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Real time magnetic resonance (MR) thermometry is gaining clinical importance for monitoring and guiding high intensity focused ultrasound (HIFU) ablations of tumorous tissue. The temperature information can be employed to adjust the position and the power of the HIFU system in real time and to determine the therapy end-point. However, the precision of real time MR-thermometry is generally limited...
The recent demonstration of precise ranging measurements through low power Low Data Rate (LDR) Impulse Radio - Ultra Wideband (IR-UWB) communications has disclosed new perspectives for cooperative location-enabled wireless networks. With this respect, joint ranging and distributed positioning mechanisms supported by specific protocol transactions have already been proposed within user-centric infrastructureless...
Popular linearized estimators such as the Extended Kalman Filter (EKF) or the one-step linearized Least Squares (LS) estimator, which have been used for years to solve positioning and tracking problems in location-enabled wireless networks, require that available observations are locally linearized (as functions of estimated variables) around the predicted state or initial optimization guess. In most...
As a growing attention is currently paid to low-cost energy-efficient radiolocation functionalities in a wide variety of wireless networks, one recurrent concern is to reduce the required processing time and the complexity of practical positioning estimators under deployment constraints (i.e. in terms of infrastructure, embedded computational capability and/or available measurements), while meeting...
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