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Array signal processing with non-ideal uniform circular arrays in correlated signal environments

The Davies transformation is a method to transform the steering vector of a uniform circular array (UCA) to one with Vandermonde form. As such, it allows techniques such as spatial smoothing for direction of arrival (DOA) estimation in a correlated signal environment, developed originally for uniform linear arrays, to be applied to UCAs. However, the Davies transformation can be highly sensitive t

Experimental Validation of the Brush Tire Model

The paper contains an experimental validation of the physically based brush-tire model toward the tire behavior in a number of different realistic conditions. Results of measurements performed with summer, winter, and studded tires on different road foundations such as wet and dry asphalt, basalt, snow, and ice are presented. The purpose behind the validation is to study the possibilities of using

Experiences from the Architectural Change Process

A good software architecture is becoming recognized as a major factor for successful products. There has been much research on the technical aspects of software architecture and it is recognized that the driving requirements for architectures are "non-functional", but few have studied how organizations decide on architectural changes. In this paper we study the topic through several case studies.