Source extraction in a bandwidth constrained wireless sensor network

Hongbin Chen, Chi Kong Tse, Jiuchao Feng

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)

Abstract

In this paper, we propose a blind source extraction scheme in a bandwidth constrained wireless sensor network.We consider the extraction of multiple source signals in a sensing field. Each sensor observes a linear mixture of the source signals and their observations are corrupted by additive white Gaussian noise (AWGN). First a sensor in the network acts as a cluster head and performs local extraction of the source signals using a fast fixed-point algorithmbased on its own observation and the received noisy quantized data from other sensors. Then, the extracted signals are quantized using a pulse code modulation (PCM) method and the quantized data are sent to the sink in a multi-hop way through a fading channel. Finally the sink performs global extraction of the source signals using a constant modulus algorithm(CMA) and PCM decoding. In order to improve the accuracy of source extraction, a multi-cluster structure is also proposed. Simulation results confirm effective extraction of the source signals by comparing with the case of source extraction without quantization of the sensed data.
Original languageEnglish
Title of host publicationInternational Symposium on Performance Evaluation of Computer and Telecommunication Systems 2007, SPECTS'07, Part of the 2007 Summer Simulation Multiconference, SummerSim'07
Pages69-75
Number of pages7
Publication statusPublished - 1 Dec 2007
EventInternational Symposium on Performance Evaluation of Computer and Telecommunication Systems 2007, SPECTS 2007, Part of the 2007 Summer Simulation Multiconference, SummerSim 2007 - San Diego, CA, United States
Duration: 15 Jul 200718 Jul 2007

Conference

ConferenceInternational Symposium on Performance Evaluation of Computer and Telecommunication Systems 2007, SPECTS 2007, Part of the 2007 Summer Simulation Multiconference, SummerSim 2007
Country/TerritoryUnited States
CitySan Diego, CA
Period15/07/0718/07/07

Keywords

  • Cluster
  • Correlation coefficient
  • Quantization
  • Sensor network
  • Source extraction

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Modelling and Simulation

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