空域未知相关噪声环境下的波达方向估计新方法

new method of direction of arrival (DOA) estimation is proposed in the presence of Spatially Unknown Correlated noise. The method uses two arrays which are far away from each other to receive signals. Although the noises received by the elements of an array are spatially correlated, the noises are uncorrelated between the two arrays since they are far away from each other. The influence of the Spatially Unknown Correlated noise to the DOA estimation is eliminated by using the cross-correlation of the signals received by the two arrays. The cross-correlation matrices are averaged over time to construct a virtual correlation matrix of full rank. The DOA is finally estimated by using the method of eigendecomposion to the virtual correlation matrix. Simulation results show that the proposed method can find the accurate DOA of the signal in the presence of the Spatially Unknown Correlated noise, and then completes the localization of the signal source.