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Distributed Node-Specific LCMV Beamforming in Wireless Sensor Networks | IEEE Journals & Magazine | IEEE Xplore

Distributed Node-Specific LCMV Beamforming in Wireless Sensor Networks


Abstract:

In this paper, we consider the linearly constrained distributed adaptive node-specific signal estimation (LC-DANSE) algorithm, which generates a node-specific linearly co...Show More

Abstract:

In this paper, we consider the linearly constrained distributed adaptive node-specific signal estimation (LC-DANSE) algorithm, which generates a node-specific linearly constrained minimum variance (LCMV) beamformer, i.e., with node-specific linear constraints, at each node of a wireless sensor network. The algorithm significantly reduces the number of signals that are exchanged between nodes, and yet obtains the optimal LCMV beamformers as if each node has access to all the signals in the network. We consider the case where all the steering vectors are known, as well as the blind beamforming case where the steering vectors are not known. We formally prove convergence and optimality for both versions of the LC-DANSE algorithm. We also consider the case where nodes update their local beamformers simultaneously instead of sequentially, and we demonstrate by means of simulations that applying a relaxation is often required to obtain a converging algorithm in this case. We also provide simulation results that demonstrate the effectiveness of the algorithm in a realistic speech enhancement scenario.
Published in: IEEE Transactions on Signal Processing ( Volume: 60, Issue: 1, January 2012)
Page(s): 233 - 246
Date of Publication: 26 September 2011

ISSN Information:

Author image of Alexander Bertrand
Department of Electrical Engineering, ESATSCD, Katholieke Universiteit Leuven, Leuven, Belgium
Alexander Bertrand (M'08) received the M.Sc. degree and the Ph.D. degree in electrical engineering, both from the Katholieke Universiteit Leuven, Belgium, in 2007 and 2011, respectively.
He is currently a Postdoctoral Fellow of the Research Foundation—Flanders (FWO), affiliated with the Electrical Engineering Department (ESAT), Katholieke Universiteit Leuven. In 2010, he was a visiting researcher with the Adaptive Systems ...Show More
Alexander Bertrand (M'08) received the M.Sc. degree and the Ph.D. degree in electrical engineering, both from the Katholieke Universiteit Leuven, Belgium, in 2007 and 2011, respectively.
He is currently a Postdoctoral Fellow of the Research Foundation—Flanders (FWO), affiliated with the Electrical Engineering Department (ESAT), Katholieke Universiteit Leuven. In 2010, he was a visiting researcher with the Adaptive Systems ...View more
Author image of Marc Moonen
Department of Electrical Engineering, ESATSCD, Katholieke Universiteit Leuven, Leuven, Belgium
Marc Moonen (M'94–SM'06–F'07) received the electrical engineering degree and the Ph.D. degree in applied sciences from Katholieke Universiteit Leuven (KU Leuven), Belgium, in 1986 and 1990, respectively.
Since 2004, he has been a Full Professor with the Electrical Engineering Department, KU Leuven, where he heads a research team working in the area of numerical algorithms and signal processing for digital communications, w...Show More
Marc Moonen (M'94–SM'06–F'07) received the electrical engineering degree and the Ph.D. degree in applied sciences from Katholieke Universiteit Leuven (KU Leuven), Belgium, in 1986 and 1990, respectively.
Since 2004, he has been a Full Professor with the Electrical Engineering Department, KU Leuven, where he heads a research team working in the area of numerical algorithms and signal processing for digital communications, w...View more

