Fast Butterfly Epoch Folding-Based X-Ray Pulsar Period Estimation With a Few Distorted Profiles
The traditional pulsar period estimation method using a single distorted profile averts multiple epoch folding processes, but still has space for accuracy to improve. To give consideration to both accuracy and computational load, we combine the fast butterfly epoch folding (FBEF) with the single dis...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2020-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/8945227/ |
| _version_ | 1818353442865807360 |
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| author | Jin Liu Lan-Lan Liu Xiao-Lin Ning Ting-Xuan Du Zhi-Wei Kang |
| author_facet | Jin Liu Lan-Lan Liu Xiao-Lin Ning Ting-Xuan Du Zhi-Wei Kang |
| author_sort | Jin Liu |
| collection | DOAJ |
| description | The traditional pulsar period estimation method using a single distorted profile averts multiple epoch folding processes, but still has space for accuracy to improve. To give consideration to both accuracy and computational load, we combine the fast butterfly epoch folding (FBEF) with the single distorted profile (SDP)-based pulsar period estimation, and propose the FBEF-based pulsar period estimation with a few distorted profiles (FBEF-FDP), which merely uses a few epoch folding processes to enhance accuracy sharply. Firstly, the fast butterfly epoch folding is used to produce a few distorted pulsar profiles with different periods. And then the single distorted profile-based pulsar period estimation explores each distorted prolife to provide a corresponding distortion degree. Finally, using these distortion degree values, the nonlinear search method for multiple minimums can get an optimal distortion degree estimation. Besides, we prove that distortion degree estimation errors of different accumulative distorted profiles from the same pulsar photon sequence are incompletely correlated. This is the theorical basis that the distortion degree estimation values from the same pulsar photon sequence can be fitted to obtain more highly accurate distortion degree estimation. The computational complexity demonstrates that the computational load increases with the number of groups. Thus, to ensure the real-time of the FBEF-FDP, the number of groups should not be too large. Simulation results demonstrate that the accuracy of the fast butterfly epoch folding-based pulsar period estimation using a few distorted profiles enhances at the cost of a small computational load. |
| first_indexed | 2024-12-13T19:09:36Z |
| format | Article |
| id | doaj.art-f1d85c90d63d4052ac0b3b29f875f0b8 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-13T19:09:36Z |
| publishDate | 2020-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-f1d85c90d63d4052ac0b3b29f875f0b82022-12-21T23:34:26ZengIEEEIEEE Access2169-35362020-01-0184211421910.1109/ACCESS.2019.29629778945227Fast Butterfly Epoch Folding-Based X-Ray Pulsar Period Estimation With a Few Distorted ProfilesJin Liu0https://orcid.org/0000-0002-1098-722XLan-Lan Liu1https://orcid.org/0000-0002-3414-522XXiao-Lin Ning2https://orcid.org/0000-0003-3563-3601Ting-Xuan Du3https://orcid.org/0000-0001-8674-0189Zhi-Wei Kang4https://orcid.org/0000-0002-3831-1811School of Information Science and Engineering, Wuhan University of Science and Technology, Wuhan, ChinaSchool of Information Science and Engineering, Wuhan University of Science and Technology, Wuhan, ChinaSchool of Instrumentation Science and Opto-Electronics Engineering, Beihang University (BUAA), Beijing, ChinaInternational School, Wuhan University of Science and Technology, Wuhan, ChinaCollege of Computer Science and Electronic Engineering, Hunan University, Changsha, ChinaThe traditional pulsar period estimation method using a single distorted profile averts multiple epoch folding processes, but still has space for accuracy to improve. To give consideration to both accuracy and computational load, we combine the fast butterfly epoch folding (FBEF) with the single distorted profile (SDP)-based pulsar period estimation, and propose the FBEF-based pulsar period estimation with a few distorted profiles (FBEF-FDP), which merely uses a few epoch folding processes to enhance accuracy sharply. Firstly, the fast butterfly epoch folding is used to produce a few distorted pulsar profiles with different periods. And then the single distorted profile-based pulsar period estimation explores each distorted prolife to provide a corresponding distortion degree. Finally, using these distortion degree values, the nonlinear search method for multiple minimums can get an optimal distortion degree estimation. Besides, we prove that distortion degree estimation errors of different accumulative distorted profiles from the same pulsar photon sequence are incompletely correlated. This is the theorical basis that the distortion degree estimation values from the same pulsar photon sequence can be fitted to obtain more highly accurate distortion degree estimation. The computational complexity demonstrates that the computational load increases with the number of groups. Thus, to ensure the real-time of the FBEF-FDP, the number of groups should not be too large. Simulation results demonstrate that the accuracy of the fast butterfly epoch folding-based pulsar period estimation using a few distorted profiles enhances at the cost of a small computational load.https://ieeexplore.ieee.org/document/8945227/Distortion measurementepoch foldingestimationsearch methodsX-ray pulsar |
| spellingShingle | Jin Liu Lan-Lan Liu Xiao-Lin Ning Ting-Xuan Du Zhi-Wei Kang Fast Butterfly Epoch Folding-Based X-Ray Pulsar Period Estimation With a Few Distorted Profiles IEEE Access Distortion measurement epoch folding estimation search methods X-ray pulsar |
| title | Fast Butterfly Epoch Folding-Based X-Ray Pulsar Period Estimation With a Few Distorted Profiles |
| title_full | Fast Butterfly Epoch Folding-Based X-Ray Pulsar Period Estimation With a Few Distorted Profiles |
| title_fullStr | Fast Butterfly Epoch Folding-Based X-Ray Pulsar Period Estimation With a Few Distorted Profiles |
| title_full_unstemmed | Fast Butterfly Epoch Folding-Based X-Ray Pulsar Period Estimation With a Few Distorted Profiles |
| title_short | Fast Butterfly Epoch Folding-Based X-Ray Pulsar Period Estimation With a Few Distorted Profiles |
| title_sort | fast butterfly epoch folding based x ray pulsar period estimation with a few distorted profiles |
| topic | Distortion measurement epoch folding estimation search methods X-ray pulsar |
| url | https://ieeexplore.ieee.org/document/8945227/ |
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