The ability to predict transmission loss or field strength distribution is crucial for determining coverage in planning personal communication systems. This paper presents a practical method to accurately predict entire average transmission loss distribution in complicated urban environments. The method uses a 3D propagation model based on radiosity and a simplified city information database in...

This paper focuses on the performance achievable by spaceborne Synthetic Aperture Radar Interferometry (InSAR) in the estimation of line-of-sight crustal deformations from acquisitions over a distributed scatterer. Our model is suited for exploiting the Hybrid Cramér-Rao Bound (HCRB), where the unknowns are both deterministic parameters and stochastic variables. We take into account both target...

In the original version of the lion and man game, a lion tries to capture a man who is trying to escape in a circular arena. The players have equal speeds. They can observe each other at all times. We study a new variant of the game in which the lion has only line-of-sight visibility. That is it can observe the man’s position only if the line segment connecting them does not intersect the bound...

This paper introduces an adaptive guidance law for intercepting a maneuvering target using information from an imaging seeker. The relative missile-target kinematics is represented in the line-of-sight (LOS) frame and the image information instead of the relative range is introduced to formulate the interception problem as an adaptive control problem with an unknown control coefficient. Conside...

Non-line-of-sight (NLOS) geolocation becomes an important issue with the fast development of mobile communications in recent years. Several methods have been proposed to address this problem. However, a comprehensive study on the best geolocation accuracy that these methods may possibly achieve is called for. In [1], [2], we reported a unified analysis of the CramerRao Lower Bound (CRLB) and ac...

Human body effects such as antenna-body interaction and scattering caused by pedestrian movement are important indoor radio propagation phenomena at microwave frequencies. This paper reports measurements and statistical analysis of the indoor narrowband propagation channel at 5.2 GHz for two scenarios: a fixed line-of-sight (LOS) link perturbed by pedestrian movement, and a mobile link incorpor...

The Sowerby Research Centre of British Aerospace has developed an infrared predictive code, SIRUS, which models the signature of an air platform. We review briefly this code, and proceed to the calculation in code SCATAX of gas radiative transfer in a plume containing scattering particles. An accurate radiative-transfer calculation of the signature of plume containing scattering particles is co...

We consider the possibility that the Galactic neutral hydrogen stream Complex A and the stellar Orphan stream are related, and use this hypothesis to determine possible distances to Complex A and the Orphan stream, and line-of-sight velocities for the latter. The method presented uses our current knowledge of the projected positions of the streams, as well as lineof-sight velocities for Complex...

In this paper, empirical channel models and parameters are derived from the wideband measured data at 5.3 GHz in outdoor mobile communications. The path loss exponents and intercepts are obtained by using the least square method. The mean excess delay and mean root-mean-square (rms) delay spread are within 29–102 ns and 22–88 ns, respectively. The correlation distances and bandwidths are within...