| Paper ID | SAM-2.6 |
| Paper Title |
SPARSITY AND NONNEGATIVITY CONSTRAINED KRYLOV APPROACH FOR DIRECTION OF ARRIVAL ESTIMATION |
| Authors |
Hamza Baali, Hamad bin Khalifa University, Qatar; Abdesselam Bouzerdoum, University of Wollongong, Australia; Abdelkrim Khelif, Univ. Bourgogne Franche-Comté, CNRS/UFC/ENSMM/UTBM, France |
| Session | SAM-2: Direction of Arrival Estimation 2 |
| Location | Gather.Town |
| Session Time: | Tuesday, 08 June, 16:30 - 17:15 |
| Presentation Time: | Tuesday, 08 June, 16:30 - 17:15 |
| Presentation |
Poster
|
| Topic |
Sensor Array and Multichannel Signal Processing: [SAM-DOAE] Direction of arrival estimation and source localization |
| IEEE Xplore Open Preview |
Click here to view in IEEE Xplore |
| Virtual Presentation |
Click here to watch in the Virtual Conference |
| Abstract |
The conventional delay-and-sum beamforming technique results in blurred source maps due to its poor spatial resolution and high side-lobe levels. To overcome these limitations, the deconvolution approach for the mapping of acoustic sources (DAMAS) has been proposed as a postprocessing stage for image enhancement. DAMAS solves an inverse problem in the form of a system of linear equations. However, this is computationally intensive. This paper presents an approach that imposes two additional constraints to the inverse problem, namely sparsity and nonnegativity of the solution. The resulting constrained problem is solved within the Krylov projection framework. Moreover, the mapping of the sparsity penalty into the Krylov subspace is approximated by a sequence of l_2-norm problems via the iteratively reweighted norm (IRN) approach. Experimental results are presented which demonstrate the merits of the proposed method compared to several state-of-the-art approaches in terms of reconstruction accuracy and computation time. |
