UUV声纳浅海声信道频率特性分析  

Frequency Characteristics Analysis of Shallow Water Acoustic Channel for UUV Sonar

作　　者：邓新文[1] 叶浩亮[1] 

机构地区：[1]中国人民解放军91388部队

出　　处：《鱼雷技术》2013年第3期184-188,共5页Torpedo Technology

摘　　要：多途效应和混响是浅海声信道最为突出的2个特点,它们会造成水下声信号传播畸变,严重影响信号分析和检测。基于此,利用非消声水池试验展现了水下信道多途效应会造成信号频谱展宽,引起水下声纳信号检测性能下降的特点,通过理论分析并依据湖海试数据表明,运动声纳的近场混响具有强非平稳性,点谱展宽会更加明显,但随着时间推移,混响的多普勒展宽将会变小,所以不能利用基于平稳性假设的混响模型算法来抑制混响。本文的研究可为声纳抗多途、抗混响以及声纳在水下航行器上的应用提供参考。To improve the detection performance of underwater unmanned vehicle （UUV） sonar, the frequency charac- teristics of shallow water acoustic channel is analyzed. Shallow water acoustic channel is more complex than blue water acoustic channel. Due to multipath effect and reverberation, the propagation of acoustic wave is often deformed, result- ing in degradation in signal detection performance of sonar. The frequency characteristics of underwater acoustic chan- nel are analyzed with the data from tank experiment, lake and sea trials. Tank experiment shows the spread of signal frequency spectrum due to multipath effect. The data from lake and sea trials show that for the high-speed active sonar, the short-rapge reverberation is highly non-stationary, and the spread of point spectrum becomes more obvious. But the Doppler spread decreases with time. Therefore, the reverberation model algorithm based on stationarity assumption cannot be used to suppress the underwater vehicle sonar reverberation.

关 键 词：水下航行器 水声信道 多途 混响 多普勒展宽 

分 类 号：TJ630.34[兵器科学与技术—武器系统与运用工程] TN911.7[电子电信—通信与信息系统]