Abstract
A non-uniform bandwidth (NUB) spatio-temporal (ST) cone filter bank design is proposed for selectively filtering broadband three-dimensional (3D) plane waves (PWs). In the proposed structure, the tree-structured Octave filter bank in the temporal direction is employed in the analysis and synthesis part of the 3D cone filter bank. The temporal implementation of such tree-structured filter bank defines the non-uniform shape of the 3D cone filter bank in the frequency domain. Such NUB 3D cone filter banks has variety of applications where the selective filtering of space-time 3D broadband plane wave signals based on their direction of arrival is required in applications such as seismic imaging, acoustic, wireless communications, sonar imaging. Experimental results shown prove the performance of the proposed NUB 3D Cone filter bank.
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