DOA estimation based on fourth order cumulant beamforming for nonuniform linear array of DIFAR sonobuoys

被引:11
|
作者
Massoud, Ali [1 ]
Osman, Abdallah [2 ]
Noureldin, Aboelmagd [3 ]
机构
[1] Queens Univ, Kingston, ON, Canada
[2] Univ Calgary, Calgary, AB, Canada
[3] Royal Mil Coll Canada, Kingston, ON, Canada
关键词
D O I
10.1016/j.compeleceng.2012.03.004
中图分类号
TP3 [计算技术、计算机技术];
学科分类号
0812 ;
摘要
The Directional Frequency Analysis and Recording (DIFAR) sonobuoy has been widely used in underwater target localization because it can capture more information than the Low Frequency Analysis and Recording (LOFAR) omnidirectional sonobuoy. Recently, array processing for fields of DIFAR sonobuoys has attracted considerable attention in order to enhance the direction of arrival (DOA) estimation performance and accuracy. DIFAR sonobuoys may become irregularly spaced due to the deployment method and the drift experienced once deployed, resulting in a nonuniform array. In this paper, we demonstrate the fourth-order cumulant beamforming (FOC-BF) technique to estimate the DOA for a nonuniform linear array of DIFAR sonobuoys. FOC-BF was compared with the conventional beamforming (CBF) through simulation works. The results show that FOC-BF provides better spatial spectrum with lower sidelobes than CBF. Furthermore, FOC-BF provides superior DOA estimation accuracy over CBF at very low signal to noise ratios (SNR). (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:986 / 993
页数:8
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