jianjie

中国天文学会学术期刊

天文学进展

PROGRESS IN ASTRONOMY

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数字滤波技术在射电天文测量中的应用

项英，张秀忠
(中国科学院上海天文台，上海 200030)

摘要

随着数字技术的发展，数字信号处理芯片的速度越来越快，这为高速数字滤波的实时实现提供了可能。简要阐述了数字滤波的原理，并对两种数字滤波的实现方法进行了分析；给出了数字滤波较模拟滤波的优势；介绍了数字滤波在射电天文测量中的各种应用。

Application of Digital Filtering in Radio Astronomy

XIANG Ying, ZHANG Xiu-zhong
(Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China)

Abstract

With the rapid technological advances in digital devices, circuits and systems, it is available for real-time processing to use high speed digital filtering with FPGAs (Field Programmable Gate Array Circuits). In this paper, we briefly review the theory of digital filtering and analyse the two kinds of implementation in designing of digital filters. Compared with analog filters, digital filters offer outstanding advantages which are described in the paper. The applications in radio astronomy are introduced as well.