TENG Pengxiao  MA Chizhou  YANG Yichun  LI Xiaodong 

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

Received Aug. 25, 2006 

Revised Nov. 15, 2006 

Abstract  A robust algorithm of direction of arrival (DOA) estimation for coherent wideband sources in unknown correlated noise field was investigated. The noise is usually unknown and correlated among sensors in practical applications, especially for array with comparatively small apertures. The spatially correlated noise incurs an increase in focusing error and a severe degradation in the DOA estimation, and therefore a method of focusing transformation based on differentiating covariance matrix was proposed to eliminate noise, hence reduce the focusing error. The estimation and experimental results demonstrate the effectiveness of the proposed method.

PACS number: 43.60