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We propose a novel distributed on-line expectation maximization method for passive target localization in wireless sensor networks where multiple sensors cooperate to process the location information obtained from the radio signal transmitted by the target. We consider the scenario where few or no sensors receive line of sight signals. Each sensor computes the time difference of arrival of the target's...
We consider the problem of localizing two sensors using signals-of-opportunity from beacons with known positions. Beacons and sensors have asynchronous local clocks or oscillators with unknown clock skews and offsets. We analyze the biases introduced by clock asynchronism in the received signals, and derive the Cramér-Rao lower bound (CRLB) for sensor position and velocity estimation errors. We quantify...
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