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

Xie Zhen-Hua Xu Lu-Ping Ni Guang-Ren

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

Xie Zhen-Hua, Xu Lu-Ping, Ni Guang-Ren
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  • Abstract views:  3313
  • PDF Downloads:  1473
  • Cited By: 0
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  • Received Date:  05 December 2007
  • Accepted Date:  28 February 2008
  • Published Online:  20 October 2008

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

  • 1. (1)西安电子科技大学电子工程学院,西安 710071; (2)中国科学院国家授时中心,西安 710600

Abstract: 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.

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