Design of a multi-function high-speed digital baseband data acquisition system
A multi-function digital baseband data acquisition system is designed for the sampling,distribution and recording of wide-band multi-channel astronomical signals.The system hires a SNAP2 board as a digital baseband converter to digitize,channelize and packetize the received signal.It can be configur...
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Published in | 天文和天体物理学研究 Vol. 21; no. 10; pp. 61 - 72 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Xinjiang Key Laboratory of Microwave Technology,Urumqi 830011,China%Xinjiang Astronomical Observatory,Chinese Academy of Sciences,Urumqi 830011,China
2021
University of Chinese Academy of Sciences,Beijing 100049,China Xinjiang Astronomical Observatory,Chinese Academy of Sciences,Urumqi 830011,China Key Laboratory of Radio Astronomy,Chinese Academy of Sciences,Nanjing 210008,China |
Subjects | |
Online Access | Get full text |
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Summary: | A multi-function digital baseband data acquisition system is designed for the sampling,distribution and recording of wide-band multi-channel astronomical signals.The system hires a SNAP2 board as a digital baseband converter to digitize,channelize and packetize the received signal.It can be configured dynamically from a single channel to eight channels with a maximum bandwidth of 4096 MHz.Eight parallel HASHPIPE instances run on four servers,each carrying two NVMe SSD cards,achieving a total continuous write rate of 8 GB s-1.Data are recorded in the standard VDIF file format.The system is deployed on a 25-meter radio telescope to verify its functionality based on pulsar observations.Our results indicate that during the 30-minute observation period,the system achieved zero data loss at a data recording rate of 1 GB s-1 on a single server.The system will serve as a verification platform for testing the functions of the QTT(QiTai radio Telescope)digital backend system.In addition,it can be used as a baseband/VLBI(Very Long Baseline Interferometry)recorder or D-F-engine of correlator/beamformer as well. |
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ISSN: | 1674-4527 2397-6209 |
DOI: | 10.1088/1674-14527/21/10/248 |