Time offset measurement algorithm based on bispectrum for pulsar integrated pulse profiles

被引：27

作者：

Xie Zhen-Hua ^{[1
]}

Xu Lu-Ping ^{[1
]}

Ni Guang-Ren ^{[2
]}

机构：

[1] Xidian Univ, Sch Elect Engn, Xian 710071, Peoples R China

[2] Chinese Acad Sci, Nat Time Serv Ctr, Xian 710600, Peoples R China

来源：

ACTA PHYSICA SINICA | 2008年 / 57卷 / 10期

基金：

国家高技术研究发展计划(863计划); 中国国家自然科学基金;

关键词：

pulsars; time of pulse arrival; time offset of integrated pulse profile; bispectrum;

D O I：

10.7498/aps.57.6683

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In order to improve time offset measurement precision of pulsar integrated pulse profile and enhance the capability of noise suppression, a time offset measurement algorithm based on bispectrum for pulsar integrated pulse profile was proposed. Theoretically, bispectrum can completely suppress the additive Gaussian white noise, and the time offset in the third-order cumulants will result in phase rotation in the bispectrum. Time offset measurement algorithm based on bispectrum can be deduced by contrasting self-bispectrum and cross-bispectrum and solving the extremum formula. The results of experiments show that time offset measurement algorithm based on bispectrum can suppress the additive Gaussian white noise, and its precision is higher than that based on power spectrum proposed by Taylor.

引用

页码：6683 / 6688

页数：6

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