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We consider the problem of tracking multiple targets in the presence of imperfect and incomplete ranging information using an MDS-based tracking algorithm. An advantage of this technique is that tracking accuracy is independent on target dynamics. The main feature of the aforementioned algorithm, which we proposed in an earlier work, is that tracking is performed over the eigenspace of a Nystrom-Gram...
In this paper we propose a low-complex non-parametric pre-filtering technique for Time of Arrival (TOA) based target tracking systems. The output of a wavelet transform computed on each one of the anchor-to-target links is used to estimate the noise and the dynamic for the corresponding link. Subsequently this information is used to adaptively decide on the reliability of pre-filtered data. To take...
We consider the problem of tracking multiple targets in the presence of noise and a mixture of line-of-sight (LoS) and non-line-of-sight (NLoS) conditions. The targets are assumed to describe independent trajectories with non-stationary (dynamic) statistics, i.e., with variable velocities and accelerations (limited in absolute value). These moving targets are observed by fixed anchors, which measure...
We propose a novel non-parametric solution for accurate distance-based source localization in wireless sensor networks (WSN's). The proposed technique includes a method to detect whether or not ranging is affected by bias due to non- line-of-sight (NLOS) conditions, requiring no a-priori knowledge of distance estimate statistics. Instead, we exploit the triangular inequality property of the Euclidean...
We consider the problem of tracking multiple targets in the presence of imperfect and incomplete ranging information, focusing on the impact of target dynamics. The targets are assumed to describe independent, continuous and differentiable trajectories with non-stationary (dynamic) statistics, i.e., with variable velocities and accelerations. The impact of such dynamics onto the performance, computational...
Localization and tracking (LT) algorithms for low data rate (LDR) ultra wideband (UWB) systems developed within the Integrated Project PULSERS Phase II are reviewed and compared. In particular, two localization algorithms, designed for static networks with mesh topologies, and one Tracking Algorithm, designed for dynamic network with star topologies are described and/or compared. Each of the localization...
We present a low-complexity, accurate and robust localization algorithm suitable for large scale wireless sensor networks (WSNs). The algorithm is a clusterized version of the weighted least-squares (WLS) localization technique which we recently introduced in (Destino, 2006). The WLS algorithm is a low-complexity localization technique that owes its high-accuracy to the ability to complete and approximate...
Time delay rather then throughput, is a constraint of greater importance in tracking systems. In particular, the maximum accces delay permissible by the application ins strongly related to the dynamics of theracked objects. The purpose of this article is to study the performance of a new media access control (MAC) technology specifically suited for LDR UWB systems [3] under the point of view of a...
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