Velocity Estimation Research Papers - Academia.edu (original) (raw)

Using repeated high precision GPS measurements on existing monuments, we hope to accurately determine the present day crustal strain rates in the State of Colorado on a regional and/or local scale. We will provide the first modern,... more

Using repeated high precision GPS measurements on existing monuments, we hope to accurately determine the present day crustal strain rates in the State of Colorado on a regional and/or local scale. We will provide the first modern, space-based crustal strain and surface velocity estimates for the southern Rocky Mountain region, including the Front Range and Rio Grande Rift. In addition,

A nonlinear observer for estimation of lateral and longitu- dinal velocity of automotive vehicles is proposed, based on acceleration and yaw rate measurements in addition to wheel speed and steering angle measurements. Sta- bility of the... more

A nonlinear observer for estimation of lateral and longitu- dinal velocity of automotive vehicles is proposed, based on acceleration and yaw rate measurements in addition to wheel speed and steering angle measurements. Sta- bility of the observer is proved in the form of input-to-state stability of the observer error dynamics, under an assump- tion on the friction model. This assumption

Interest is growing in the application of coherent processing of synthetic aperture radar (SAR) data to the monitoring of complex urban or infrastructure areas. However, such scenarios are characterized by the layover phenomenon, in the... more

Interest is growing in the application of coherent processing of synthetic aperture radar (SAR) data to the monitoring of complex urban or infrastructure areas. However, such scenarios are characterized by the layover phenomenon, in the presence of which conventional interferometric SAR techniques degrade or cannot operate. As a consequence, to monitor reliably a high number of ground structures, the identification, i.e., the detection and height and deformation velocity estimation, of both single and multiple scatterers interfering in the same SAR cell can be a key step. This issue is addressed here by means of differential tomography (Diff-Tomo), a recent multibaseline-multitemporal generalized interferometric framework which allows to resolve multiple moving scatterers at different heights in the same cell. In particular, superresolution adaptive Diff-Tomo is extensively tested and augmented with a new information extraction algorithm for the automated identification of the multiple scatterers. Experiments have been carried out with real C-band spaceborne data over urban areas; corresponding results are shown and discussed.

In a dynamic situation like robot soccer any individual player can only observe a limited portion of their environment at any given time. As such to develop strategies based upon planning and cooperation between different players it is... more

In a dynamic situation like robot soccer any individual player can only observe a limited portion of their environment at any given time. As such to develop strategies based upon planning and cooperation between different players it is imperative that they be able to share information which may or may not be in any individual player’s field of vision. In this paper we propose a method for multi-agent cooperation for perception based upon the Extended Kalman Filter (EKF) which enables players to track objects absent from their field of vision and also to improve the accuracy of position and velocity estimates of objects in their field of vision.

A position-based visual servo control strategy is proposed for leader-follower formation control of unmanned ground vehicles (UGVs). The proposed control law only requires the knowledge of a single known length on the leader. The relative... more

A position-based visual servo control strategy is proposed for leader-follower formation control of unmanned ground vehicles (UGVs). The proposed control law only requires the knowledge of a single known length on the leader. The relative pose and the relative velocity of the leader are estimated with respect to the follower in the follower reference frame. The relative pose and the relative velocity are obtained using a geometric pose estimation technique and a nonlinear velocity estimation strategy, respectively. A ...

Coded excitation is now a well-established technique in medical ultrasound for B-mode imaging applications. It enables a gain in depth of penetration, without sacrificing the spatial resolution and maintaining an acceptable peak intensity... more

Coded excitation is now a well-established technique in medical ultrasound for B-mode imaging applications. It enables a gain in depth of penetration, without sacrificing the spatial resolution and maintaining an acceptable peak intensity for patient safety. The rationale of this technique for velocity estimation applications still has to be formulated in more precise terms. In particular, differences in the situation that arise in color flow imaging (CFI) applications from typical B-mode imaging conditions, such as signal-to-noise ratio conditions, pulsing strategy, and safety requirements, need to be specifically addressed to assess more quantitatively the potential of this technique. This paper discusses the potential improvement in sensitivity, resolution, and statistical performance provided by coded excitation for CFI applications from theoretical considerations and simulations.