Consensus and EM Based Sensor Registration in Distributed Sensor Networks

The conventional approaches to the sensor registration problem require a centralized processing structure. This demand cannot be met in the distributed sensor network (DSN). In this paper, we address this sensor registration problem in the DSN. For this purpose, we embed the consensus algorithm into the expectation maximization (EM) iteration procedure such that the conditional expectation of the log-likelihood function can be evaluated in a fully distributed way. Thus each sensor can obtain its estimated bias. Simulations are performed in order to demonstrate the effectiveness of the proposed algorithms.