基于四天线阵的无线电干扰源来波方向的测试研究  

Research on Measurement of Radio Interference Source Based on Four-antenna Line Array

作　　者：刘道睿 苗晟 董亮[2] 王晓瑞 田斌 李升阳 郭少杰[2] Liu Daorui;Miao Sheng;Dong Liang;Wang Xiaorui;Tian Bin;Li Shengyang;Guo Shaojie(College of Big Data and Intelligent Engineering,Southwest Forestry University,Kunming 650051,China;Key Laboratory for the Structure and Evolution of Celestial Objects,Chinese Academy of Sciences,Kunming 650216,China;Yunnan Radio Monitoring Center,Kunming 650228,China)

机构地区：[1]西南林业大学大数据与智能工程学院,云南昆明650051 [2]中国科学院天体结构与演化重点实验室,云南昆明650216 [3]云南省无线电监测中心,云南昆明650228

出　　处：《天文研究与技术》2022年第6期552-558,共7页Astronomical Research & Technology

基　　金：国家自然科学基金(U2031133,U1831201,11941003);云南省应用基础研究计划面上项目(2019FB009)资助。

摘　　要：针对射电天文观测中对周边电磁环境宁静区检测方法的不足,提出一种基于四天线阵进行无线电干扰监测的方法,目的在于实时监测电磁宁静区有无干扰源并对干扰源的来波方向进行辨识。采用便携式四天线布成线阵,使用线性阵列的MUSIC算法计算干扰源来波方向。在室内和室外不同距离和条件下的测试结果表明,在相对空旷宁静的环境下,四天线阵能够有效辨识干扰信号的来波方向,测量角度误差不超过5°的可靠性约为87%。经过综合分析,本文得出采用便携式四天线阵方式结合MUSIC算法在空旷区射电天文观测中能够较好辨识干扰源来波方向,有助于帮助射电望远镜避开受干扰信道。Aiming at the deficiency of the detection method of the quiet area of the surrounding electromagnetic environment in radio astronomical observation, this paper proposes a radio interference monitoring method based on four-antenna linear array. The purpose is to monitor whether there are interference sources in the quiet area in real time and identify the incoming direction of the interference sources. The method is to use the portable four-antenna array to form a linear array, and use the MUSIC algorithm of the linear array to calculate the incoming wave direction of the interference source. Through the test under different distances and conditions indoors and outdoors, the results show that in a relatively open and quiet environment, the four-antenna array can effectively identify the incoming direction of the interference signal, and the reliability of the measurement angle error of no more than 5is about 87%. After comprehensive analysis, it is concluded that the portable four-antenna linear array combined with MUSIC algorithm can better identify the direction of the incoming wave of the interference source in the radio astronomical observation in the open area, which can effectively help the radio telescope avoid the disturbed channel.

关 键 词：电磁环境监测 射电天文观测 无线电测向 MUSIC测向技术 

分 类 号：P165[天文地球—天文学]