KMS of Xinjiang Astronomical Observatory, CAS
| 关于射电望远镜台址航空信号处理方法的研究 | |
| Alternative Title | A Study of Aeronautical Signal Processing Method for Radio Telescope Station |
许红瑞
| |
| Subtype | 硕士 |
| Thesis Advisor | 陈卯蒸 |
| 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 | 射电干扰 航空信号 最小二乘法多项式拟合 聚类算法 |
| Abstract | 射电天文台址空间航线航空设备电磁干扰对射电天文观测存在潜在威胁，统计台址航线航班流量特征，分析其电磁干扰对射电天文观测的影响，为台址干扰缓解策略提供依据。本课题针对民航ADS-B（Automatic Dependent Surveillance-Broadcast）信号，研究其信号测量、航班流量特征统计方法。 首先，依据ADS-B信号特征，采用USRP（Universal Software Radio Peripheral）软件无线电平台，结合GNU Radio程序开发环境，搭建了ADS-B信号监测系统，给出了监测系统测量及关键参数设置流程。该监测系统安装于新疆天文台本部，针对航线航班流量信息进行监测，并对数据样本特征及数据格式进行描述。 提出了一种基于最小二乘法多项式拟合和聚类算法划定高峰时段航迹分布范围的方法。通过最小二乘法多项式拟合，获得航迹样本点在时间上的分布趋势和高峰时段。对高峰时段的航迹样本点进行聚类分析，得到各高峰时段样本点空间分布范围。采用相同方法对验证数据样本点进行聚类分析，计算航迹分布在己划定区域范围内的概率，验证了方法的有效性。 最后，依据航班位置信息数据，统计了飞机到测站距离随时间的分布情况，初步分析了航空信号对射电天文观测的影响。 |
| Other Abstract | The electromagnetic interference of aerial equipment at the site of radio astronomy observatory has a potential threat to radio astronomy observation This topic studies the signal statistics and the characteristics of flight flow statistics for civil aviation ADS-B(Automatic Dependent Surveillance-Broadcast) signals. First, according to the characteristics of ADS-B signal, using USRP(Universal Software Radio Peripheral) software radio platform and the development environment of GNU Radio program,a ADS-B signal monitoring system is set up, and the measurement of monitoring system and the process of setting key parameters are given. The monitoring system is installed in the Xinjiang Observatory, which monitors the infomation of airline flights and describes the data sample characteristics and data fomats. A method based on least squares polynomial fitting and clustering algorithm is proposed to delineate the distribution range of peak hours. Through the least square polynomial fitting, the distribution trend and high time interval of track sample pointsare obtained. Cluster analysis was carried out on the track sample points at peak hours, and the spatial distribution range of sample points in each peak period was obtained. By using the same method, cluster analysis is carried out to verify the data sample points, and the probability of track distribution in the designated area is calculated, which verifies the effectiveness of the method. Finally, according to the infomation of flight location information, the distribution of the distance of the aircraft to the station is statistically analyzed, and the influence of the aviation signal on the radio astronomy observation is preliminarily analyzed. |
| Pages | 54 |
| Language | 中文 |
| Document Type | 学位论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/2481 |
| 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 | 许红瑞. 关于射电望远镜台址航空信号处理方法的研究[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-许红瑞.pdf（2315KB） | 学位论文 | 暂不开放 | CC BY-NC-SA | Application Full Text | ||
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