KMS of Xinjiang Astronomical Observatory, CAS
| 射电天文台站电磁干扰诊断及评估方法研究 | |
| Alternative Title | Research on Diagnosis and Evaluation Method of Electromagnetic Interference for Radio Astronomy Station |
袁力
| |
| Subtype | 硕士 |
| Thesis Advisor | 孙正文 |
| 2018-06 | |
| Degree Grantor | 中国科学院大学 |
| Place of Conferral | 北京 |
| Degree Name | 理学硕士 |
| Degree Discipline | 天文技术与方法 |
| Keyword | 射电天文 电磁干扰 信号检测 干扰评估 |
| Abstract | 随着无线电业务的高速发展以及电子与通信设备的不断增加，射电天文台站周围的电磁环境变得越来越复杂。电磁干扰信号通过射电望远镜的主波束或者旁瓣进入接收机系统，恶化了天文观测数据，增加了天文观测时间，威胁了射电天文观测。为有效评估电磁干扰的对射电天文观测的影响，本文将射电天文台站电磁干扰分为台站外部干扰和台站内部干扰，针对两种不同类型的电磁干扰源，进行如下的研究与分析： 1）针对射电天文台站外部的无线电业务进行了调研与分析。首先，统计了新疆天文台射电天文业务的频率分配情况，介绍了新疆天文台南山26米望远镜接收机技术参数及观测需求。其次，调研了无线电频率分配及其应用业务，对射电天文观测影响较大的频段内主要无线电业务的频率使用情况进行了统计，保证台站外电磁干扰分析有据可依。 2）分析了射电天文台站设备区域电磁干扰对射电天文观测的影响。首先，提出了一种设备区域电磁干扰检测与识别方法，通过信噪分离、信号识别及信号相关性分析，有效去除环境电磁干扰对测量结果的贡献，并结合南山观测站的数据分析验证了方法的可行性。其次，针对设备区域检测与识别出的电磁干扰信号，结合望远镜平台测试数据进行评估分析，评估分析了设备区域电磁干扰对射电天文观测的影响。 3）基于设备区域电磁干扰检测与识别方法，开发了一套设备区域电磁干扰检测软件。首先，依据现场环境电磁干扰检测及识别流程，结合电磁干扰测试的硬件系统，通过软件需求分断，设计了软件开发流程。其次，依据各个功能模块的工作流程，完成软件界面设计、程序开发与调试。最后，结合测量系统，通过实测验证了软件的可行性。 |
| Other Abstract | With the rapid development of radio services and the increasing number of electronic and communications equipment, the electromagnetic environment around radio astronomical stations has become more and more complex. Electromagnetic interference enters the receiver system through the main beam or side lobe of the radio telescope. It worsens the astronomical observation data, increases the astronomical observation time, and threatens the radio astronomy observation service. In order to effectively evaluate the influence of electromagnetic interference on radio astronomy observation, the electromagnetic interference of radio astronomical observatory station was divided into external interference and intemal interference, and the following research and analysis were performed for the electromagnetic interference sources: 1) The radio service outside the radio astronomy station was investigated and analyzed. First of all, the frequency distribution of the radio astronomy service of the Xinjiang Observatory was counted, and the technical parameters and the observation requirements of the receiver of the Nanshan 26 meter telescope in the Xinjiang Observatory were introduced. Secondly, the radio frequency distribution and its application service were investigated, and the frequency usage of the main radio services in the radio astronomical observation was analyzed, and the analysis of the electromagnetic interference outside the station could be ensured. 2) The influence of electromagnetic interference in radio astronomical observatory on the radio astronomical observation was analyzed. First,a method of detection and recognition of electromagnetic interference in equipment area was proposed. By means of signal noise separation, signal recognition and signal corelation analysis, the contribution of environmental electromagnetic interference to the measurement results could be effectively removed, and the feasibility of the method was verified by the data analysis of Nanshan observation station. Secondly, the influence of electromagnetic interference on radio astronomy observation in equipment area was evaluated and analyzed in view of the electromagnetic interference signals detected and identified in the equipment area and the test data on the radio telescope. 3) Based on the method of equipment area electromagnetic interference detection and recognition,a set of equipment area electromagnetic interference detection software was developed. First, according to the field environment electromagnetic interference detection and identification process, combined with the hardware system of electromagnetic interference testing, the software development process was designed through the software requirement analysis. Secondly, according to the workflow of each fumctional module, we completed the software interface design, program development and debugging. Finally, combined with the measurement system, the feasibility of the software was verified by measurement. |
| Pages | 73 |
| Language | 中文 |
| Document Type | 学位论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/2479 |
| Collection | 研究生学位论文 |
| Affiliation | 中国科学院新疆天文台 |
| First Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | 袁力. 射电天文台站电磁干扰诊断及评估方法研究[D]. 北京. 中国科学院大学,2018. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 学位论文-袁力.pdf（2633KB） | 学位论文 | 暂不开放 | CC BY-NC-SA | Application Full Text | ||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment