HUANG Yong LI Yu ZHU Peisheng LI Zheng HUANG Hainig

(Institute of Acoustics, Chinese Academy of Sciences Beijing 100190)

Received Dec. 30, 2008

Revised Aug. 18, 2009

Abstract A moving synthetic aperture processing with high resolution spectral analysis method was provided to estimate the mode wave-number of acoustics in shallow water waveguide, and to overcome the problem of short aperture. First, large aperture synthetic array is created by a moving of short horizontal array, then a MUSIC processing is applied to the estimation of normal mode wave-number. The simulated and sea trial results indicate that the problem of short aperture can be resolved by using of synthetic aperture processing, and the accuracy of estimation in normal mode wave-number could be improved by varying the array depth when it is being towed away from the source.　　　　

PACS numbers: 43.30, 43.60