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Convolutional Beamspace Using IIR Filters

Chen, Po-Chih and Vaidyanathan, P. P. (2022) Convolutional Beamspace Using IIR Filters. In: 2022 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2022). IEEE , Piscataway, NJ, pp. 5003-5007. ISBN 978-1-6654-0540-9.

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The recently introduced convolutional beamspace (CBS) method has some advantages over traditional beamspace methods in array processing. This paper introduces a variant which uses IIR instead of FIR filters in the convolutional layer. In CBS, the sources falling in the stopband are assumed to be sufficiently attenuated so that we can identify the pass-band DOAs. An IIR filter often requires a much lower order for the same set of magnitude response specifications. Hence, the computational complexity of IIR-CBS can be smaller than FIR-CBS. Moreover, IIR-CBS can even give smaller DOA estimation errors than FIR-CBS because the longer FIR filter length means shorter steady-state filter output length, which leads to larger estimation errors. The advantages of IIR-CBS are verified by numerical examples.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Chen, Po-Chih0000-0003-1637-9329
Vaidyanathan, P. P.0000-0003-3003-7042
Additional Information:© 2022 IEEE. This work was supported by the Office of Naval Research grant N00014-21-1-2521, and the California Institute of Technology.
Funding AgencyGrant Number
Office of Naval Research (ONR)N00014-21-1-2521
Subject Keywords:Convolutional beamspace, IIR filters, root-MUSIC, ESPRIT
Record Number:CaltechAUTHORS:20220624-4393200
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Official Citation:P. -C. Chen and P. P. Vaidyanathan, "Convolutional Beamspace Using IIR Filters," ICASSP 2022 - 2022 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2022, pp. 5003-5007, doi: 10.1109/ICASSP43922.2022.9746961
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:115254
Deposited By: Tony Diaz
Deposited On:24 Jun 2022 22:26
Last Modified:28 Jun 2022 19:20

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