Title :
Bayesian Focusing Transformation for coherent wideband array processing
Author :
Buchris, Y. ; Cohen, I. ; Doron, M.A.
Author_Institution :
Dept. of Electr. Eng., Technion - Israel Inst. of Technol., Haifa, Israel
Abstract :
In this paper, we develop a Bayesian focusing transformation (BFT) for wideband array processing which utilizes a weighted extension of the wavefield interpolated narrowband generated subspace (WINGS) focusing approach, also derived here. The BFT minimizes the mean-square error of the transformation, thus, achieving improved focusing accuracy over the entire bandwidth. We also propose a time progressing Bayesian focused beamformer which incorporates a direction finding stage. Experimental results demonstrate the performance of the BFT compared to other focusing schemes and show some of the benefits achieved by the BFT in adaptive beamforming applications.
Keywords :
Bayes methods; array signal processing; mean square error methods; Bayesian focusing transformation; adaptive beamforming techniques; coherent wideband array processing; mean-square error; wavefield interpolated narrowband generated subspace; Array signal processing; Bandwidth; Bayesian methods; Convergence; Direction of arrival estimation; Frequency domain analysis; Interpolation; Narrowband; Solid modeling; Wideband; Bayesian approach; MVDR; adaptive beamforming; direction finding;
Conference_Titel :
Electrical and Electronics Engineers in Israel, 2008. IEEEI 2008. IEEE 25th Convention of
Conference_Location :
Eilat
Print_ISBN :
978-1-4244-2481-8
Electronic_ISBN :
978-1-4244-2482-5
DOI :
10.1109/EEEI.2008.4736575
