ECE Seminar* Speaker: Dr. John R. Buck, ECE Department, UMASS Dartmouth
When: Friday,
October 19, 2018
2:00 PM
-
4:00 PM
Where: Science & Engineering Building, Lester W. Cory Conference Room: Room 213A
Cost: Free
Description: Topic: A Performance-Weighted Blended Dominant Mode Rejection Beamformer
Location: DION Building, Room 109
Abstract:
Adaptive beamformers operating in snapshot deficient situations often estimate regularization parameters such as the diagonal-loading level or the signal subspace dimension. We propose a new beamformer that avoids this problem by computing its array weights as a mixture of the array weights for a competing set of beamformers. The new beamformer's time-average output power asymptotically approaches the best performance of any of the beamformers in the set. Applying this technique to the Dominant Mode Rejection (DMR) beamformer obviates the need to estimate the dominant signal subspace dimension. An example simulation of a complicated passive sonar scenario illustrates that the blended beamformer's performance rivals the performance of the best fixed subspace DMR beamformer, and may outperform all of them in nonstationary environments.
Biography:
John R. Buck received his Ph.D. from the MIT/WHOI Joint Program in Oceanographic and Electrical Engineering in 1996. He joined the faculty of UMass Dartmouth later that year, and is presently a Professor in the ECE Dept. He is a a Fellow of the Acoustical Society of America and a past recipient of the UMass Manning Prize for Excellence in Teaching (2016), the IEEE Education Society's Mac Van Valkenburg Early Career Teaching Award (2005), the UMass Dartmouth Faculty Federation Leo M. Sullivan Teacher of the Year Award (2008), the ONR Young Investigator Award (2000) and the NSF CAREER award (1998). His research interests include array processing, underwater acoustics, animal bioacoustics and engineering pedagogy.
The Seminars is open to the public free of charge.
*For further information, please contact Dr. Honggang Wang at 508.999.8469, or by via email at hwang1@umassd.edu.
Location: DION Building, Room 109
Abstract:
Adaptive beamformers operating in snapshot deficient situations often estimate regularization parameters such as the diagonal-loading level or the signal subspace dimension. We propose a new beamformer that avoids this problem by computing its array weights as a mixture of the array weights for a competing set of beamformers. The new beamformer's time-average output power asymptotically approaches the best performance of any of the beamformers in the set. Applying this technique to the Dominant Mode Rejection (DMR) beamformer obviates the need to estimate the dominant signal subspace dimension. An example simulation of a complicated passive sonar scenario illustrates that the blended beamformer's performance rivals the performance of the best fixed subspace DMR beamformer, and may outperform all of them in nonstationary environments.
Biography:
John R. Buck received his Ph.D. from the MIT/WHOI Joint Program in Oceanographic and Electrical Engineering in 1996. He joined the faculty of UMass Dartmouth later that year, and is presently a Professor in the ECE Dept. He is a a Fellow of the Acoustical Society of America and a past recipient of the UMass Manning Prize for Excellence in Teaching (2016), the IEEE Education Society's Mac Van Valkenburg Early Career Teaching Award (2005), the UMass Dartmouth Faculty Federation Leo M. Sullivan Teacher of the Year Award (2008), the ONR Young Investigator Award (2000) and the NSF CAREER award (1998). His research interests include array processing, underwater acoustics, animal bioacoustics and engineering pedagogy.
The Seminars is open to the public free of charge.
*For further information, please contact Dr. Honggang Wang at 508.999.8469, or by via email at hwang1@umassd.edu.
Contact:
ECE: Electrical & Computer Engineering Department 508.999.9164 http://www.umassd.edu/engineering/ece/
Topical Areas: General Public, University Community, College of Engineering, Electrical and Computer Engineering