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Fundamental Limitations for DOA Estimation by a Sphere

In this paper we consider fundamental limitations for DOA estimation with arbitrary lossless antennas or antenna arrays inserted inside a sphere. Spherical vector modes and their associated equivalent circuits and Q factor approximations are employed as a general framework for the analysis. The classical broadband matching theory by Fano is extended to a general multiport S–parameter model of the

Beamforming Transmitter IC at 8-GHz in 130-nm CMOS

An 8-GHz beamforming transmitter IC has been designed in a 130-nm CMOS process. Two power amplifiers with independently controllable phase enable the beamforming. The phases are digitally controllable over the full 360◦ range, which is accomplished by binary weighting of quadrature phase signals in the power amplifiers. The quadrature phase signals are generated by a quadrature voltage controlled

Towards modeling guidelines for capturing the cost of improving software product quality in release planning

Quality requirements complement functional requirements with information on the target quality levels of software functions or emergent system quality aspects. In release planning the allocation of development effort in further investments into product enhancements, new or enhanced functions are competing with quality improvements for limited resources. When setting balanced quality targets for de

The First dual-mode distance learning benchmarking club - report from Lund University, Sweden

In 2009 Lund University was invited to participate in the international project the First dual-mode distance learning benchmarking club. From past experiences Lund University was asked to make a concordance between different benchmarking models and their criteria in relation to another widely used model, Pick&Mix. The task was also to suggest improvements of the Pick&Mix model and to sugge