论文标题
基于ARPL和Sumthreshold方法的射频干扰缓解措施
Radio Frequency Interference Mitigation based on the ArPLS and SumThreshold Method
论文作者
论文摘要
随着射电望远镜变得敏感，对于射电天文学的有趣信号，射频干扰（RFI）越来越严重。存在开发自动，准确和有效的RFI缓解方法的需求。因此，这项工作研究了RFI检测算法。首先，我们引入了一种不对称重新加权的最小二乘（ARPLS）方法，以更准确地估计基线。删除估计的基线后，根据Sumthreshold算法提出了几种新型策略，用于检测不同类型的RFI。可以自动和自适应确定sumthreshold中的阈值参数。适应性对于减少人类干预和在线RFI处理管道至关重要。快速的应用程序（五百米的光圈球形望远镜）数据表明，基于ARPL和Sumthreshold的拟议方案优于一些有关效率和性能的RFI检测的常规方法。
As radio telescopes become sensitive, radio frequency interference (RFI) is more and more serious for interesting signals of radio astronomy. There exist demands for developing an automatic, accurate and efficient RFI mitigation method. Therefore, this work investigated the RFI detection algorithm. Firstly, we introduced an Asymmetrically Reweighted Penalized Least Squares (ArPLS) method to estimate baseline more accurately. After removing the estimated baseline, several novel strategies were proposed based on the SumThreshold algorithm for detecting different types of RFI. The threshold parameter in the SumThreshold can be determined automatically and adaptively. The adaptiveness is essential for reducing human interventions and the online RFI processing pipeline. Applications to FAST (Five-hundred-meter Aperture Spherical Telescope) data show that the proposed scheme based on the ArPLS and SumThreshold is superior to some typically available methods for RFI detection with respect to efficiency and performance.
