Tracking error estimation is of great importance in global navigation satellite system (GNSS) receivers. Any inaccurate estimation for tracking error will decrease the signal tracking ability of signal tracking loops and the accuracies of position fixing, velocity determination, and timing. Tracking error estimation can be done by traditional discriminator, or Kalman filter-based pre-filter. Th...

This paper deals with the estimation of the optical aberrations of a space telescope by phase diversity. Two estimators are proposed and compared by means of simulations. The rst one, which was already implemented in the literature, is based on a joint estimation of the aberrated phase and the observed object through maximization of the generalized likelihood; the other one is a new approach, b...

A technique for simulating quantum dynamics in phase space is discussed. It makes use of ensembles of classical trajectories to approximate the distribution functions and their derivatives by implementing Adaptive Kernel Density Estimation. It is found to improve the accuracy and stability of the simulations compared to more conventional particle methods. Formulation of the method in higher dim...

This paper presents a new size estimation method that can be used to estimate size level for software engineering projects. The Algorithmic Optimisation Method is based on Use Case Points and on Multiple Least Square Regression. The method is derived into three phases. The first phase deals with calculation Use Case Points and correction coefficients values. Correction coefficients are obtained...

Threshold effects in the estimation of parameters of non–linearly modulated, continuous– time, wide-band waveforms, are examined from a statistical physics perspective. These threshold effects are shown to be analogous to phase transitions of certain disordered physical systems in thermal equilibrium. The main message, in this work, is in demonstrating that this physical point of view may be in...

Wideband SAR systems such as TerraSAR-X allow estimation of the absolute interferometric phase without resorting to error prone phase unwrapping. This is achieved through the delta-k technique that exploits frequency diversity within the range bandwidth to simulate a SAR system with a much longer carrier wavelength. This benefits all interferometric applications including DEM generation and lan...

This work is related to interfacial phase bounadry estimation in sedimentation monitoring using electrical impedance tomography. The fluid is assumed to settle into three different phases separated by sharp interfacial boundary. The time evolution of the phase interface gives important information about the sedimentation process which can be used to control and optimize the sedimentation proces...

In the software development process, effort distribution based on phase is an important but often a neglected aspect of software cost estimation. Insufficient phase effort distribution study is the primary reason of poor software effort estimation. This paper provides the results of an empirical study on phase effort distribution based on 2956 projects. The software development process is divid...

Moiré interferometry is a common tool if depth estimation from a single image frame is desired. It uses the interference of periodic patterns to measure the topology of a given surface. The actual depth estimation relies on the consistent phase estimation from the interferogram. We show that this task can be simplified by estimating the image phase and the local image orientation simultaneously...