TY - GEN
T1 - ARRAY GEOMETRY OPTIMIZATION FOR REGION-OF-INTEREST NEAR-FIELD BEAMFORMING
AU - Moisseev, Ron
AU - Itzhak, Gal
AU - Cohen, Israel
N1 - Publisher Copyright: © 2024 IEEE.
PY - 2024
Y1 - 2024
N2 - Microphone array geometry plays a crucial role in array signal processing and beamforming. This paper presents an array geometry optimization approach for near-field beamforming. Considering a continuous region of interest, we aim to maximize the worst-case broadband directivity of the array while ensuring sufficiently high white noise gain. We use a near-field wave propagation analysis to formulate a convex optimization problem and find the optimal linear array topology. We evaluate the performance of the proposed approach for different desired signal directions and distances and compare our results to traditional beamformers. The optimized nonuniform geometry achieves better white noise gain and higher array directivity than standard uniform linear arrays. Furthermore, the proposed method can be used for near- and far-field sources.
AB - Microphone array geometry plays a crucial role in array signal processing and beamforming. This paper presents an array geometry optimization approach for near-field beamforming. Considering a continuous region of interest, we aim to maximize the worst-case broadband directivity of the array while ensuring sufficiently high white noise gain. We use a near-field wave propagation analysis to formulate a convex optimization problem and find the optimal linear array topology. We evaluate the performance of the proposed approach for different desired signal directions and distances and compare our results to traditional beamformers. The optimized nonuniform geometry achieves better white noise gain and higher array directivity than standard uniform linear arrays. Furthermore, the proposed method can be used for near- and far-field sources.
KW - Array signal processing
KW - array geometry optimization
KW - region-of-interest near-field beamforming
UR - http://www.scopus.com/inward/record.url?scp=85195382243&partnerID=8YFLogxK
U2 - https://doi.org/10.1109/ICASSP48485.2024.10446604
DO - https://doi.org/10.1109/ICASSP48485.2024.10446604
M3 - منشور من مؤتمر
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 576
EP - 580
BT - 2024 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2024 - Proceedings
T2 - 49th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2024
Y2 - 14 April 2024 through 19 April 2024
ER -