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| 1 | The design and implementation of a ROACH2+GPU based correlator on the Tianlai dish array显示文摘A digital correlator is a crucial element in a modern radio telescope.In this paper,we describe a scalable design for the correlator system of the Tianlai pathfinder array,which is an experiment dedicated to testing key technologies for conducting a 21cm intensity mapping survey.The correlator implements the FX design,which firstly performs a fast Fourier transform(FFT) including polyphase filter bank(PFB) computation using a Collaboration for Astronomy Signal Processing and Electronics Research(CASPER) Reconfigurable Open Architecture Computing Hardware-2(ROACH2) board,then computes cross-correlations by employing Graphics Processing Units(GPUs).The design has been tested both in laboratory and in actual observation. | Chen-Hui Niu Qun-Xiong Wang David MacMahon Feng-Quan Wu Xue-Lei Chen Ji-Xia Li Hai-Jun Tian Guillaume Shippee Dan Werthimer Xiao-Ping Zheng | 2019 | Research in Astronomy and Astrophysics2019，19，7： | 2 |
| 2 | SETI@home:Massively distributed computing for SETI显示文摘 | E Korpela D Werthimer D Anderson | 2001 | IEEE Computational Science and Engineering2001，3，1： | 1 |
| 3 | Trial of the combination of mitonyicia , Vindesine and cisplatin in patients with advanced non-small cell lung cancer 显示文摘 | Kris MG Gralla KJ Werthim | 1986 | Cancer Treat Rep1986，70，9： | 1 |
| 4 | SETI@home:Massively distributed computing for SETI显示文摘 | Korpela E Werthimer D Anderson D | 2001 | IEEE Computational Science and Engineering2001，3，： | 1 |
| 5 | SETI@home:Massively Distributed Computing for SETI显示文摘 | D Werthimer | 2001 | Computing in science and Engineering2001，3，1： | 1 |
| 6 | Opportunities to search for extraterrestrial intelligence with the FAST显示文摘The discovery of ubiquitous habitable extrasolar planets,combined with revolutionary advances in instrumentation and observational capabilities,has ushered in a renaissance in the search for extraterrestrial intelligence(SETI).Large scale SETI activities are now underway at numerous international facilities.The Five-hundred-meter Aperture Spherical radio Telescope(FAST)is the largest single-aperture radio telescope in the world,and is well positioned to conduct sensitive searches for radio emission indicative of exo-intelligence.SETI is one of the five key science goals specified in the original FAST project plan.A collaboration with the Breakthrough Listen Initiative was initiated in 2016 with a joint statement signed both by Dr.Jun Yan,the then director of National Astronomical Observatories,Chinese Academy of Sciences(NAOC),and Dr.Peter Worden,Chairman of the Breakthrough Prize Foundation.In this paper,we highlight some of the unique features of FAST that will allow for novel SETI observations.We identify and describe three different signal types indicative of a technological source,namely,narrow band,wide-band artificially dispersed and modulated signals.Here,we propose observations with FAST to achieve sensitivities never before explored.For nearby exoplanets,such as TESS targets,FAST will be sensitive to an EIRP of 1.9×1011 W,well within the reach of current human technology.For the Andromeda Galaxy,FAST will be able to detect any Kardashev type II or more advanced civilization there. | Di Li Vishal Gajjar Pei Wang Andrew Siemion Zhi-Song Zhang Hai-Yan Zhang You-Ling Yue Yan Zhu Cheng-Jin Jin Shi-Yu Li Sabrina Berger Bryan Brzycki Jeff Cobb Steve Croft Daniel Czech David DeBoer Julia DeMarines Jamie Drew J.Emilio Enriquez Nectaria Gizani Eric J.Korpela Howard Isaacson Matthew Lebofsky Brian Lacki David H.E.MacMahon Morgan Nanez Chen-Hui Niu Xin Pei Danny C.Price Dan Werthimer Pete Worden Yunfan Gerry Zhang Tong-Jie Zhang FAST Collaboration | 2020 | Research in Astronomy and Astrophysics2020，20，5： | 1 |
| 7 | SETI@home:massively distributed computing for SETI显示文摘 | Korpela E Werthimer D Anderson D P | 2001 | Computing in Science & Engineering2001，3，1： | 1 |
| 8 | SETI@ HOME-Massively distributed computing for SETI显示文摘 | Korpela Eric Werthimer Dan Anderson David | 2001 | Computing in Science and Engineering2001，3，1： | 1 |
| 9 | SETI@home: An Experiment in Public-resource Computing显示文摘 | Anderson D P Cobb J Korpela E Werthimer | 2002 | Communications of the ACM2002，45，11： | 1 |
| 10 | SETI @ home: Massively distributed computing for SET/显示文摘 | KORPELA E WERTHIMER D ANDERSON D | 2001 | Computing in Science and Engineering2001，3，1： | 1 |
| 11 | Design of RFSoC-based Digital Phased Array Feed(PAF)and Hybrid Architecture Beamforming System显示文摘As the number of array elements and bandwidth increase,the design challenges of the Phased Array Feed(PAF)front-end and its signal processing system increase.Aiming at the ng-PAF of the 110 m radio telescope,this article introduces the concept of fully digital receivers and attempts to use Radio Frequency System-on-Chip(RFSo C)technology to digitize close to the feed array,reduce the complexity and analog components of the front-end,and improve the fidelity of the signals.The article discusses the digital beamforming topology and designs a PAF signal processing experimental system based on RFSo C+GPU hybrid architecture.The system adopts a ZCU111board to design RF-direct digitization and preprocessing front-end,which can sample eight signals up to 2.048GSPS,12 bit,channelize the signals into 1024 chunks,then reorder into four data streams and select one of the 256MHz frequency bands to output through four 10 Gb links.A GPU server is equipped with four RTX 3090 GPUs running four HRBF_HASHPIPE instances,each receiving a 64 MHz bandwidth signal for high-throughput realtime beamforming.The experimental system uses a signal generator to emulate Sa-like signals and propagates through rod antennas,which verifies the effectiveness of the beamforming algorithm.Performance tests show that after algorithm optimization,the average processing time for a given 4 ms data is less than 3 ms in the four-GPU parallel processing mode.The RFSo C integrated design shows significant advantages in power consumption and electromagnetic radiation compared with discrete circuits according to the measurement results. | Xin Pei Na Wang Dan Werthimer Xue-Feng Duan Jian Li Toktonur Ergesh Qi Liu Ming-Hui Cai | 2022 | Research in Astronomy and Astrophysics2022，22，4： | 1 |
| 12 | SETI@ home: Massively distributed computing for SETI显示文摘 | KORPELA E WERTHIMER D ANDERSON D | 2001 | Computing in Science and Engineering2001，3，1： | 1 |
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