电讯技术2016，Vol.56Issue(9)：956-962,7.DOI:10.3969/j.issn.1001-893x.2016.09.002
基于SKA1-low的数字波束形成技术
Digital Beamforming Techniques Based on SKA1-low
摘要
Abstract
In order to coordinate China’ s participation in Square Kilometre Array( SKA) and gain depth un-derstanding of radio interferometry and data processing algorithm based on digital beamforming,the polyphase filter bank channels based digital phase shift and the fractional delay filter based digital beamforming algo-rithms are proposed in this paper. The former algorithm solves the phase shift amount by using a cross-corre-lation method to improve the beam pointing accuracy. The latter algorithm is an effective combination of tradi-tional algorithm and radio observations theory. Firstly,the principles of the proposed algorithms are derived and the advantages and drawbacks of the two algorithms are analyzed. Secondly,the simulation results are shown to verify the correctness of the proposed algorithms. Simulation results indicate that the proposed poly-phase filter bank channels based digital phase shift beamforming has certain advantages in comparison with traditional algorithm. Finally,the effect of delay filter of different orders on beamforming is also analyzed. These simulation results and conclusions will provide reference for the researchers of SKA project.关键词
平方公里射电阵项目/低频阵列/数字波束形成/多相滤波器/分数时延Key words
square kilometre array project/low-frequency array/digital beamforming/polyphase filter/fraction delay分类
信息技术与安全科学引用本文复制引用
劳保强,安涛,郭绍光,魏延恒,陆扬,伍筱聪..基于SKA1-low的数字波束形成技术[J].电讯技术,2016,56(9):956-962,7.基金项目
国家重点基础研究发展计划(973计划)项目(2013CB87900) （973计划）
国家自然科学基金资助项目(11403081) （11403081）
天文台站设备更新及重大仪器设备运行专项经费资助项目(587121002) Foundation Item:The National Key Basic Research Program of China(973 Program)(2013CB87900) （587121002）
The National Natural Science Founda-tion of China(No.11403081) （No.11403081）
The Observatory Station Equipment Update and Major Equipment Operation Program of Chi-nese Academy of Sciences(No.587121002) （No.587121002）
