Source localization and beamforming

摘要

Distributed sensor networks have been proposed for a wide range ofnapplications. The main purpose of a sensor network is to monitor annarea, including detecting, identifying, localizing, and tracking one ornmore objects of interest. These networks may be used by the military innsurveillance, reconnaissance, and combat scenarios or around thenperimeter of a manufacturing plant for intrusion detection. In othernapplications such as hearing aids and multimedia, microphone networksnare capable of enhancing audio signals under noisy conditions fornimproved intelligibility, recognition, and cuing for camera aiming.nPrevious developments in integrated circuit technology have allowed thenconstruction of low-cost miniature sensor nodes with signal processingnand wireless communication capabilities. These technological advancesnnot only open up many possibilities but also introduce challengingnissues for the collaborative processing of wideband acoustic and seismicnsignals for source localization and beamforming in an energy-constrainedndistributed sensor network. The purpose of this article is to provide annoverview of these issues