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Flexible baseband transmitter for OFDM

To fully utilize the available spectrum for a wireless communication system it is feasible to adapt to different situations on the channel. In this paper a flexible OFDM transmitter is presented together with basic theory behind OFDM transmission. It is shown that high flexibility can be obtained with a reasonable amount of additional hardware. Part of the design, the FFT-processor, has already be

TrueTime: simulation of networked computer control systems

Computer-based control systems and networked control systems are hybrid systems where continuous time-driven dynamics and discrete event-driven dynamics interact. The temporal non-determinism introduced by computing and communication in the form of delays and jitter can lead to significant performance degradation. TrueTime is a MATLAB/Simulink-based simulation tool that takes a completely differen

Through the eyes of a woodpecker: Understanding habitat selection, territory quality and reproductive decisions from individual behaviour

Popular Abstract in Swedish Med hackspettsögon: att förstå habitatval, revirkvalitet och reproduktionsbeslut utifrån individers beteende Min doktorsavhandling bygger både på teoretiska modeller och på fältstudier av mindre hackspett (Dendrocopos minor). För att slippa språkliga krumbukter eller tvetydigheter kommer jag hädanefter att kalla arten "småspett" i denna sammanfattning. Fältstudierna gjIn this thesis I present some connections between foraging behaviour and reproductive success, time budget, tree species use, and habitat selection. The thesis is based upon both theoretical and empirical work. All empirical studies concern a south Swedish population of lesser spotted woodpeckers Dendrocopos minor, studied between 1990 and 1996. The foraging behaviour of the lesser spotted woodpe

Mat på arbetet dygnet runt? Arbete - Tid - Måltid

Allt fler vuxna kvinnor och män arbetar i yrken med oregelbunden arbetstid över dygnets timmar eller veckans dagar. Tillgången till mat och plats för måltiden under ”oregelbunden” dygnstid är liten. Personalmatsalar stänger tidig eftermiddag. Affärer, restauranger, försäljningsställen för take-away måltider har begränsade öppettider. Dessutom är planeringen av raster för måltider under orgelbunden

Multi-scale approach to understanding climate effects on offspring size at birth and date of birth in a reptile

Climate change is already impacting species around the world. Although most focus has been on the effect of temperature, changes in climatic variables other than temperature are also expected to drive biological change. Current models suggest that ectotherms, such as reptiles, will be strongly affected by climate change; however, data from natural populations are rare. Here, we use extensive data