Improved space time prewhitener for linear frequency modulation reverberation using fractional Fourier transform

被引：5
|
作者：
Wang, Ruhang [1 ]
Huang, Jianguo [1 ]
Ma, Tian [1 ]
Zhang, Qunfei [1 ]
机构：
[1] Northwestern Polytech Univ, Coll Marine Engn, Xian 710072, Peoples R China
来源：
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA | 2010年 / 128卷 / 06期
关键词：
Fourier transforms - Sonar - Chirp modulation - Frequency modulation;
D O I：
10.1121/1.3509145
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
This letter presents an improved space time prewhitening method for linear frequency modulation (LFM) reverberation. The proposed method transforms the reverberation to fractional Fourier domain to whiten using fractional Fourier transform. The linear varying frequency in LFM reverberation is focused on a stationary frequency, and the adjacent block signal is used as the reference signal of prewhitening. Finally, experiment results with real reverberation data verify that the proposed method improves the detection performance of active sonar in shallow sea significantly. (c) 2010 Acoustical Society of America
引用
收藏
页码：EL361 / EL365
页数：5
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