Research on Channelization Techniques of Radio Astronomical Wideband Signal with Oversampled Polyphase Filter Banks
文献类型：期刊论文
| 作者 | Zhang, Meng2,5,6 ; Zhang, Hai-long1,4,5,6; Zhang, Ya-zhou5,6; Wang, Jie1,6; Guo, Shao-cong3; Meng, Qiao3
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| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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| 出版日期 | 2023-08-01 |
| 卷号 | 23期号:8页码:18 |
| 关键词 | (stars:) pulsars: general methods: analytical miscellaneous methods: data analysis |
| ISSN号 | 1674-4527 |
| DOI | 10.1088/1674-4527/acd73b |
| 通讯作者 | Zhang, Hai-long(zhanghailong@xao.ac.cn) |
| 英文摘要 | Digital channelization decomposes a wideband signal into multiple adjacent sub-bands using Parallel Technology. Channelization can effectively reduce the pressure on the radio astronomy digital backends system and make wideband signal processing possible. Aiming at the problems of signal attenuation at sub-band edge, spectral leakage and aliasing encountered in wideband signal channelization, algorithms to reduce the problems are studied. We design a Critically Sampled Polyphase Filter Bank (CS-PFB) based on the Finite Impulse Response digital filter with a Hamming Window and systematically analyze the frequency response characteristics of the CS-PFB. Based on the channelized structure of the CS-PFB, an OverSampled Polyphase Filter Bank (OS-PFB) is designed by data reuse, and the filtering frequency response characteristics of CS-PFB and OS-PFB are compared and analyzed. Using the wideband baseband data generated by the CASPSR (Collaboration for Astronomy Signal processing and electronics research Parkes Swinburne Recorder), we implement sub-band division and 16-band output of these data based on the 2x oversampling OS-PFB, and the problem of spectrum inversion in the sub-bands is corrected. After removing 25% of redundant data in the head and tail of each sub-band, we recombine the sub-bands into a wideband. The wideband signal is almost identical to the original observed signal. Therefore, the experimental results show that the OS-PFB can improve the channel response. For the 400 MHz baseband data of J0437-4715, we compare the pulse profile obtained from the original baseband data with the pulse profile obtained after the channelization and recombination. The phase and amplitude information of the pulse profiles are consistent, which verifies the correctness of our channelization algorithm. |
| WOS关键词 | DESIGN |
| 资助项目 | National Key Ramp;D Program of China[2021YFC2203502] ; National Key Ramp;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] ; Tianshan Talent Project of Xinjiang Uygur Autonomous Region[2022TSYCCX0095] ; Scientific Instrument Developing Project of the Chinese Academy of Sciences[PTYQ2022YZZD01] ; Operation, Maintenance and Upgrading Fund for Astronomical Telescopes and Facility Instruments ; Ministry of Finance of China ; Natural Science Foundation of Xinjiang Uygur Autonomous Region[2022D01A360] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001025410000001 |
| 出版者 | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
| 资助机构 | National Key Ramp;D Program of China ; National Natural Science Foundation of China (NSFC) ; Tianshan Innovation Team Plan of Xinjiang Uygur Autonomous Region ; Tianshan Talent Project 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 ; Ministry of Finance of China ; Natural Science Foundation of Xinjiang Uygur Autonomous Region |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/5331]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Zhang, Hai-long |
| 作者单位 | 1.Natl Astron Data Ctr, Beijing 100101, Peoples R China 2.Qufu Normal Univ, Sch Cyber Sci & Engn, Qufu 273165, Peoples R China 3.Southeast Univ, Sch Informat Sci & Engn, Nanjing 211100, Peoples R China 4.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 6.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Meng,Zhang, Hai-long,Zhang, Ya-zhou,et al. Research on Channelization Techniques of Radio Astronomical Wideband Signal with Oversampled Polyphase Filter Banks[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2023,23(8):18. |
| APA | Zhang, Meng,Zhang, Hai-long,Zhang, Ya-zhou,Wang, Jie,Guo, Shao-cong,&Meng, Qiao.(2023).Research on Channelization Techniques of Radio Astronomical Wideband Signal with Oversampled Polyphase Filter Banks.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,23(8),18. |
| MLA | Zhang, Meng,et al."Research on Channelization Techniques of Radio Astronomical Wideband Signal with Oversampled Polyphase Filter Banks".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 23.8(2023):18. |
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来源：新疆天文台
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