Research on a port and starboard ambiguity conjugate cancelling method for twin-line array  

作　　者：WANG Fupo LI Shuqiu LI Yu HUANG Haining 

机构地区：[1]Institute of Acoustics,Chinese Academy of Sciences Beijing 100190

出　　处：《Chinese Journal of Acoustics》2010年第3期277-284,共8页声学学报（英文版）

基　　金：supported by the Knowledge Innovation Program of the Chinese Academy of Sciences and National Defense Research Projects(A1320070051)

摘　　要：It is always an important problem in sonar signal processing for towed array to distinguish the target between port and starboard.It is studied in this paper the normalized beam output function for the parallel twin-line array and found a method that can enhance its port and starboard ambiguity suppression by equalizing the amplitude and phase of the beam output from the conventional beam forming.This method gets the weight value by analyzing the normalized beam output function,and then uses the amplitude weight and phase compensation for beam outputs of the twin arrays to cancel the conjugate（mirror） output. Therefore,the port and starboard restrain ratio is maximized.Both the computer simulation and sea trial data showed that this is a simple and practical method,can better enhance the port and starboard restrain ratio,especially when the band is wide.It is always an important problem in sonar signal processing for towed array to distinguish the target between port and starboard.It is studied in this paper the normalized beam output function for the parallel twin-line array and found a method that can enhance its port and starboard ambiguity suppression by equalizing the amplitude and phase of the beam output from the conventional beam forming.This method gets the weight value by analyzing the normalized beam output function,and then uses the amplitude weight and phase compensation for beam outputs of the twin arrays to cancel the conjugate（mirror） output. Therefore,the port and starboard restrain ratio is maximized.Both the computer simulation and sea trial data showed that this is a simple and practical method,can better enhance the port and starboard restrain ratio,especially when the band is wide.

分 类 号：TN912.1[电子电信—通信与信息系统] U691.1[电子电信—信息与通信工程]