Research on a Coherent Dedispersion Algorithm for Pulsar Baseband Data
文献类型：期刊论文
| 作者 | Zhang, Hai-Long2,3,4,5 ; Zhang, Ya-Zhou4,5; Zhang, Meng4,5; Wang, Jie2,5; Zhang, Ting1; Wang, Shuang-Qiang5; Yuan, Jian-ping5; Ye, Xin-Chen2,4,5; Li, Jian5
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| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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| 出版日期 | 2023 |
| 卷号 | 23期号:1页码:11 |
| ISSN号 | 1674-4527 |
| 关键词 | pulsar: coherent dedispersion: baseband data: pulse profile |
| DOI | 10.1088/1674-4527/aca8ee |
| 通讯作者 | Zhang, Hai-Long(zhanghailong@xao.ac.cn) |
| 英文摘要 | When the pulsar signal propagates in the interstellar medium (ISM), the high frequency and low frequency components of the signal reach the radio telescope with a certain delay. Therefore, the pulsar signal will appear energy dispersion, which will broaden the pulse profile, decrease the signal to noise ratio, and even lead to the disappearance of the pulse signal. In this paper, we analyze the sampling, polarization and arrangement of baseband data based on the coherent dedispersion algorithm for the problem of pulsar baseband data dedispersion. We systematically study the coherent dedispersion data processing procedure, and test the pulse profile changes under different FFT block sizes. An optimal selection strategy of FFT block sizes is proposed for reducing the operation time and obtaining a better pulse profile. We propose two methods, one is the generation of ISM transfer function, the other is the pulsar period and phase prediction method at a certain time, and discuss integral and folding strategies. We test the algorithm based on the baseband data of CASPSR and Medusa terminals observed by the Parkes 64 m radio telescope, and analyze the reading and processing methods of baseband data of different terminals. The experimental results show that the phase and amplitude information of the pulse profile processed by our algorithm is basically consistent with the results obtained by DSPSR. |
| 资助项目 | National Key R&D Program of China[2021YFC2203502] ; National Key R&D Program of China[2022YFF0711502] ; National Natural Science Foundation of China (NSFC)[12173077] ; National Natural Science Foundation of China (NSFC)[12003062] ; Tianshan Innovation Team Plan of Xinjiang Uygur Autonomous Region[2022D14020] ; Scientific Instrument Developing Project of the Chinese Academy of Sciences[PTYQ2022YZZD01] ; Operation, Maintenance and Upgrading Fund for Astronomical Telescopes and Facility Instruments ; Natural Science Foundation of Xinjiang Uygur Autonomous Region[2022D01A360] ; Big Data Joint Research Center |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
| WOS记录号 | WOS:000916481300001 |
| 资助机构 | National Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; Tianshan Innovation Team Plan of Xinjiang Uygur Autonomous Region ; Scientific Instrument Developing Project of the Chinese Academy of Sciences ; Operation, Maintenance and Upgrading Fund for Astronomical Telescopes and Facility Instruments ; Natural Science Foundation of Xinjiang Uygur Autonomous Region ; Big Data Joint Research Center |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/5066]  |
| 专题 | 新疆天文台_计算机技术室 |
| 通讯作者 | Zhang, Hai-Long |
| 作者单位 | 1.China West Normal Univ, Coll Phys & Astron, Nanchong 637002, Peoples R China 2.Natl Astron Data Ctr, Beijing 100101, Peoples R China 3.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Hai-Long,Zhang, Ya-Zhou,Zhang, Meng,et al. Research on a Coherent Dedispersion Algorithm for Pulsar Baseband Data[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2023,23(1):11. |
| APA | Zhang, Hai-Long.,Zhang, Ya-Zhou.,Zhang, Meng.,Wang, Jie.,Zhang, Ting.,...&Li, Jian.(2023).Research on a Coherent Dedispersion Algorithm for Pulsar Baseband Data.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,23(1),11. |
| MLA | Zhang, Hai-Long,et al."Research on a Coherent Dedispersion Algorithm for Pulsar Baseband Data".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 23.1(2023):11. |
入库方式： OAI收割
来源：新疆天文台
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