Author Affiliations
1School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China2Key Laboratory of Ocean Acoustics and Sensing Ministry of Industry and Information Technology, Xi’an 710072, China3State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, Chinashow less
Fig. 1. The output SNR of EVD varying with various snapshot number and spatial dimension,
: (a) spatial dimension
; (b) snapshot number
.
EVD的输出信噪比随接收数据快拍数和空间维度的变化曲线,
(a) 固定空间维度
; (b) 固定快拍数
Fig. 2. The flow diagrams of the DR-GLR detectors when using a VLA使用VLA时DR-GLR检测器的算法流程图
Fig. 3. The arrival angle of acoustic signal on the HLA.水平阵声源信号入射方位
Fig. 4. The flow diagrams of the DR-GLR detectors when using a HLA.使用HLA时DR-GLR检测器的算法流程图
Fig. 5. Deep-sea waveguide and environmental parameters深海波导及相关环境参数
Fig. 6. Deep-sea sound speed profile.深海声速剖面
Fig. 7. Probability of detection curves with various SNRs,
= 0.01: (a)
; (b)
.
不同信噪比下检测概率曲线比较,
= 0.01 (a)
; (b)
Fig. 8. Probability of detection curves with various SNRs when noise power is uncertain: (a)
; (b)
.
噪声功率不确定, 不同信噪比下检测概率曲线比较 (a)
; (b)
Fig. 9. Probability of detection curves with various spatial dimension: (a) EVD; (b) CEVD.不同数据维度下的检测概率曲线对比, 快拍数
(a) EVD; (b) CEVD
Fig. 10. Modal information sampled on the array and singular values of corresponding mode matrices: (a) Various modes sampled on the VLA; (b) normalized singular values associated with the VLA; (c) various modes sampled on the HLA; (d) normalized singular values associated with the HLA.阵列采样模态信息及相应模态矩阵的奇异值 (a) VLA采样的各阶模态; (b) VLA; 归一化的各阶奇异值分布; (c) HLA采样的各阶模态; (d) HLA, 归一化的各阶奇异值分布
Fig. 11. Probability of detection curves of different detectors, snapshot number
: (a) VLA; (b) HLA.
不同信噪比下的检测概率曲线对比, 快拍数
(a) VLA; (b) HLA
Fig. 12. Probability of detection curves of different detectors when noise power is uncertain, snapshot number
: (a) VLA; (b) HLA.
噪声功率不确定, 不同信噪比下检测概率曲线对比, 快拍数
(a) VLA; (b) HLA
Fig. 13. Modal functions and horizontal wavenumber of various normal modes excited by the acoustic source: (a) Modal functions along with various depths; (b) distribution of various horizontal wavenumbers.声源激发的各阶简正波模态函数和水平波数 (a)各阶模态函数幅值随波导深度的变化; (b)各阶水平波数分布
Fig. 14. The influence of array configuration on the degree of dimension reduction,
: (a) Array depth of 100 m; (b) hydrophone spacing of 4 m.
阵列配置对降维程度的影响,
(a) 阵列深度100 m; (b) 阵元间距4 m
Fig. 15. The dimension reduction coefficient varying with increasing frequency.降维系数随声源频率的变化曲线