| Paper ID | SAM-6.3 |
| Paper Title |
WINDOW BEAMFORMER FOR SPARSE CONCENTRIC CIRCULAR ARRAY |
| Authors |
Rajib Sharma, Israel Cohen, Baruch Berdugo, Technion - Israel Institute of Technology, Israel |
| Session | SAM-6: Beamforming 1 |
| Location | Gather.Town |
| Session Time: | Thursday, 10 June, 14:00 - 14:45 |
| Presentation Time: | Thursday, 10 June, 14:00 - 14:45 |
| Presentation |
Poster
|
| Topic |
Sensor Array and Multichannel Signal Processing: [SAM-MAPR] Microphone array processing |
| IEEE Xplore Open Preview |
Click here to view in IEEE Xplore |
| Virtual Presentation |
Click here to watch in the Virtual Conference |
| Abstract |
This work proposes a practical fixed beamformer for a sparse concentric circular array (CCA) of microphones. Firstly, a method is proposed which enables the reduction of the number of microphones in a CCA based on the optimal placement of the microphones to maximize the directivity-factor (DF). Thereafter, a beamformer is derived which strives to obtain a beamwidth that is not smaller than a desired target beamwidth (in both the elevation and azimuth) without neglecting the DF and white-noise-gain (WNG) across the speech spectrum. The proposed beamformer weights the microphones based on their corresponding ring number or radius, and further uses a Gaussian-window function to emphasize the microphones which are aligned with the direction-of-arrival of the signal. The results showcase the superiority of the proposed Gaussian-window (GW) beamformer over known solutions. |
