In this thesis, we consider a distributed detection problem in wireless sensor networks (WSNs)
using ultrawide bandwidth (UWB) communications. Due to the severe restrictions on power
consumption, energy efficiency becomes a critical design issue in WSNs. UWB technology
has low-power transceivers, low-complexity and low-cost circuitry which are well suited to the
physical layer requirements for WSNs. In a typical parallel fusion network, local decisions are
made by local sensors and transmitted through a wireless channel to a fusion center, where
the final decision is made. In this thesis, we control the number of UWB pulses to achieve
the energy efficient distributed detection. We first theoretically characterize the performance
of distributed detection using UWB communications. Both AWGN and fading channels are
considered. Based on the analysis, we then obtain the minimum number of the pulses per
detection to meet the required performance. To achieve a near-optimal design, we further
propose a multiple access technique based on the random number of UWB pulses. Finally, the
performance evaluation is provided to demonstrate the advantage of our design.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0804108-183431 |
| Date | 04 August 2008 |
| Creators | Chang, Yung-Lin |
| Contributors | Chin-Liang Wang, Chih-Peng Li, Char-Dir Chung, Tsang-Yi Wang, Ding-Bing Lin |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0804108-183431 |
| Rights | withheld, Copyright information available at source archive |
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