Journal of Northeastern University(Natural Science)

Journal of Northeastern University ›› 2003, Vol. 24 ›› Issue (8): 743-746.DOI: -

• OriginalPaper • Previous Articles     Next Articles

Optimizing algorithm in determining the number of signals using wavelet packet decomposition

Wang, Jin-Kuan (1); Xue, Yan-Bo (1); Liu, Zhi-Gang (1); Liu, Fu-Lai (1)   

  1. (1) Sch. of Info. Sci. and Eng., Northeastern Univ., Shenyang 110004, China
  • Received:2013-06-24 Revised:2013-06-24 Published:2013-06-24
  • Contact: Xue, Y.-B.
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Abstract: Detection of number of signals by information theoretic criteria is given. In the occasions of low signal-to-noise ratio (SNR) and large snapshots, incorrect estimation of signal number is often yielded with both Akaike Information Criteria (AIC) and Minimum Description Length (MDL). A wavelet packet decomposition (WPD) based algorithm is proposed to optimize MDL, which is addressed wpMDL. With the features of minimum prediction error and mode isolation, pseudo 2-D subband decomposition algorithm based on one-dimension (1-D) wavelet packet decomposition is introduced to not only improve the estimate performance but also save the computation by O(N4) compared with 2-D WPD.

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