Spread spectrum communications handbook (revised ed.)
Spread spectrum communications handbook (revised ed.)
Wireless sensor network survey
Computer Networks: The International Journal of Computer and Telecommunications Networking
Wireless passive sensor networks
IEEE Communications Magazine
PADRE: modulated backscattering-based passive data retrieval in wireless sensor networks
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Wake-up receivers for wireless sensor networks: benefits and challenges
IEEE Wireless Communications
Energy-efficient reservation-based medium access control protocol for wireless sensor networks
EURASIP Journal on Wireless Communications and Networking
A survey on power control issues in wireless sensor networks
IEEE Communications Surveys & Tutorials
Performance analysis of non-coherent UWB receivers at different synchronization levels
IEEE Transactions on Wireless Communications
Timing with Dirty Templates for Low-Resolution Digital UWB Receivers
IEEE Transactions on Wireless Communications
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Synchronization in physical layer of wireless sensor networks is critical in restricting complexity of tag node and power consumption. Considering the master-to-tag communication (i.e., receiving signal from a master or anchor node by tag nodes), we propose a scheme on the basis of the principles of feedback control, to transfer the signal acquisition functionality from the tag receivers to the master nodes in a cluster. Furthermore, the algorithm of timing acquisition and phase adjustment do work in the master transmitter, and the tag nodes just need feedback results of the phase detection. The tag nodes do not require complicated clock or phase adjustment circuit any more or estimation in synchronization either. Thus, this master synchronization method reduces the complexity of tag nodes and power consumption. Due to the large random time delay in the wireless feedback loop, there exists the problem of stability and convergence in the acquisition. We analyze it and present a feasible scheme for the proposed master synchronization. In order to reduce acquisition time and cost in feedback, a two-step master acquisition algorithm is proposed. The acquisition performance under nonideal channel is analyzed, and further verified by simulations.