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The digital back-end for new russian VLBI-network

Transactions of IAA RAS, issue 24, 206–211 (2012)

Keywords: antenna, digital back-end, intermediate frequency (IF) range signals

Abstract

The main functions of the digital back-end (DBE) are digitizing of input signals and translation it from intermediate frequency (IF) range to baseband, 2-bits quantizing, formatting the data into VDIF-frames and transmitting VDIF-frames to storage system by 10 G Ethernet link. The DBE has four channels. The bandwidth of the channels could be 512 MHz or 1024 MHz depending on the required mode. Input signals occupies the IF range of 1-1.5 GHz or 1-2 GHz. Digitized data are captured by FPGA and processed by it. The DBE unit is able to process four 512 MHz bandwidth channels or two 1024 MHz bandwidth channels. The 2-bits output data streams are transmitted to storage system as VDIF frames by fiber-optic links. The DBE output data rate is 8 or 16 Gbit/s. The DBE has small size and weight and could be mounted on the antenna near to outputs of microwave frequency convertors.

Citation

Text

BibTeX

RIS

E. Nosov, S. Grenkov,  L. Fedotov . The digital back-end for new russian VLBI-network // Transactions of IAA RAS. — 2012. — Issue 24. — P. 206–211.

@article{nosov2012,
  abstract = {The main functions of the digital back-end (DBE) are digitizing of input signals and translation it from intermediate frequency (IF) range to baseband, 2-bits quantizing, formatting the data into VDIF-frames and transmitting VDIF-frames to storage system by 10 G Ethernet link.
The DBE has four channels. The bandwidth of the channels could be 512 MHz or 1024 MHz depending on the required mode. Input signals occupies the IF range of 1-1.5 GHz or 1-2 GHz. Digitized data are captured by FPGA and processed by it. The DBE unit is able to process four 512 MHz bandwidth channels or two 1024 MHz bandwidth channels. The 2-bits output data streams are transmitted to storage system as VDIF frames by fiber-optic links. The DBE output data rate is 8 or 16 Gbit/s. The DBE has small size and weight and could be mounted on the antenna near to outputs of microwave frequency convertors.},
  author = {E. Nosov and S. Grenkov and L. Fedotov},
  issue = {24},
  journal = {Transactions of IAA RAS},
  keyword = {antenna, digital back-end, intermediate frequency (IF) range signals},
  pages = {206--211},
  title = {The digital back-end for new russian VLBI-network},
  url = {http://iaaras.ru/en/library/paper/851/},
  year = {2012}
}

TY  - JOUR
TI  - The digital back-end for new russian VLBI-network
AU  - Nosov, E.
AU  - Grenkov, S.
AU  - Fedotov, L.
PY  - 2012
T2  - Transactions of IAA RAS
IS  - 24
SP  - 206
AB  - The main functions of the digital back-end (DBE) are digitizing of
input signals and translation it from intermediate frequency (IF)
range to baseband, 2-bits quantizing, formatting the data into VDIF-
frames and transmitting VDIF-frames to storage system by 10 G
Ethernet link.  The DBE has four channels. The bandwidth of the
channels could be 512 MHz or 1024 MHz depending on the required mode.
Input signals occupies the IF range of 1-1.5 GHz or 1-2 GHz.
Digitized data are captured by FPGA and processed by it. The DBE unit
is able to process four 512 MHz bandwidth channels or two 1024 MHz
bandwidth channels. The 2-bits output data streams are transmitted to
storage system as VDIF frames by fiber-optic links. The DBE output
data rate is 8 or 16 Gbit/s. The DBE has small size and weight and
could be mounted on the antenna near to outputs of microwave
frequency convertors.
UR  - http://iaaras.ru/en/library/paper/851/
ER  -