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In order to increase the detection speed and to improve the detection rate in low signal-to-noise ratio, a novel detection algorithm for pulsar integrated pulse profile is proposed based on S-transform. We prove that the local S-transform spectrum of Gaussian white noise follows chi-square distribution with two degrees of freedom in this paper, and based on this, threshold processing is operated on the S-transform power spectra of cumulative signal; then, the total energy of the time-frequency power spectral after threshold processing is accumulated to construct the detecting statistics to obtain the statistic decision. Moreover, the time-frequency power spectra after threshold processing can also be used to measure the time delay of pulsar signal. The simulation result verifies the effectiveness of the proposed method which is superior to a similar method based on the Gaussian distribution; in addition, it can give the time delay with a certain accuracy.
[1] Zhang L, Bian X, Mei D C 2001 Chin. Phys. 10 662
[2] Sheikh S I 2005 Ph. D. Dissertation (Maryland: University of Maryland)
[3] Zhong C X, Yang T G 2007 Acta Phys. Sin. 56 6157 (in Chinese) [仲崇霞, 杨廷高 2007 物理学报 56 6157]
[4] Hu H J, Zhao B S, Sheng L Z, Yan Q R 2011 Acta Phys. Sin. 60 029701 (in Chinese) [胡慧君, 赵宝升, 盛立志, 鄢秋荣 2011 物理学报 60 029701]
[5] Shrauner J A 1997 Ph. D. Dissertation (New Jersey: Princeton University)
[6] Xie Z H 2008 Ph. D. Dissertation (Xi'an: Xidian University) (in Chinese) [谢振华 2008 博士学位论文 (西安: 西安电子科技大学)]
[7] Gregory P C 1996 Astrophys. J. 10 1
[8] Zhang H, Xu L P, Xie Q, Luo N 2011 Acta Phys. Sin. 60 049701 (in Chinese) [张华, 许录平, 谢强, 罗楠 2011 物理学报 60 049701]
[9] Stockwell R G, Mansinha L, Lowe R P 1996 IEEE. Trans. Sig. Proc. 44 998
[10] Jin H M 2010 Ph. D. Dissertation (Changsha: Hunan University) (in Chinese) [金慧敏 2010 博士学位论文 (长沙: 湖南大学)]
[11] Mallat S 1999 A Wavelet Tour of Signal Processing (2nd Ed.) (New York: Academic Press) p194
[12] Gao J H, Man W S, Chen S M 2004 Chinese J. Geophys. 47 869 (in Chinese) [高静怀, 满蔚仕, 陈树民 2004 地球物理学报 47 869]
[13] Jenkins G M, Watts D G 1968 Spectral Analysis and Its Applications (1st Ed.) (San Francisco: Holden Day) p525
[14] Gilman D L, Fuglister F J 1963 J. Atmos. Sci. 20 182
[15] Torrence C, Compo G P 1998 BAMS 79 61
[16] Wang L, Xu L P, Zhang H, Luo N 2012 J. Astronautics 33 1460 (in Chinese) [王璐, 许录平, 张华, 罗楠 2012 宇航学报 33 1460]
[17] Taylor J H 1992 Phil. Trans. R. Soc. Lond. A 341 117
[18] Xie Z H, Xu L P, Ni G R 2008 Acta Phys. Sin. 57 6683 (in Chinese) [谢振华, 许录平, 倪广仁 2008 物理学报 57 6683]
[19] Shang H Y, Shui P L, Zhang S H, Zhang Y B, Zhu T Q 2007 J. Electron. Inf. Technol. 29 1416 (in Chinese) [尚海燕, 水鹏朗, 张守宏, 张雅斌, 朱天桥 2007 电子与信息学报 29 1416]
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[1] Zhang L, Bian X, Mei D C 2001 Chin. Phys. 10 662
[2] Sheikh S I 2005 Ph. D. Dissertation (Maryland: University of Maryland)
[3] Zhong C X, Yang T G 2007 Acta Phys. Sin. 56 6157 (in Chinese) [仲崇霞, 杨廷高 2007 物理学报 56 6157]
[4] Hu H J, Zhao B S, Sheng L Z, Yan Q R 2011 Acta Phys. Sin. 60 029701 (in Chinese) [胡慧君, 赵宝升, 盛立志, 鄢秋荣 2011 物理学报 60 029701]
[5] Shrauner J A 1997 Ph. D. Dissertation (New Jersey: Princeton University)
[6] Xie Z H 2008 Ph. D. Dissertation (Xi'an: Xidian University) (in Chinese) [谢振华 2008 博士学位论文 (西安: 西安电子科技大学)]
[7] Gregory P C 1996 Astrophys. J. 10 1
[8] Zhang H, Xu L P, Xie Q, Luo N 2011 Acta Phys. Sin. 60 049701 (in Chinese) [张华, 许录平, 谢强, 罗楠 2011 物理学报 60 049701]
[9] Stockwell R G, Mansinha L, Lowe R P 1996 IEEE. Trans. Sig. Proc. 44 998
[10] Jin H M 2010 Ph. D. Dissertation (Changsha: Hunan University) (in Chinese) [金慧敏 2010 博士学位论文 (长沙: 湖南大学)]
[11] Mallat S 1999 A Wavelet Tour of Signal Processing (2nd Ed.) (New York: Academic Press) p194
[12] Gao J H, Man W S, Chen S M 2004 Chinese J. Geophys. 47 869 (in Chinese) [高静怀, 满蔚仕, 陈树民 2004 地球物理学报 47 869]
[13] Jenkins G M, Watts D G 1968 Spectral Analysis and Its Applications (1st Ed.) (San Francisco: Holden Day) p525
[14] Gilman D L, Fuglister F J 1963 J. Atmos. Sci. 20 182
[15] Torrence C, Compo G P 1998 BAMS 79 61
[16] Wang L, Xu L P, Zhang H, Luo N 2012 J. Astronautics 33 1460 (in Chinese) [王璐, 许录平, 张华, 罗楠 2012 宇航学报 33 1460]
[17] Taylor J H 1992 Phil. Trans. R. Soc. Lond. A 341 117
[18] Xie Z H, Xu L P, Ni G R 2008 Acta Phys. Sin. 57 6683 (in Chinese) [谢振华, 许录平, 倪广仁 2008 物理学报 57 6683]
[19] Shang H Y, Shui P L, Zhang S H, Zhang Y B, Zhu T Q 2007 J. Electron. Inf. Technol. 29 1416 (in Chinese) [尚海燕, 水鹏朗, 张守宏, 张雅斌, 朱天桥 2007 电子与信息学报 29 1416]
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