Paper Info
Title
Cooperative synchronization and channel estimation in wireless sensor networks.
Abstract
A critical issue in applications involving networks of wireless sensors is their ability to synchronize, and mitigate the fading propagation channel effects. Especially when distributed “slave” sensors (nodes) reach-back to communicate with the “master” sensor (gateway), low power cooperative schemes are well motivated. Viewing each node as an antenna element in a multi-input multi-output (MIMO) multi-antenna system, we design pilot patterns to estimate the multiple carrier frequency offsets (CFO), and the multiple channels corresponding to each node-gateway link. Our novel pilot scheme consists of non-zero pilot symbols along with zeros, which separate nodes in a time division multiple access (TDMA) fashion, and lead to low complexity schemes because CFO and channel estimators per node are decoupled. The resulting training algorithm is not only suitable for wireless sensor networks, but also for synchronization and channel estimation of single- and multi-carrier MIMO systems. We investigate the performance of our estimators analytically, and with simulations.
Year
DOI
Venue
2005
10.1109/JCN.2005.6389813
Journal of Communications and Networks
Keywords
Field
DocType
Sensors,Channel estimation,Training,Wireless sensor networks,Synchronization,Receiving antennas,Time division multiple access
Key distribution in wireless sensor networks,Synchronization,Multi-user MIMO,Wireless,Fading,Computer science,Computer network,MIMO,Electronic engineering,Time division multiple access,Wireless sensor network
Journal
Volume
Issue
ISSN
7
3
1229-2370
Citations 
PageRank 
References 
13
1.07
0
Authors
4
Name
Order
Citations
PageRank
Mi-Kyung Oh16310.69
Xiaoli Ma253732.48
Georgios B. Giannakis32123195.50
Dong-Jo Park421633.64