Title :
Time domain characteristic study of ship radiated noise based on the similar sequence repeatability
Author :
Xiangdong, CHEN ; Zheng, Wang
Author_Institution :
Nanjing Inst. of Commun. Eng., China
Abstract :
In this paper, the local similarity of ship radiated noise data is studied based on the temporal characteristics of the time series itself. First, the phase space is constructed using the time delay approach (the dimension is 5, 10, 20, 30, 50 respectively). Then, in the phase space, the similar sequence repeatability is calculated by comparing the reference sequence with the phase space point vector. The repeatability (RPT) curves of the ship-radiated noise are drawn and their features are analyzed. Finally the entropy of the RPT parameter of the ship-radiated noise is extracted. The experimental results show that the RPT curves and entropy can better reflect the time domain characteristics of the ship-radiated noise and can be applied as new evidence in underwater acoustic target recognition
Keywords :
acoustic noise; acoustic signal processing; entropy; feature extraction; fractals; sequences; ships; signal reconstruction; time series; time-domain analysis; underwater sound; RPT parameter; acoustic signal self similarity; entropy; local similarity; phase space; phase space point vector; reference sequence; repeatability curves; ship radiated noise; similar sequence repeatability; time delay approach; time domain characteristic; time domain characteristics; time series; underwater acoustic target recognition; Acoustic noise; Delay effects; Entropy; Feature extraction; Fourier transforms; Marine vehicles; Signal analysis; Target recognition; Underwater acoustics; Wideband;
Conference_Titel :
Signal Processing Proceedings, 1998. ICSP '98. 1998 Fourth International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-4325-5
DOI :
10.1109/ICOSP.1998.770893
