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Localization is an important research problem in WSNs (wireless sensor networks) and many WSN localization algorithms have been proposed in the literature. For a single sensor node whose anchors' positions are known, the location estimation error lower bound can be computed by using the CRLB (Cramer-Rao Lower Bound). However, it is still unclear to the research community what the localization error...
Localization is an important research issue in Wireless Sensor Networks (WSNs). Recently, hop-count-based localization has been proposed as a cost-effective alternative to range-based localization algorithms. Traditionally, hop-counts between any pair of nodes can only take on integer values regardless of relative positions of nodes in the hop. We show that by partitioning a node's one-hop neighbor...
Target tracking is one of the very important applications of WSNs (wireless sensor networks). Traditionally, Kalman filter and its derivatives are some of the most popular algorithms in solving the signal tracking problem. In a WSNs tracking application, the target motion/state update dynamics might be linear or nonlinear depending on the specific scenario. The observation model might vary across...
PAssive Synthetic Aperture (PASA) is a technique of increasing the length of a small array artificially through array towing motion and signal processing. This allows the user to obtain the advantage of a long array while maintaining the maneuverability of a short array. In recent years, there have been keen interests in improving the ETAM technique to overcome its disadvantage. In this paper, the...
Large rivers of the world are difficult to investigate. This is essentially due to the logistical problems involved when attempting to study rivers that are about a thousand kilometres or more in length and drain basins of appropriate dimensions. This creates difficulties in river management and also in determining the possible impact on the river system of specific development projects or basin land-use...
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