Harry L Van Trees. Optimum array processing[M]. New York: John Wiley and Sons, Inc, 2002. [2] Nagesha V, Kay S. Maximum likelihood estimation for array processing in colored noise[J]. IEEE Transactions on Signal Processing, 1996,44(2):169-180. [3] Friedlander B, Weiss A J. Direction finding using noise covariance modeling [J]. IEEE Transactions on Signal Processing, 1995,43(7):1557-1567. [4] Michael Schoor, Bin Yang. Subspace based DOA estimation in the presence of correlated signals and model errors[C].ICASSP 2009: 2161-2164. [5] Zhou C G, Haber F. The resolution threshold of MUSIC with unknown spatially colored noise[J],IEEE Trans. SP, 1993, 41(1):511-516. [6] 金勇,黄建国,张立杰.宽带信号近似最大似然方位估计快速算法[J].航空学报,2008,29(5):1264-1268. [7] Araki S, Sawada H, Mukai R, et al. DOA Estimation for multiple sparse sources with normalized observation vector clustering[C].ICASSP 2006:533-536. [8] WU Yun-tao, HOU Chao-huan, LIAO Gui-sheng. Direction-of-arrival estimation in the presence of unknown non-uniform noise fields[J]. IEEE Journal of oceanic engineering, 2006,31(2):504-510.