Pick-up of Echo Starting Location in Reverberation
ZHANG Zongtang
YANG Xiqian
DAI Weiguo
Abstract：To extract the starting location of underwater target echo is the key of target detection and identification .In practice ,the signal received by active sonar consist of not only echo but also noise and reverberation .The echo is always sub‐merged in background noise ,so it is hard to extract the starting location .This paper introduces Fractional Fourier Transform which is short for FRFT into echo detection and uses sliding window to intercept echo .When the peak value location of the intercepted signal and the transmitted signal match in FRFT base ,we can then extract the starting location .The result of simulation shows the proposed method has great effect .
Keywords：echo starting locationreverberationFRFTactive sonarLFM
Publication Date：2014-11-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 73-75,79 )