关键词: 信息处理技术 , 时频分析 , Wigner-Hough变换 , 水声 , 信号检测

Abstract: The application of Wigner-Hough transform (WHT) in detection of underwater transient signals was demonstrated. It could be found that the output signal to noise ratio (SNR) was enhanced greatly when the time frequency distribution of undertwater acoustic transient signals contained line components. Simultaneously, WHT could reduce the cross terms of multi- component signals. Simula?tion results show that WHT can detect and identify the signals better even if the SNR is — 5 dB for multi- component signals and 一 7 dB for mono- component signals. When this method is used to analyze real lake test data in which some transient components are included, the analysis results show that WHT detection is superior to matched filter, Wigner-Ville distribution (WVD) and cross Wigner-Ville distribution (XWVD).

Key words: information processing technique , time frequency analysis , Wigner-Hough transform , un?derwater acoustics , signal detection