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Practical approaches to channel estimation and interference suppression for OFDM based UWB communications

Ultra-wideband (UWB) communication is a potential technique for future high-speed networks. In this paper, we investigate low complexity signal detection approaches for OFDM based UWB systems. In particular, we develop practical approaches for channel estimation and interference suppression. Computer simulation results show that these techniques can be effectively used in OFDM based UWB systems fo

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This book chapter is a feminist analysis of Richard Wagner's opera Lohengrin.

On Managing Disruption Risks in the Supply Chain - the DRISC model

Popular Abstract in Swedish BAKGRUND Fokus riktas allt mer mot försörjningskedjan och allt mindre mot det enskilda företaget i takt med att konkurrens mellan enskilda företag ersätts av konkurrens mellan försörjningskedjor. Det är emellertid endast det enskilda företaget som kan fatta beslut och vidta åtgärder, men dessa beslut och åtgärder måste idag ske utifrån ett kedjeperspektiv. Med ökat foBackground Today's modern, industrialized society is based on globalization, specialization and mass-production. It is a society dependent upon highly integrated, continuously ongoing supply chain flows. Disruptions in those flows may cause devastating negative consequences, both for the individual company, for the supply chain, and for the society at large. Purpose and objectives The purpose o

Site-controlled Ge quantum dot growth on Si by the use of electron beam pre-patterning

By growth of Si on substrates that have been pre-patterned by electron-beam induced carbon nano-growth masks, nano-holes form at the Si surface. We have grown self-assembled Ge quantum dots in these holes by ultra high vacuum chemical vapour phase deposition (UHV-CVD). We usually find four dots in each hole. By varying the amount of deposited Ge, we can obtain either four dome-shaped or four pyram

Organisationsförändring - hur, vad och varför?

Boken handlar om att fördjupa förståelsen av förändringsprocesser och problematisera den gängse bilden av förändring som något nödvändigt. Ett tekniskt perspektiv på förändring – hur man gör – är enligt oss otillräckligt. Centralt är också att förstå vad förändring betyder hos dem som engageras och vilken social dynamik – relationer och interaktioner – som präglar förändringsprocesser. Ambitionen

Biologisk Ordlista

Den biologiska ordlistan innehåller för det första en översättning av ord inom det biologiska området från engelska till svenska tillsammans med förklarande text på svenska för varje engelsk term. För det andra finns en översättning av samtliga termer från svenska till engelska. Ett antal organismer av särskild betydelse finns med i form av vetenskapliga namn. Till följd av den ökande internation

Requirements are Slipping Through the Gaps - A Case Study on Causes & Effects of Communication Gaps in Large-Scale Software Development

Communication is essential for software development as its efficiency throughout the entire project life-cycle is a key factor in developing and releasing successful software products to the market. This paper reports on findings from an explanatory case study aiming at a deeper understanding of the causes and effects of communication gaps in a large-scale industrial set up. Based on an assumption

A monotonic property of the optimal admission control to an M/M/1 queue under periodic observations with average cost criterion

We consider the problem of admission control to an M/M/1 queue under periodic observations with average cost criterion. The admission controller receives the system state information every ø :th second and can accordingly adjust the acceptance probability for customers who arrive before the next state information update instance. For a period of ø seconds, the cost is a linear function of the time

Species interactions and community structure

In this theses I have focused on how the mechanisms of species interactions affect community structure. It is well known that certain species may have a particularly strong influence on the structure of a community. What is not fully understood is how to characterize these species that have such a strong impact on community structure. In my work, I have work tried to find out what makes such speci

Om Sanning och Rätt

"It is not the eyes that fool you, it’s not the ears that can’t hear It’s the darling conceptions of your time that makes you feel this way" Detta sjunger 1600-talsastronomen Galileo Galilei i denna artikel i FRAMTIDSBOKEN, och artikeln kretsar, precis som alla sex ingående artiklar, kring konceptuella problem knutna till vår tid och ett samhälle som är mer och mer uppkopplat. Dessa dilemman är

A first encounter with faster-than-Nyquist signaling on the MIMO channel

In this paper we investigate MIMO systems where faster-than-Nyquist (FTN) signaling is used as modulation. On the AWGN channel, the main characteristic of FTN is the so called Mazo limit; it is possible to signal considerably faster than conventional without loss in minimum Euclidean distance. We show that MIMO-FTN systems inherit this property from the AWGN-FTN systems. Moreover, not only does it