This paper deals with the design of channel estimators in the uplink of an OFDM based multi-user system. First, we propose a user allocation scheme that is based on the aim to use the correlation of the radio channel for channel estimation purposes. Further, we present the linear MMSE channel estimator based on a few pilot tones. We present an error analysis that proves valuable in the evaluation

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To obtain high performance control of a dc-dc converter, a good model of the converter is needed. It is suitable to consider the load to be included in the converter model since it usually affects the dynamics. The load is often the most variable part of this system. If the load current and the output voltage are measured there are good possibilities to obtain a good model of the load on-line. Ada

Measurements and extraction of Q-value and self-resonance frequency of on-chip differential symmetrical inductors have been performed. Both 1-port and 2-port measurements have been carried out. In the 1-port measurements a high frequency broadband 180

Intumescent coating is an important fire protection method for steel structures. Traditionally its fire properties have been evaluated by performing furnace tests using a standardized test procedure and following a standardized time-temperature curve. This procedure is restrictive in performance based fire safety engineering design since it limits the fire condition to the standard one only. In th

This monograph builds a new approach to the interaction of gender systems with socioeconomic and environmental changes, and applies this approach in the analysis of regional trends in Latin America over the past 25 years, together with national and territorial analyses. The book’s main objectives are to advance a theoretical and methodological approach not found in other studies of socioeconomic a

Popular Abstract in Swedish Förutsättningar för gymnasieelevers kunskapsbildning och för undervisning inom miljöområdet. Miljöområdet är flervetenskapligt och komplexiteten i frågeställningarna är uppenbara. Utgångspunkten i avhandlingen är att anlägga ett pedagogiskt perspektiv på detta kunskapsområde. I boken ingår en undersökning av gymnasieelevers miljötänkande, och på vilket sätt skolans unConditions to promote students' knowledge and education about environment The objectives of this Study are: · To describe and analyse the development of students' knowledge about the environment · To elucidate the nature of student thinking about the environment and, from the findings, to suggest the potential of Environmental Education Environmental education is multi-disciplinary and complex.