A novel wideband DOA estimator based on Khatri-Rao subspace approach

作者：Feng Dahang; Bao Ming^*; Ye Zhongfu; Guan Luyang; Li Xiaodong

来源：Signal Processing, 2011, 91(10): 2415-2419.

DOI：10.1016/j.sigpro.2011.04.014

• Direction-of-arrival (DOA) estimation
• Wideband source
• Khatri-Rao subspace

A novel DOA estimation method for uncorrelated wideband sources named focusing Khatri-Rao subspace method (FKR) is proposed based on coherent signal-subspace method (CSM) and Khatri-Rao (KR) subspace. Compared with the conventional CSM that simply averages the covariance matrices of different frequency bins after focusing, FKR transforms the covariance matrices into a higher dimensional matrix through KR product. This method has three major advantages: (1) it achieves a higher resolution than CSM, (2) the root mean square error of DOA estimation from FKR is smaller than that of CSM when the initial angles are inaccurate and (3) it performs well even when the number of sensors is reduced to about half of the sources. The performance of the FKR method is demonstrated and analyzed through the computer simulations.

• 出版日期2011-10
• 单位中国科学院声学研究所; 中国科学技术大学