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- W3154244444 abstract "Solutions for frequency-invariant or constant-beamwidth beamforming with concentric circular arrays (CCAs) generally control only the azimuth-beampattern. This work introduces a beamforming methodology, which instead of designing a fixed beamwidth across the spectrum, maximizes the directivity-factor under the constraint that the beamwidth is greater than or equal to a pre-defined target-beamwidth, in both the elevation and the azimuth. The principal idea lies in dynamically weighting the microphones of the CCA based on two factors - (i) their corresponding ring number or radius, and (ii) their alignment with the signal-path. The parameters controlling the weights are determined using a modified gradient-descent algorithm. Experimental results show the flexibility and advantage of the proposed methodology over state-of-the-art methods." @default.
- W3154244444 created "2021-04-26" @default.
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- W3154244444 date "2021-01-01" @default.
- W3154244444 modified "2023-09-29" @default.
- W3154244444 title "Controlling Elevation and Azimuth Beamwidths With Concentric Circular Microphone Arrays" @default.
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- W3154244444 doi "https://doi.org/10.1109/taslp.2021.3072275" @default.
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