Now showing items 1-10 of 10
Multimodal input fusion for companion technology
(Universität Ulm, 2018-03-12)
Today’s computer systems provide a vast variety of functionalities but at the same time lack an intelligent and natural user interface. The idea of companion technology is to complement a system with an intelligent interface ...
A debating ontology for argumentative dialogue systems
(Universität Ulm, 2018-06-01)
This thesis designs and implements an ontology which encodes the argumentative structure of natural language debates. This Debating Ontology will constitute the database for a prospective Argumentative Dialogue System, ...
Channel-SLAM: multipath assisted positioning
(Universität Ulm, 2018-10-18)
In wireless propagation transmitted signals are reflected, scattered and diffracted by objects. Especially in urban canyons or inside buildings, the signal reaching the receiving antenna consists of multiple replicas of ...
Antenna design for noncoherent massive MIMO systems
Beitrag zu einer Konferenz
(Universität Ulm, 2018-10-15)
Massive MIMO is one of the key technologies that enables an increase in capacity in multi-user MIMO systems. However, these systems suffer from high channel estimation complexity and its degradation due to pilot contamination. ...
High range and doppler resolution by application of compressed sensing using low baseband bandwidth OFDM radar
(Universität Ulm, 2018-06-05)
Multi-carrier waveforms such as orthogonal frequency-division multiplexing (OFDM) found their way into radar applications in the last few years. However, currently, typically only a fraction of the large baseband bandwidth ...
Construction and decoding of evaluation codes in hamming and rank metric
(Universität Ulm, 2018-08-30)
This dissertation considers constructions and decoders of several evaluation codes in Hamming and rank metric. Codes in Hamming metric have been studied since the 1950s and the known codes considered in this thesis have ...
Influence of channel parameters on noncoherent massive MIMO systems
Beitrag zu einer Konferenz
(Universität Ulm, 2018)
In multi-user massive MIMO uplink systems, noncoherent detection schemes offer an appealing alternative to classical coherent detection algorithms. Sorted decision-feedback differential detection (DFDD) in combination with ...
Algebraic decoding over finite and complex fields using reliability information
(Universität Ulm, 2018-01-10)
In this dissertation, new algebraic decoding algorithms for Reed–Solomon codes are developed, all of which use reliability information. The two main scenarios are Reed–Solomon codes defined over finite fields and the ...
User-adaptive statistical dialogue management using OpenDial
Abschlussarbeit (Master; Diplom)
(Universität Ulm, 2018-11-05)
In Spoken Dialogue Systems, two techniques are currently used to create an optimal dialogue policy: hand-crafted rules and statistical procedures basing on machine learning. However, both types are not sufficient in complex ...
A companion-system architecture for realizing individualized and situation-adaptive user assistance
(Universität Ulm, 2018-12-19)
We show how techniques from various research areas – most notably hierarchical planning, dialog management, and interaction management – can be employed to realize individualized and situation-adaptive user assistance. We ...