LI Yu  ZHANG Yangfan  HUANG Haining  LI Shuqiu  LI Qihu  ZHANG Chunhua 

(Institute of Acoustics, The Chinese Academy of Sciences Beijing 100080) 

Received Nov.24, 2006 

Revised Jan.16, 2007

Abstract  A passive synthetic aperture based on phase correction algorithm for solving the port-starboard discrimination problem in the non-aligned towed twin-line array sonar, is described. This method creates a virtual array through applying the estimated phase correction into one array of twin-line arrays. Because the synthetic virtual array is aligned with the other array in twin-line arrays, the right port-starboard discriminated results can be obtained by array processing based on the new synthetic twin-line array. The effect of proposed method has been shown by simulated and sea-trials results in towed twin-line array sonar. With low extra computational loads, the proposed method is easy to apply to the practice.

PACS number: 43.30, 43.60