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Direction-of-arrival (DOA) estimation in the presence of gain-phase errors for uniformcircular-array (UCA) is addressed in this paper. Thanks to the uniformity and cycle property of UCA, the long data vector constructed with the proper entries of the Hadamard product of autocorrelation matrix and its conjugate, can be regarded as the received data corresponding to virtual two-dimensional sources impinging on virtual multiple UCAs. This finding indicates that azimuths and elevations of virtualdoi:10.1109/access.2019.2891961 fatcat:yvdhkk644ngalgerx66thfacoe