星际通信中的干涉仪测量：方法与观测结果
Interferometer measurements in interstellar communications: methods and observations
AI总结：
本研究利用双单元射电干涉仪与接收算法开展地外通信信号搜索，通过差分到达角等测量提升信号探测能力、降低误报，经61天共244小时观测，为相关研究补充了新的方法与观测数据。
摘要：
据假设，地外通信信号存在于一个广阔的搜索空间中。本文结合通信理论与系统设计原理，研究并实现了可缩小信号搜索空间的方法，同时兼顾有意发射信号的可探测性。本文所报道的设计与观测工作为此前的相关报告（参考文献：arXiv:2105.03727、arXiv:2106.10168、arXiv:2202.12791、arXiv:2203.10065）补充了新内容。在本次研究中，研究人员利用一台双单元射电干涉仪望远镜及接收算法，对Δt-Δf极化脉冲对开展差分到达角与多带宽测量。该系统提升了地外信号的可探测性，同时减少了由噪声和射频干扰导致的信号误报。统计分析采用了覆盖特定天球坐标范围的赤经滤波器，该范围包含此前确定的异常天区方向：赤经5.25±0.15小时，赤纬-7.6±1度。观测持续了61天，累计完成244小时的干涉仪测量。
英文摘要：
Extraterrestrial communication signals are hypothesized to be present in an extensive search space. Using principles of communication theory and system design, methods are studied and implemented to reduce the signal search space, while considering intentional transmitter detectability. The design and observational work reported in this paper adds material to previous related reports. (ref. arXiv:2105.03727, arXiv:2106.10168, arXiv:2202.12791, arXiv:2203.10065). In the current work, a two-element radio interferometer telescope and receiver algorithms are utilized to perform differential angle-of-arrival and multi-bandwidth measurements of delta-t delta-f polarized pulse pairs. The system enhances extraterrestrial signal detectability, while reducing signal false positives caused by noise and radio frequency interference. Statistical analysis utilizes a Right Ascension filter spanning celestial coordinate ranges that include the previously determined anomalous celestial direction: 5.25 +- 0.15 hr Right Ascension, -7.6 degrees +- 1 degree Declination. Observations were conducted during a duration of 61 days, comprising 244 hours of interferometer measurements.
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