62 research outputs found
A Lower-Bound for the Error-Variance of Maximum-Likelihood Delay Estimates of Discontinuous Pulse Waveforms
A new lower bound is developed for the error variance of maximum-likelihood time-delay estimation when the received signal is a square pulse, corrupted by additive white Gaussian noise. The bound is generated by combining concepts previously developed for a special class of stochastic processes, induced by the signal model. For moderate signal to noise ratios, the new bound is significantly tighter than previously known ones
PHY Abstraction Methodsfor OFDM and NOFDM Systems, Journal of Telecommunications and Information Technology, 2009 nr 3
In the paper various PHY abstraction methods for both orthogonal and non-orthogonal systems are presented, which allow to predict the coded block error rate (BLER) across the subcarriers transmitting this FEC-coded block for any given channel realization. First the efficiency of the selected methods is investigated and proved by the means of computer simulations carried out in orthogonal muticarrier scenario. Presented results are followed by the generalization and theoretical extension of these methods for non-orthogonal systems
D5.2 - Evaluation of Selected Measurement-based Techniques
Deliverable D5.2 del projecte FARAMIRPreprin
D6.2 - Prototype description and field trial results
Deliverable D6.2 del projecte FARAMIRPostprint (published version
D13.2 Techniques and performance analysis on energy- and bandwidth-efficient communications and networking
Deliverable D13.2 del projecte europeu NEWCOM#The report presents the status of the research work of the
various Joint Research Activities (JRA) in WP1.3 and the results
that were developed up to the second year of the project. For
each activity there is a description, an illustration of the
adherence to and relevance with the identified fundamental
open issues, a short presentation of the main results, and a
roadmap for the future joint research. In the Annex, for each
JRA, the main technical details on specific scientific activities
are described in detail.Peer ReviewedPostprint (published version
D13.3 Overall assessment of selected techniques on energy- and bandwidth-efficient communications
Deliverable D13.3 del projecte europeu NEWCOM#The report presents the outcome of the Joint Research Activities (JRA) of WP1.3 in the last year of the Newcom# project. The activities focus on the investigation of bandwidth and energy efficient techniques for current and emerging wireless systems. The JRAs are categorized in three Tasks: (i) the first deals with techniques for power efficiency and minimization at the transceiver and network level; (ii) the second deals with the handling of interference by appropriate low interference transmission techniques; (iii) the third is concentrated on Radio Resource Management (RRM) and Interference Management (IM) in selected scenarios, including HetNets and multi-tier networks.Peer ReviewedPostprint (published version
D13.1 Fundamental issues on energy- and bandwidth-efficient communications and networking
Deliverable D13.1 del projecte europeu NEWCOM#The report presents the current status in the research area of energy- and bandwidth-efficient communications and networking and highlights the fundamental issues still open for further investigation. Furthermore, the report presents the Joint Research Activities (JRAs) which will be performed within WP1.3. For each activity there is the description, the identification of the adherence with the identified fundamental open issues, a presentation of the initial results, and a roadmap for the planned joint research work in each topic.Preprin
An Integrated Physical/link-access Layer Model Of Packet Radio Architectures
The goal of this effort is to devise and analyze an integrated Physical/ Link-Access Layer Model of packet Radio Architectures, with application to the PATH/IVHS (Intelligent Vehicle Highway Systems) communication sub- system design between vehicles and infrastructure, as well as between vehicles on the move. The present report contributes to a generic conceptual model for system evaluation which can be used for quantification of the interaction between network layers. The research tasks that have been performed for achieving the project objectives include collection of data requirements for Advanced Traffic Management and Information Systems (ATMIS), Advanced Vehicle Control Systems (AVCS) as well as for an integrated ATMIS/AVCS system, definition of communication system requirements (user's integrated data traffic, attributes of the integrated system), analysis and performance evaluation of multiple access schemes for vehicle-to-roadway and vehicle-to-vehicle communications, identification of multiple access protocols that can accommodate the communication needs of the integrated ATMIS/AVCS data traffic, and a complete performance analysis of an asynchronous multi-cell Direct-Sequence Code Division Multiple-Access (DS/CDMA) microcellular system for both uplink (vehicle to base station) and downlink (base station to vehicle) communications
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