J4 ›› 2012, Vol. 39 ›› Issue (2): 127-132+191.doi: 10.3969/j.issn.1001-2400.2012.02.021

• Original Articles • Previous Articles     Next Articles

Research on recognizing the radar signal using  the bispectrum cascade feature

WANG Shiqiang1;ZHANG Dengfu1;BI Duyan1;XUE Deyou2;YONG Xiaoju1
  

  1. (1. Institute of Engineering, AFEU, Xi'an  710038, China;
    2. Dept. of C4ISR and Satellite Commun., Communication NCO Academy, Dalian  116600, China)
  • Received:2011-03-22 Online:2012-04-20 Published:2012-05-21
  • Contact: WANG Shiqiang E-mail:wunsicon@163.com

Abstract:

To deal with the problem of emitter identification caused by parameter complexity and agility of multi-function radars, a new identification method based on the bispectrum feature is proposed. This method takes the bispectrum of emitters as the specific emitter feature and the Bhattacharyya distance measurement as the cascade feature extraction algorithm. Bispectrum analysis can restrain the effect of Gauss White Noise on radar signal, and retain the amplitude and phase information. So this paper utilizes this characteristic to enhance the validity of the radar emitter signal feature. Aimed at the problem that the signal bispectrum contains many redundancy bispectrums, the Bhattacharyya distance is introduced to extract the bispectrum cascade feature with best separation as the radar signal feature. Experimental results show that the proposed method is suitable for extracting radar signal characteristics and has a good recognition performance. The average accuracy is not less than 95% at the signal to noise ratio of a wide range.

Key words: bispectrum analysis, feature extraction, separation, Bhattacharyya distance, support vector machine

CLC Number: 

  • TN 974