhao Tao and Xiao-Hang Luan and Bo-Lun Huang and Yu Hu and Peng-Yu Li and Pu-Fan Liu and Kang Jiao and Tong-Jie Zhang and Hai-Yan Zhang and Peng Jiang and Rui Li and Liang Gao},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2605.23739},
eprint = {2605.23739},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2605.23739},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - A Wavelet-Integrated Search Pipeline for Narrowband Technosignatures in FAST Observations of 33 Exoplanet Systems
AU - Zi-Qi Li
AU - Jian-Kang Li
AU - Zhe-Wei Luo
AU - Chen-Xu Guan
AU - Yu-Tong Fan
AU - Zhen-Zhao Tao
AU - Xiao-Hang Luan
AU - Bo-Lun Huang
AU - Yu Hu
AU - Peng-Yu Li
AU - Pu-Fan Liu
AU - Kang Jiao
AU - Tong-Jie Zhang
AU - Hai-Yan Zhang
AU - Peng Jiang
AU - Rui Li
AU - Liang Gao
PY - 2026
DA - 2026/09/18
PB - arXiv
DO - 10.48550/arxiv.2605.23739
UR - https://arxiv.org/abs/2605.23739
AB - Building on prior FAST targeted and blind SETI campaigns toward 33 exoplanet systems, we introduce a wavelet-integrated search pipeline for narrowband technosignature candidates in radio dynamic spectra. At its core, the pipeline uses a Multi-Scale Wavelet Net (MSWNet) to produce an interpretable multi-resolution representation, followed by a lightweight parameter estimator for endpoint localization. Rather than relying solely on hard-threshold drift searches, the pipeline reframes narrowband detection as wavelet-guided feature extraction followed by endpoint regression, morphology-aware filtering, raw-data S/N validation, and multi-beam anticoincidence veto. Applied to real FAST data, the pipeline recovers representative events from prior analyses and produces a compact set of veto-ready candidates for downstream inspection. The resulting workflow preserves interpretability, low regression complexity, and auditable threshold control, making it readily transferable to other radio surveys and large-scale technosignature searches.
ER -