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脉冲星信号相干消色散与非相干消色散的比较研究
Alternative TitleComparative Study between the Coherent De-dispersion and the Incoherent De-dispersion of Pulsar Signal
黄玉祥1,2; 汪敏1; 郝龙飞1; 李志玄1; 徐永华1
Source Publication天文研究与技术(Astronomical Research & Technology)
2019-01
Volume16Issue:01Pages:16-24
DOI10.14005/j.cnki.issn1672-7673.20180504.001
ClassificationTn911.71
Contribution Rank第1完成单位
Indexed ByCSCD
Keyword脉冲星 相干消色散 非相干消色散
Abstract

脉冲星信号在星际空间传播的过程中,由于星际介质的存在造成观测到的脉冲星信号发生色散,因此需要对接收的脉冲星信号进行消色散,以获得原始的脉冲星信号。目前,消色散方法主要分为两种:相干消色散和非相干消色散。相对来说相干消色散效果彻底,算法较简单,而且能保留原始数据的时间分辨率,不过计算量较大,但是现在快速进步的计算机技术已经使计算量的问题得到很好的解决。为了精确了解两种消色散方法的区别,利用相关系数的方法定量地比较了相干消色散、非相干消色散两种方法的效果:在一定的频率值之下,前者得到消色散效果优于后者。同时确定两种消色散方法在效果相同时的观测频率。

Other Abstract

Spreading through in the interstellar space, pulsar signals, due to the existence of the interstellar medium, would be observed dispersively, therefore we need to remove dispersion of the received pulsar signals for obtaining the original pulsar signals. The current de-dispersion methods are mainly divided into two types, coherent de-dispersion and incoherent de-dispersion. Relatively speaking, the former is able to eliminate dispersion completely, which has simpler algorithm, and preserves the time resolution of the original signal. Although it has a larger amount of calculation, rapid progress of computer technology can solve such problem. In order to accurately understand the difference between the two methods of de-dispersion, this paper, adopting the method of coherence coefficient, quantitatively compares the effects of coherent dedispersion and incoherent de-dispersion: below a certain frequency, the former is better than the latter in obtaining the de-dispersion effects. Meanwhile, the observed frequency of the two de-dispersion methods at the same effect is determined.

Funding Project国家自然科学基金资助项目[U1631237]
Funding Organization国家自然科学基金资助项目[U1631237]
Language中文
Subject Area电子、通信与自动控制技术 ; 信息处理技术
MOST Discipline Catalogue工学 ; 工学::信息与通信工程
ISSN1672-7673
CSCD IDCSCD:6415949
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/12159
Collection射电天文研究组
Corresponding Author黄玉祥
Affiliation1.中国科学院云南天文台,云南,昆明,650011
2.中国科学院大学,北京,100049
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
黄玉祥,汪敏,郝龙飞,等. 脉冲星信号相干消色散与非相干消色散的比较研究[J]. 天文研究与技术(Astronomical Research & Technology),2019,16(01):16-24.
APA 黄玉祥,汪敏,郝龙飞,李志玄,&徐永华.(2019).脉冲星信号相干消色散与非相干消色散的比较研究.天文研究与技术(Astronomical Research & Technology),16(01),16-24.
MLA 黄玉祥,et al."脉冲星信号相干消色散与非相干消色散的比较研究".天文研究与技术(Astronomical Research & Technology) 16.01(2019):16-24.
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