摘要
通过对动物声呐信号的信息特征分析，指出它是一种特殊包络的双曲调频信号，这种信号不但具有宽带多普勒不变性，而且具有距离延伸不变性，对于亮点检测和识别，还具有最小的时频耦合和模糊。结合近代鱼雷对高速目标的搜索、识别和制导等具体要求，选择适当的波形参数，仿真设计了相应的动物声呐信号，并用自行设计的软件分析和图示其波形的窄带和宽带模糊度、时频分布等特性．
By analyzing the characteristics of animal sonar signals, it's pointed out that they are a kind of hyperbolic frequency-modulated (HFM) signal. HFM signals provide the spread-unvariation in both Doppler and delay, and minimum time-frequency coupling and smearing in detection or classification of the object echoes. To meet the requirements of modern torpedo, the animal sonar signals with different parameters are simulated and the narrow-and wide-band ambiguity and the Wigner-Ville distributions are shown graphically.
出处
《声学学报》
EI
CSCD
北大核心
1999年第1期29-44,共16页
Acta Acustica
基金
中船总七院国防预研基金
