Institutional Repository of Computer Application Research Laboratory
| Research on a Coherent Dedispersion Algorithm for Pulsar Baseband Data | |
Zhang, Hai-Long1,2,3,4 ; Zhang, Ya-Zhou1,2; Zhang, Meng1,2; Wang, Jie1,4; Zhang, Ting5; Wang, Shuang-Qiang1; Yuan, Jian-ping1; Ye, Xin-Chen1,2,4; Li, Jian1
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| 2023 | |
| Source Publication | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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| ISSN | 1674-4527 |
| Volume | 23Issue:1Pages:015023 |
| Contribution Rank | 1 |
| Abstract | 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. |
| Keyword | pulsar: coherent dedispersion: baseband data: pulse profile |
| DOI | 10.1088/1674-4527/aca8ee |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000916481300001 |
| Publisher | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
| Funding Organization | 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 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/5067 |
| Collection | 计算机技术应用研究室 110米口径全可动射电望远镜（QTT）_技术成果 射电天文研究室_数字技术实验室 |
| Corresponding Author | Zhang, Hai-Long |
| Affiliation | 1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Peoples R China 4.Natl Astron Data Ctr, Beijing 100101, Peoples R China 5.China West Normal Univ, Coll Phys & Astron, Nanchong 637002, Peoples R China |
| First Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Corresponding Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation 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):015023. |
| 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),015023. |
| MLA | Zhang, Hai-Long,et al."Research on a Coherent Dedispersion Algorithm for Pulsar Baseband Data".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 23.1(2023):015023. |
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| Zhang-2023-Research （1249KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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