发表机构
University of Washington; Dark Universe Science Center（华盛顿大学; 暗宇宙科学中心）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文提出将标准无线电成像作为首个非零累积量的方法，利用累积量成像识别微弱SETI信号与极微弱RFI，解决了偶然无线电通信发射难以探测的问题。
AI 中文摘要
识别地外文明无线电信标的技术已相当成熟，但标准无线电通信产生的偶然宽带发射更难探测，且反直觉的是，随着我们更高效利用无线电频谱，偶然的地球无线电传输反而更难识别。本文研究无线电通信背后的电场统计，并将标准无线电成像重新概念化为首个非零累积量，这使我们得到高阶累积量图像，其中天体物理源的自然随机发射消失，仅留下无线电通信调制源的图像。微弱的SETI和RFI源在这些累积量图像中凸显，可识别当前技术无法探测的微弱通信信号。
英文摘要
Techniques for identifying radio beacons transmitted by extra-terrestrial civilizations are well advanced. However, the casual broadband emission from standard radio communication is much harder to detect, and counter-intuitively casual Earth radio transmissions are becoming more difficult to identify as we more efficiently utilize the radio spectrum. In this paper we examine the electric-field statistics behind radio communication and re-conceptualize standard radio imaging as the first non-zero cumulant. This leads us to images of the higher cumulants where the natural stochastic emission from astrophysical sources disappears, leaving images of only modulated sources of radio communication. Faint SETI and RFI sources stand out in these cumulant images, enabling identification of faint communication that is undetectable with current techniques.
Comments13 pages, 2 figures, 1 table
