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FAST数字后端及超宽带百万通道频谱仪算法仿真
张夏; 俞欣颖; 段然; 李菂; 蒿杰; 金乘进
Source Publication天文学进展
2016
Volume34Issue:2Pages:249-257
Other AbstractAbstract: The National Astronomical Observatories of the Chinese Academy of Sciences
(NAOC) will soon ¯nish the Five-hundred-meter Aperture Spherical Radio Telescope (FAST),
which will be the most sensitive single-dish radio telescope in the low frequency radio bands
between 70 MHz and 3 GHz. To take advantage of its giant aperture, the ongoing self-
developing brand-new broadband receiver China Recon¯gurable ANalog-Digital backEnd
(CRANE) is expected to ensure that it would achieve the best possible overall performance.
In hardware, CRANE includes developed parts | FAST Digital Backend (FDB), 3
Gbits/s, 12-bit Analog-to-Digital Converter (FAST3212ADC) | and developing part |
Analog Front-end Board (AFB). In its ¯rmware, FPGA-based digital signal processing al-
gorithms such as Digital Down Converter (DDC) and Fast Fourier Transform(FFT) will be
applied to realize channelization on FDB. CRANE plans to build million channel spectrome-
ter which measures a frequency precisely on FDB. We utilize two cascaded FFT to optimize
the FFT for large-scale operation. However, the resolution of the ¯rst FFT unit would cause
the distortion of the output results. The simulation on Matlab shows that ¯nal frequency
can be restored.
Keyword:射电望远镜 超宽带接收机 百万通道频谱仪 仿真设计
Document Type期刊论文
Identifierhttp://ir.ia.ac.cn/handle/173211/12254
Collection国家专用集成电路设计工程技术研究中心
Corresponding Author张夏
Recommended Citation
GB/T 7714
张夏,俞欣颖,段然,等. FAST数字后端及超宽带百万通道频谱仪算法仿真[J]. 天文学进展,2016,34(2):249-257.
APA 张夏,俞欣颖,段然,李菂,蒿杰,&金乘进.(2016).FAST数字后端及超宽带百万通道频谱仪算法仿真.天文学进展,34(2),249-257.
MLA 张夏,et al."FAST数字后端及超宽带百万通道频谱仪算法仿真".天文学进展 34.2(2016):249-257.
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