Title page for ETD etd-07082007-222626


Type of Document Master's Thesis
Author Wang, Dimeng
Author's Email Address dwang3@lsu.edu
URN etd-07082007-222626
Title Sigma-Delta Modulation Based Distributed Detection in Wireless Sensor Networks
Degree Master of Science in Electrical Engineering (M.S.E.E.)
Department Electrical & Computer Engineering
Advisory Committee
Advisor Name Title
Shuangqing Wei Committee Chair
Guoxiang Gu Committee Co-Chair
Ashok Srivastava Committee Member
Keywords
  • Sigma-Delta modulation
  • wireless sensor networks
  • distributed detection
Date of Defense 2007-05-01
Availability unrestricted
Abstract
We present a new scheme of distributed detection in sensor networks using Sigma-Delta modulation. In the existing works local sensor nodes either quantize the observation

or directly scale the analog observation and then transmit the processed information

independently over wireless channels to a fusion center. In this thesis we exploit the advantages

of integrating modulation as a local processor into sensor design and propose a

novel mixing topology of parallel and serial configurations for distributed detection system,

enabling each sensor to transmit binary information to the fusion center, while preserving

the analog information through collaborative processing. We develop suboptimal fusion

algorithms for the proposed system and provide both theoretical analysis and various simulation

results to demonstrate the superiority of our proposed scheme in both AWGN and

fading channels in terms of the resulting detection error probability by comparison with

the existing approaches.

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