Coherence-Time of Matched-Field Processing in Shallow Water in the Presence of Linear Internal Waves
JI Gui-Hua1,2,3, LI Zheng-Lin1,2, DAI Qiong-Xing2
1National Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 1001902Haikou Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Haikou 5701053Graduate University of Chinese Academy of Sciences, Beijing 100190
Coherence-Time of Matched-Field Processing in Shallow Water in the Presence of Linear Internal Waves
JI Gui-Hua1,2,3, LI Zheng-Lin1,2, DAI Qiong-Xing2
1National Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 1001902Haikou Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Haikou 5701053Graduate University of Chinese Academy of Sciences, Beijing 100190
摘要Relationships among the signal coherence-time of matched-field processing (MFP), the acoustic frequency, the source-receiver range, and the sound speed standard deviation (STD) caused by internal waves in shallow water, are numerically investigated based on oceanographic data from two shallow water experiments. It is found that the coherence-time can be fitted with an inverse square-root power of range, a near inverse 1 power of frequency, and inverse 1.3 power of sound speed STD.
Abstract：Relationships among the signal coherence-time of matched-field processing (MFP), the acoustic frequency, the source-receiver range, and the sound speed standard deviation (STD) caused by internal waves in shallow water, are numerically investigated based on oceanographic data from two shallow water experiments. It is found that the coherence-time can be fitted with an inverse square-root power of range, a near inverse 1 power of frequency, and inverse 1.3 power of sound speed STD.
(Passive sonar systems and algorithms, matched field processing in underwater acoustics)
引用本文:
JI Gui-Hua;;LI Zheng-Lin;DAI Qiong-Xing. Coherence-Time of Matched-Field Processing in Shallow Water in the Presence of Linear Internal Waves[J]. 中国物理快报, 2009, 26(9): 94301-094301.
JI Gui-Hua, , LI Zheng-Lin, DAI Qiong-Xing. Coherence-Time of Matched-Field Processing in Shallow Water in the Presence of Linear Internal Waves. Chin. Phys. Lett., 2009, 26(9): 94301-094301.
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2009, Vol. 26 
