2-D DOA estimaiton based on acoustic vector-sensor array with unknown gain/phase response

摘要

An acoustic vector-sensor consists of three identical, but orthogonally oriented, acoustic velocity-sensors plus an acoustic pressure-sensor. A series of DOA estimation algorithms that exploit the vector-sensor's unique array manifold have been advanced. These algorithms, however, usually assume the acoustic-vector-sensors to have ideal gain/phase response. To accommodate any violation of these idealities, this paper proposes a joint DOA estimation and gain/phase calibration algorithm. The proposed algorithm consist of 2-step iterations. In the 18t step the 2-dimensional DOA is estimated using the ESPRIT algorithm. In the 2nd step the array's gains and phases response are estimated using the subspace method. The performance of the new method at different signal-tonoise ratio were evaluated by simulations.