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http://dx.doi.org/10.6109/jkiice.2013.17.3.546

Enhancement of Frequency Lines of Acoustic Signature in Vernier Analysis Using the Autocorrelation-based Postprocessing  

Lee, Jungho ((주)LIG넥스원)
Bae, Keunsung (경북대학교)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.17, no.3, 2013 , pp. 546-555 More about this Journal
Abstract
In this paper, we propose a novel method to enhance the harmonic components from the frequency lines of the passive sonar signals. For this, we first separate the stable frequency lines from unstable ones using mean and difference of spectral bins in the vernier analysis. Then we emphasize the harmonic components using autocorrelation-based postprocessing, and enhance them by reducing the background noise with the split-window two pass mean algorithm. Experimental results for real underwater acoustic data are presented with our discussions.
Keywords
Underwater acoustics; Passive sonar; Frequency lines; Vernier analysis; Split-window two pass mean;
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