Shallow Water Coherence-time of Matched-field Processing in the Presence of Linear Internal Waves

摘要：

The signal coherence-time is a useful parameter in sonar applications. It determines the integral time and the maximal temporal processing gain for detection and localization. The temporal coherence of acoustic signals propagating through fluctuated ocean with the presence of internal waves will lose its stability and become uncorrelated in a short time. The relationship between the signal coherence-time of matched-field processing (MFP) and the acoustic frequency, the source-receiver range, and the sound speed standard deviation caused by linear internal waves in shallow water is numerically examined based on oceanographic data from two shallow water experiments conducted in the Yellow Sea and South China Sea respectively. Empirical formulas of the coherence-time as a function of range, frequency and sound speed standard deviation are derived.

作者: Guihua Ji Zhenglin Li

作者单位: Haikou laboratory,Institute of Acoustics,Chinese Academy of Sciences,Haikou,570105,P.R.China National Laboratory of Acoustics,Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190,P.R.China

会议类型: 国际会议

会议名称: The 10th Western Pacific Acoustics Conference(第十届西太平洋声学会议WESPAC X)

会议地点: 北京

会议语种:英文

页码: 1-7

在线出版日期: 2009-09-21（万方平台首次上网日期，不代表论文的发表时间）