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ORIGINAL RESEARCH article
Front. Astron. Space Sci.
Sec. Astronomical Instrumentation
Volume 11 - 2024 |
doi: 10.3389/fspas.2024.1407870
This article is part of the Research Topic New Telescope Advances with Novel Techniques View all 10 articles
Design and Implementation of a Scalable Correlator Based on ROACH2+GPU Cluster for Tianlai 96-Dual-Polarization Antenna Array
Provisionally accepted
Zhao Wang
1
Ji-Xia Li
2*
Ke Zhang
1*
Feng-Quan Wu
2*
Haijun Tian
3*
Chen-Hui Niu
4*
Ju-Yong Zhang
3*
Zhi-Ping Chen
3*
Dong-Jin Yu
3*
Xue-Lei Chen
2*- 1 China Three Gorges University, Yichang, Hubei Province, China
- 2 National Astronomical Observatories, Chinese Academy of Sciences (CAS), Beijing, Beijing Municipality, China
- 3 Hangzhou Dianzi University, Hangzhou, China
- 4 Central China Normal University, Wuhan, Hubei Province, China
The digital correlator is one of the most crucial data processing components of a radio telescope array. With the scale of radio interferometeric array growing, many efforts have been devoted to developing a cost-effective and scalable correlator in the field of radio astronomy. In this paper, a 192-input digital correlator with six CASPER ROACH2 boards and seven GPU servers has been deployed as the digital signal processing system for Tianlai cylinder pathfinder located in Hongliuxia observatory. The correlator consists of 192 input signals (96 dual-polarization), 125-MHz bandwidth, and full-Stokes output. The correlator inherits the advantages of the CASPER system, for example, low cost, high performance, scalability of modulars modular scalability, and a heterogeneous computing architecture. With a rapidly deployable ROACH2 digital sampling system, a commercially exspandable expandable 10 Gigabit switching network system, and a flexible upgradable GPU computing system, the correlator forms a low-cost and easily-upgradable system, facing toward poised to support scalable large-scale interferometeric array in the future.
Keywords: techniques, interferometric; instrumentation, Interferometers, Radio telescope, Digital correlators
Received: 27 Mar 2024; Accepted: 25 Jun 2024.
Copyright: © 2024 Wang, Li, Zhang, Wu, Tian, Niu, Zhang, Chen, Yu and Chen. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Ji-Xia Li, National Astronomical Observatories, Chinese Academy of Sciences (CAS), Beijing, Beijing Municipality, China
Ke Zhang, China Three Gorges University, Yichang, 443002, Hubei Province, China
Feng-Quan Wu, National Astronomical Observatories, Chinese Academy of Sciences (CAS), Beijing, Beijing Municipality, China
Haijun Tian, Hangzhou Dianzi University, Hangzhou, China
Chen-Hui Niu, Central China Normal University, Wuhan, 430079, Hubei Province, China
Ju-Yong Zhang, Hangzhou Dianzi University, Hangzhou, China
Zhi-Ping Chen, Hangzhou Dianzi University, Hangzhou, China
Dong-Jin Yu, Hangzhou Dianzi University, Hangzhou, China
Xue-Lei Chen, National Astronomical Observatories, Chinese Academy of Sciences (CAS), Beijing, Beijing Municipality, China
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