Owing to its large aperture and advanced receivers,research plans for the Qitai 110 m radio telescope(QTT)include a variety of spectral line scientific studies.Sequential construction of receiver systems and multidisc...Owing to its large aperture and advanced receivers,research plans for the Qitai 110 m radio telescope(QTT)include a variety of spectral line scientific studies.Sequential construction of receiver systems and multidisciplinary planning require overcoming serious challenges to spectral line digital backend development,notably to digitize,process,and transmit considerable quantities of observational data,to minimize time-to-science with an easily scalable architecture,and to provide robust,high-quality data.As a proof-of-concept for the QTT backend,here we implement a baseband spectral line digital backend with a SNAP+GPU architecture.The SNAP-based digital frontend comprises two digitization links(1000 MHz,8-bit),two parallel quad-channel preprocessing modules,a quantization module,and a finite-state packaging module,generating a 100-MHz bandwidth digital link from the original analog signal through high-speed Ethernet transmission.The GPU node receives preprocessed baseband packets,constructs a ring buffer for lossless unpacking and distributing,with real-time data reception and caching,and conducts real-time spectral analysis(frequency resolution:3.051 kHz)of the 100 MHz baseband data.We evaluated system performance experimentally using spectral line observations with the Nanshan 26-m radio telescope(NSRT).For the QTT,the SNAP digital frontend will be seamlessly migrated to a radio frequency system-on-chip(RFSoC)architecture,resulting in five-and tenfold increases in instantaneous bandwidth and data throughput,respectively.The low-coupling digital frontend and GPU node can be easily extended to multiple nodes.展开更多
在现代火电厂生产中,分布式控制系统(Distributed Control System,DCS)通过对各个子系统的协调和优化控制,确保发电过程的高效、安全与稳定。5G凭借高速率、低延迟及广连接性等特点,为火电厂DCS后台控制系统的改进带来新的可能。通过探...在现代火电厂生产中,分布式控制系统(Distributed Control System,DCS)通过对各个子系统的协调和优化控制,确保发电过程的高效、安全与稳定。5G凭借高速率、低延迟及广连接性等特点,为火电厂DCS后台控制系统的改进带来新的可能。通过探讨基于5G的火电厂DCS后台控制系统的设计与实现,介绍该系统的架构、数据传输与监控机制以及性能评估,证实5G能够提高DCS的工作效率和可靠性。通过实际测试证实该系统具有实际应用效果,为今后火电厂控制系统的发展与研究提供一定的科学依据。展开更多
基金supported by the “Light in China’s Western Region” program (2022-XBQNXZ012)by the National Natural Science Foundation of China(12073067)
文摘Owing to its large aperture and advanced receivers,research plans for the Qitai 110 m radio telescope(QTT)include a variety of spectral line scientific studies.Sequential construction of receiver systems and multidisciplinary planning require overcoming serious challenges to spectral line digital backend development,notably to digitize,process,and transmit considerable quantities of observational data,to minimize time-to-science with an easily scalable architecture,and to provide robust,high-quality data.As a proof-of-concept for the QTT backend,here we implement a baseband spectral line digital backend with a SNAP+GPU architecture.The SNAP-based digital frontend comprises two digitization links(1000 MHz,8-bit),two parallel quad-channel preprocessing modules,a quantization module,and a finite-state packaging module,generating a 100-MHz bandwidth digital link from the original analog signal through high-speed Ethernet transmission.The GPU node receives preprocessed baseband packets,constructs a ring buffer for lossless unpacking and distributing,with real-time data reception and caching,and conducts real-time spectral analysis(frequency resolution:3.051 kHz)of the 100 MHz baseband data.We evaluated system performance experimentally using spectral line observations with the Nanshan 26-m radio telescope(NSRT).For the QTT,the SNAP digital frontend will be seamlessly migrated to a radio frequency system-on-chip(RFSoC)architecture,resulting in five-and tenfold increases in instantaneous bandwidth and data throughput,respectively.The low-coupling digital frontend and GPU node can be easily extended to multiple nodes.
文摘在现代火电厂生产中,分布式控制系统(Distributed Control System,DCS)通过对各个子系统的协调和优化控制,确保发电过程的高效、安全与稳定。5G凭借高速率、低延迟及广连接性等特点,为火电厂DCS后台控制系统的改进带来新的可能。通过探讨基于5G的火电厂DCS后台控制系统的设计与实现,介绍该系统的架构、数据传输与监控机制以及性能评估,证实5G能够提高DCS的工作效率和可靠性。通过实际测试证实该系统具有实际应用效果,为今后火电厂控制系统的发展与研究提供一定的科学依据。