Author image of Alexander Bertrand
Department of Electrical Engineering, ESATSCD, Katholieke Universiteit Leuven, Leuven, Belgium
Alexander Bertrand (M'08) received the M.Sc. degree and the Ph.D. degree in electrical engineering, both from the Katholieke Universiteit Leuven, Belgium, in 2007 and 2011, respectively.
He is currently a Postdoctoral Fellow of the Research Foundation—Flanders (FWO), affiliated with the Electrical Engineering Department (ESAT), Katholieke Universiteit Leuven. In 2010, he was a visiting researcher with the Adaptive Systems Laboratory, University of California, Los Angeles (UCLA). His research interests are in multichannel signal processing, ad hoc sensor arrays, wireless sensor networks, distributed signal enhancement, speech enhancement, and distributed estimation.
Dr. Bertrand received a Postdoctoral Fellowship from the Research Foundation—Flanders (FWO) (2011–2014), a Ph.D. scholarship of the Institute for the Promotion of Innovation through Science and Technology in Flanders (IWT-Vlaanderen) (2008–2011), and a travel grant from FWO for a Visiting Research Collaboration at UCLA (2010).
Alexander Bertrand (M'08) received the M.Sc. degree and the Ph.D. degree in electrical engineering, both from the Katholieke Universiteit Leuven, Belgium, in 2007 and 2011, respectively.
He is currently a Postdoctoral Fellow of the Research Foundation—Flanders (FWO), affiliated with the Electrical Engineering Department (ESAT), Katholieke Universiteit Leuven. In 2010, he was a visiting researcher with the Adaptive Systems Laboratory, University of California, Los Angeles (UCLA). His research interests are in multichannel signal processing, ad hoc sensor arrays, wireless sensor networks, distributed signal enhancement, speech enhancement, and distributed estimation.
Dr. Bertrand received a Postdoctoral Fellowship from the Research Foundation—Flanders (FWO) (2011–2014), a Ph.D. scholarship of the Institute for the Promotion of Innovation through Science and Technology in Flanders (IWT-Vlaanderen) (2008–2011), and a travel grant from FWO for a Visiting Research Collaboration at UCLA (2010).View more
Author image of Marc Moonen
Department of Electrical Engineering, ESATSCD, Katholieke Universiteit Leuven, Leuven, Belgium
Marc Moonen (M'94–SM'06–F'07) received the electrical engineering degree and the Ph.D. degree in applied sciences from Katholieke Universiteit Leuven (KU Leuven), Belgium, in 1986 and 1990, respectively.
Since 2004, he has been a Full Professor with the Electrical Engineering Department, KU Leuven, where he heads a research team working in the area of numerical algorithms and signal processing for digital communications, wireless communications, DSL, and audio signal processing.
Dr. Moonen received the 1994 KU Leuven Research Council Award, the 1997 Alcatel Bell (Belgium) Award (with P. Vandaele), the 2004 Alcatel Bell (Belgium) Award (with R. Cendrillon), and was a 1997 “Laureate of the Belgium Royal Academy of Science.” He received the Best Paper Award from the IEEE Transactions on Signal Processing (with G. Leus) and from the Elsevier Signal Processing (with S. Doclo). He was chairman of the IEEE Benelux Signal Processing Chapter (1998–2002), and is currently President of European Association for Signal Processing (EURASIP). He has served as Editor-in-Chief for the EURASIP Journal on Applied Signal Processing (2003–2005), and was a member of the editorial board of the IEEE Transactions on Circuits and Systems II (2002–2003), IEEE Signal Processing Magazine (2003–2005), and Integration, the VLSI Journal. He is currently a member of the editorial board of the EURASIP Journal on Advances in Signal Processing, IEEE Signal Processing Magazine, and Signal Processing.
Marc Moonen (M'94–SM'06–F'07) received the electrical engineering degree and the Ph.D. degree in applied sciences from Katholieke Universiteit Leuven (KU Leuven), Belgium, in 1986 and 1990, respectively.
Since 2004, he has been a Full Professor with the Electrical Engineering Department, KU Leuven, where he heads a research team working in the area of numerical algorithms and signal processing for digital communications, wireless communications, DSL, and audio signal processing.
Dr. Moonen received the 1994 KU Leuven Research Council Award, the 1997 Alcatel Bell (Belgium) Award (with P. Vandaele), the 2004 Alcatel Bell (Belgium) Award (with R. Cendrillon), and was a 1997 “Laureate of the Belgium Royal Academy of Science.” He received the Best Paper Award from the IEEE Transactions on Signal Processing (with G. Leus) and from the Elsevier Signal Processing (with S. Doclo). He was chairman of the IEEE Benelux Signal Processing Chapter (1998–2002), and is currently President of European Association for Signal Processing (EURASIP). He has served as Editor-in-Chief for the EURASIP Journal on Applied Signal Processing (2003–2005), and was a member of the editorial board of the IEEE Transactions on Circuits and Systems II (2002–2003), IEEE Signal Processing Magazine (2003–2005), and Integration, the VLSI Journal. He is currently a member of the editorial board of the EURASIP Journal on Advances in Signal Processing, IEEE Signal Processing Magazine, and Signal Processing.View more

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