Comments on 'Pair-Matching Method for Estimating 2-D Angle of Arrival With a Cross-Correlation Matrix'

Summary form only given: This paper proposed a new pair-matching method which is suitable for the signal impinged on the array from direction at elevation angle thetas and azimuth angle Phi. This new method exploits the cross-correlation matrix of two received signals impinging on two uniform linear arrays (ULAs). However this method is valid only in some specific directions of the impinging signals. To refine the work presented in paper, we have made the following comments.