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http://dx.doi.org/10.5303/PKAS.2004.19.1.101

DIGITAL PROCESSING SYSTEM FOR KVN DATA AQUISITION  

OH SE-JIN (Korea Astronomy Observatory)
ROH DUK-GYOO (Korea Astronomy Observatory)
CHUNG HYUN-SOO (Korea Astronomy Observatory)
HAN SEOG-TAE (Korea Astronomy Observatory)
Wajima Kiyoaki (Korea Astronomy Observatory)
Saso Tetsuo (korea Astronomy Observatory, Ajou University)
Kawaguchi Noriyuki (National Astronomical Observatory of Japan)
Ozeki Kensuke (Elecs Industry Co., LTD.,)
CHOI HAN-GYU (Cubex Co., LTD.,)
Publication Information
Publications of The Korean Astronomical Society / v.19, no.1, 2004 , pp. 101-107 More about this Journal
Abstract
This paper describes the digital back-end system for getting the data to analyze the user observation mode by digitalize the analog data after receiving the space radio using the radio telescope, The received analog data will be digitalized by high-speed sampler with 1 Gsps for 4 channel frequency band of millimeter wave, and the digital data will be transported through the fiber-optic digital transmission system and WDM(wavelength division multiplex) to observation building, The wideband digital FIR(Finite Impulse Response) filters analyze the data for user observation mode to record the data in high-speed recorder with 1 Gbps. In this paper, we introduce the overall system configuration and features combined by various information and communication technology in radio astronomy briefly, which will be adopted by KVN(Korean VLBI Network).
Keywords
VLBI; Sampler; Fiber-optic Transmission System; Digital Filter; Symmetric FIR Filter Unit(SFFU); Digital Spectrometer;
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