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Higher-Order Sampling, Over Sampling and Digital Filtering Techniques for Radio Interferometry

Satoru IGUCHI, Noriyuki KAWAGUCHI

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Summary :

The purpose of this paper is to improve the detection sensitivity of radio interferometry. The development of wideband signal processing techniques is necessary for high-sensitivity radio interferometry. The higher-order sampling technique can achieve wider bandwidth than expensive wide-baseband conversion system. The over sampling technique can improve the quantization loss from 11.89% to 3.99% at the 4-level quantized sampling. Moreover, the digital filter can reduce the folding noise incurred by the non-rectangular frequency response at a sampling process. It is confirmed that the wideband and low-loss A/D conversion system may be realized by implementing the higher-order sampling, over sampling and digital filtering techniques. In this paper, the key features focusing on these advanced techniques for radio astronomy are presented in detail.

Publication
IEICE TRANSACTIONS on Communications Vol.E85-B No.9 pp.1806-1816
Publication Date
2002/09/01
Publicized
Online ISSN
DOI
Type of Manuscript
PAPER
Category
Sensing

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