Source extraction in bandwidth constrained wireless sensor networks

Hongbin Chen, Chi Kong Tse, Jiuchao Feng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

15 Citations (Scopus)

Abstract

Source extraction was traditionally done by sensor arrays. Recently, sensor networks have been considered as promising candidates for extraction of multiple sources. In a sensor network, each sensor observes an instantaneous linear mixture of the sources and their observations are corrupted by additive white Gaussian noise. Two sensor network models are adopted. The first one is cluster based, in which a sensor acts as cluster head and performs local extraction of the sources based on its own observation and the received quantized data from the cluster members. Then, the extracted signal is quantized and the quantized data are sent to the sink while the sink performs global extraction of the sources. The other one is cluster free, in which data collected by the sensors are quantized and sent to the sink directly. Then, the sink performs global extraction of the sources. The proposed schemes are evaluated against the benchmarking case where the sensor observations are undistorted.
Original languageEnglish
Pages (from-to)947-951
Number of pages5
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
Volume55
Issue number9
DOIs
Publication statusPublished - 12 Aug 2008

Keywords

  • Blind source extraction
  • Distributed estimation
  • Wireless sensor network

ASJC Scopus subject areas

  • Signal Processing
  • Electrical and Electronic Engineering

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