Acknowledgement
This work is funded by the National Natural Science Foundation of China, Grant Numbers 61971217, 61971218, and 61631020; the fund of Sonar Technology Key Laboratory (research on the theory and algorithm of signal processing for two-dimensional underwater acoustics coprime array); and the graduate innovative base (laboratory) open fund of Nanjing University of Aeronautics and Astronautics, Grant Number: kfjj20200421.
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