Distributed Estimation of Static Fields in Wireless Sensor Networks Using the Finite Element Method
The recent advent of Wireless Sensor Networks (WSNs) offers a significantly different yet attractive approach to field estimation. Indeed, the dense deployment of sensor nodes inside a spatially distributed field makes it possible to collect a large number of local field estimates which can then be gathered in a fusion center for global field reconstruction. However, a fundamental issue with this approach is how to estimate field values at locations different from the WSN sensor node locations. A naive approach would be to interpolate the field values estimated at the sensor node locations to obtain field values at arbitrary locations, yet the choice of the interpolant will then carry an implicit assumption on the spatiotemporal variation of the field.