SDMA based on RF-beamforming: a switched beam versus a semi-adaptive system F.E. Fakoukakis and G.A. Kyriacou Abstract -- In this work, a system design approach for point-tomultipoint Smart Antenna architectures is presented. Two alternative configurations are studied. The first follows a fully passive approach, employing the Butler Matrix (BM) beamformer in a two-dimensional (2-D) configuration,

MIMO iterative array processing with a three-stage approach on interference elimination Yong Sun, Paul Strauch and Joe McGeehan Abstract -- It is well known that multiple-input-multiple-output (MIMO) systems promise to provide significant increases in system capacity for future wireless communication systems. However, realization of the highest potential capacity of a MIMO system will require a hi

Direction finding with a linear array using support vector machines: effects of the elevation angle and detection of scattered waves in near field conditions Matteo Pastorino and Andrea Randazzo Abstract -- A smart antenna for the estimation of the directions of arrival of electromagnetic waves is considered. The approach, which is based on a support vector regression, is studied with reference to

Compensation for element discrepancies in array development using genetic algorithms Stelios A. Mitilineos1.2, Panagiotis J. Papakanellos and Christos N. Capsalis1 Abstract -- The impact of discrepancies between idealized and realized array elements on the performance of implemented antenna arrays, compared to the theoretically expected one, is examined in this paper. A new technique for the recom

Beamforming with wide null sectors for realistic small arrays using directional weighting Ilkka Salonen', Clemens Icheln2 , Pertti Vainikainen3 Abstract -- Mutual coupling and other non-idealities are a typical source of problems in small antenna arrays. The element patterns are perturbed, which causes difficulties in standard array pattern synthesis. One common way to avoid the problems is to cor

A hybrid MoM and UTD simulation model for the performance estimation of switched parasitic arrays in indoor environments Pantelis K. Varlamos, Stelios A. Mitilineos and Christos N. Capsalis abstract -- A simulation model for deterministic channel modeling in indoor environments is used to estimate the performance of switched parasitic arrays. The model is a hybrid combination of the Method of Mome

A critical overview of analytical MIMO channel models Claude Oestges and Bruno Clerckx Abstract -- In this paper, we review a number of simplified analytical models of Rayleigh fading MIMO channels. Specifically, we highlight the assumptions behind three popular models: the Kronecker model, the virtual channel representation and the eigenbeam model. Then, we assess the quality of these models in t

System Concepts dedicated to UWB Transmitter David Marchaland1'2, Martine Villegas', Geneviève Baudoin1, Carlo Tinella2 and Didier Belot' Abstract -- This paper introduces new system concepts for an UWB transmitter architecture dedicated to 3.1-5.1GHz band. The latter is developed for an application targeting data rates up to 1Mbps, associated with localization and positioning. First, a pulse shap

Pulse-based ultra-wideband ground penetrating radar for anti-personnel landmine detection Gerald OBberger', Thomas Buchegger2 , Erwin Schimbäck3, Andreas Stelzer' and Robert Weigel' Abstract -- In this paper a complete hard- and software designed ultra-wideband (UWB) ground penetrating radar (GPR) for antipersonnel mine (APM) detection is presented. The system concept is based on transmitting sub-

On the Design of a Mixed-Signal Multi-Mode Transceiver Front-End for Cellular Terminal RFICs Gernot Hueber', Georg Strasser', Linus Maurer', Rainer Stuhlberger4, Karim Chabrak5 and Richard Hagelauer1' 3 Abstract -- Developments aimed at the software-defined-radio (SDR) concept for cellular applications have received increasing attention due to the necessity of multi-mode/multi-system capable termi