Design of a multi-function high-speed digital baseband data acquisition system

被引：4

作者：

Pei, Xin ^{[1
,2
,3
,4
]}

Li, Jian ^{[1
,3
,4
]}

Wang, Na ^{[1
,3
]}

Ergesh, Toktonur ^{[1
,3
,4
]}

Duan, Xue-Feng ^{[1
,3
,4
]}

Ma, Jun ^{[1
,3
,4
]}

Chen, Mao-Zheng ^{[1
,3
,4
]}

机构：

[1] Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Peoples R China

[4] Xinjiang Key Lab Microwave Technol, Urumqi 830011, Peoples R China

来源：

RESEARCH IN ASTRONOMY AND ASTROPHYSICS | 2021年 / 21卷 / 10期

基金：

中国国家自然科学基金;

关键词：

instrumentation; miscellaneous; techniques; site testing;

D O I：

10.1088/1674-4527/21/10/248

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页数：12

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