混响背景下主动声纳接收信号的可分离性探讨

混响背景下主动声纳的接收信号是否具有可分离性是盲分离在主动声纳抗混响中获得应用的前提条件。在建立混响背景下的接收信号模型的基础上,通过模型中源信号间相关性的分析,提出了一种接收信号是否具有可分离性的判断准则：在绝大多数时延条件下相关系数很小的发射信号,其混响背景下的接收信号具有可分离性。通过主动声纳的两种发射信号（CW和LFM）的仿真和海试实验研究对这一准则的可行性进行了检验。对于符合可分离性判断准则LFM信号,实验结果验证了其混响背景下接收信号的可分离性。

The separability of active sonar signals in the presence of reverberation

The separability of active sonar signals is the important factor for the application of blind source separation（BSS） to the signal detection in the presence of reverberation.Based on the sonar data model and the analysis of the source correlation function,a rule has been presented for judging the separability of the sonar data.It has been described that the reverberation data is separable when the sources have small correlation coefficient in most of time delays.The simulation data and trial data with two classical transmitting signals（CW and LFM） are used to verify the rule,and the result says that the separation of the reverberation data is possible when the LFM is the transmitting signal.