| 1. |
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| 2. |
- Aronsson, Daniel, et al.
(författare)
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EU FP6 IST-4-027756 WINNER II, D2.3.3 Link level procedures for the WINNER System, Nov 2007
- 2007
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- In this deliverable, channel estimation algorithms, pilot design, measurement and signalling concepts, link and network synchronisation techniques, and the effects and remedies for RF impairments are described and evaluated for effective application in all WINNER modes, multiple access techniquesand deployment scenarios, for SISO and MIMO systems.
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| 3. |
- Auer, Gunther, et al.
(författare)
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CELTIC CP5-026 WINNER+, D1.5 Intermediate Report on System Aspect of Advanced RRM
- 2009
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- The deliverable describes the second set of best innovations proposed in the framework of the WP1 on system aspect of advanced Radio Resource Management (RRM) approved by the System Group. These concepts consist of promising innovative techniques and include an initial evaluation of the performance and benefits as far as already available. A brief description of each technique together with the relevant state of the art is provided.Moreover, first considerations about the requirements on the system, especially regarding measurements, signalling, architecture and protocols are described. The last set of innovations will be ready for the final deliverable of proof of concept evaluation.
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| 4. |
- Auer, Gunther, et al.
(författare)
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EU FP6 IST-4-027756 WINNER II, D6.13.14 WINNER II System Concept Description, Dec 2007
- 2007
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- This document contains a top-down view of the WINNER system with respect to logical node architecture, protocol architecture and cooperation architecture to give a basic understanding of the WINNER concept and as a complement to performance evaluations and design examples. The document also describes some of the important cross-layer optimizations that have been made. In addition to describing the concept, several example reference designs have been studied and are described.
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| 5. |
- Auer, Gunther, et al.
(författare)
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Pilot Aided Channel Estimation for OFDM : A Separated Approach for Smoothing and Interpolation
- 2005
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Ingår i: Proceedings of the 40th IEEE International Conference on Commununications (ICC). - 0780389387 ; , s. 2173-2178
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Konferensbidrag (refereegranskat)abstract
- In this paper pilot aided channel estimation (PACE) for OFDM is addressed. For PACE equidistantly spaced pilot symbols allow to reconstruct the channel response by means of interpolation. The optimum minimum mean squared error (MMSE) estimator performs smoothing and interpolation jointly. To reduce the complexity of the optimum MMSE estimator, we propose to separate the smoothing and interpolation tasks. The separated smoothing and interpolation estimator (SINE) consistsof a MMSE based smoother which only operates at the received pilot symbols, and an interpolator which is independent of the channel statistics. We show that the separated approach gets close to the optimum MMSE, while the complexity is grossly reduced. However, at high SNR an error floor is observed, which is caused by edge effects, i.e. subcarriers near the beginning and end of the band suffer from an increased interpolation error.
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| 6. |
- Metzger, F. Luise, et al.
(författare)
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Shifted dynamic interactions between subcortical nuclei and inferior frontal gyri during response preparation in persistent developmental stuttering
- 2018
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Ingår i: Brain Structure and Function. - : Springer Science and Business Media LLC. - 1863-2653 .- 1863-2661. ; 223:1, s. 165-182
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Tidskriftsartikel (refereegranskat)abstract
- Persistent developmental stuttering is associated with basal ganglia dysfunction or dopamine dysregulation. Here, we studied whole-brain functional connectivity to test how basal ganglia structures coordinate and reorganize sensorimotor brain networks in stuttering. To this end, adults who stutter and fluent speakers (control participants) performed a response anticipation paradigm in the MRI scanner. The preparation of a manual Go/No-Go response reliably produced activity in the basal ganglia and thalamus and particularly in the substantia nigra. Strikingly, in adults who stutter, substantia nigra activity correlated positively with stuttering severity. Furthermore, functional connectivity analyses yielded altered task-related network formations in adults who stutter compared to fluent speakers. Specifically, in adults who stutter, the globus pallidus and the thalamus showed increased network synchronization with the inferior frontal gyrus. This implies dynamic shifts in the response preparation-related network organization through the basal ganglia in the context of a non-speech motor task in stuttering. Here we discuss current findings in the traditional framework of how D1 and D2 receptor activity shapes focused movement selection, thereby suggesting a disproportional involvement of the direct and the indirect pathway in stuttering.
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| 7. |
- Osseiran, Afif, et al.
(författare)
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CELTIC CP5-026 WINNER+, D2.2 Enabling Techniques for LTE-A and beyond
- 2010
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- This deliverable summarizes the most promising enabling techniques for LTE-A and beyond in seven major areas. These areas are: Carrier Aggregation, Coordinated Multipoint Systems, Femtocells, Network Coding, MIMO, Quality of Service, Resource allocation, and Relaying. A description of the most relevant scenarios where the techniques can be used is given. Further the end-2-end performance approach is presented. Finally future research directions of enabling techniques beyond LTE-A are given.
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