Talks and Poster Presentations (with Proceedings-Entry):
G. Reise, G. Matz:
"Optimal Transmit Power Allocation in Wireless Sensor Networks Performing Field Reconstruction";
Poster: IEEE Int. Conference on Acoustics, Speech, and Signal Processing (ICASSP 2012),
Kyoto, Japan;
2012-03-25
- 2012-03-30; in: "Proc. IEEE Int. Conference on Acoustics, Speech, and Signal Processing (ICASSP 2012)",
IEEE,
(2012),
3105
- 3108.
English abstract:
In our previous work, we developed efficient field reconstruction methods in wireless sensor networks. In this paper, we use an amplify-and-forward to transmit the sensor measurements to the fusion center and we derive the mean square error (MSE) of the reconstructed field as a function of the measurement and receive SNR and of the sensor positions. We propose to allocate the sen- sor node transmit powers such that the sum power is minimized subject to an MSE target and we phrase this approach as a convex optimization problem that can be numerically solved in an efficient manner. For the case of critical sampling we derive a closed-form expression for the optimal power allocation. We illustrate the power savings achieved with the proposed power allocation schemes both for Gaussian and Rayleigh fading channels.
Keywords:
Wireless sensor network, field reconstruction, power allocation
Electronic version of the publication:
http://publik.tuwien.ac.at/files/PubDat_203854.pdf
Created from the Publication Database of the Vienna University of Technology.