Interference-Aware Location Estimation in Cellular OFDM Communications Systems (2009)
Mensing, Christian, Sand, Stephan, Dammann, Armin, Utschick, Wolfgang
Hybrid Data Fusion and Cooperative Schemes for Wireless Positioning (2008)
Sand, Stephan, Mensing, Christian, Ma, Yi, Tafazolli, Rahim, Yin, Xuefeng, Figueiras, João, ...
Abstract—The Wireless Hybrid Enhanced Mobile Radio Estimators (WHERE) consortium researches radio positioning techniques to improve various aspects of communications systems. In order to provide...
High Resolution Channel Estimation Using The Expectation Maximization Algorithms (2008)
Qaise, Omar, Sand, Stephan, Schneider, Martin
One of the most important tasks of satellite navigation systems consists of propagation delay estimation and timing tracking. Related problems appear when considering wideband code division multiple...
Cyclic Delay Diversity - A Simple, Flexible and Effective Multi-Antenna Technology for OFDM (2008)
Dammann, Armin, Plass, Simon, Sand, Stephan
We recall the principles of Cyclic Delay Diversity (CDD) and discuss the properties and impact of this transmit antenna diversity technology. Different applications motivate variations of the CDD...
Benefits, Variants and Applications of Cyclic Delay Diversity (2008)
Dammann, Armin, Plass, Simon, Sand, Stephan, Raulefs, Ronald
Cyclic delay diversity (CDDx) is a simple multiple antenna technologyxs which provides additional diversity in Rayleigh fading channels, and therefore, improves the system performance. We recall the...
GREAT – Galileo Receivers for Mass Market (2008)
Sand, Stephan, Mensing, Christian, Groh, Ingmar, Hurskainen, Heikki, Nurmi, Jari, Detratti, Marco, ...
The Galileo Receivers for Mass Market (GREAT) project has achieved major blocks of demonstrable intellectual property including advanced algorithms for hybrid data fusion, multipath mitigation, and...
Adaptive Bit Loading for BICM-OFDM withSquare Lattice QAM Constellations (2008)
Sand, Stephan, Mensing, Christian, Mutti, Carlo, Wittneben, Armin
Mensing, Christian, Sand, Stephan
Objective of this paper is to analyze positioning performance in critical scenarios for global navigation satellite systems (GNSSs). For instance, in urban canyons GNSSs can fail due to too many...
Adaptive Bit Loading for BICM-OFDM with Square Lattice QAM Constellations (2008)
Sand, Stephan, Mensing, Christian, Mutti, Carlo, Wittneben, Armin
Cellular Systems for Positioning: Capabilities and Challenges (2008)
Mensing, Christian, Sand, Stephan, Dammann, Armin
The objective of this paper is to analyze positioning performance utilizing cellular mobile radio systems. In situations where classical satellite based global navigation satellite systems (GNSSs)...
Adaptive Bit Loading and Transmit Diversity for Iterative OFDM Receivers (2008)
Sand, Stephan, Mensing, Christian, Mutti, Carlo, Wittneben, Armin
Adaptive Bit Loading for OFDM Systems with Imperfect Channel State Information (2007)
Sand, Stephan, Dammann, Armin, Mutti, Carlo
In this paper, we consider a transmission system employing orthogonal frequency division multiplexing~(OFDM) with bit-interleaved coded modulation and imperfect channel state information at both...
High Spectral Efficient and Flexible Next Generation Mobile Communications (2007)
Plass, Simon, Sand, Stephan, Sternad, Mikael, Svensson, Arne
Communications and GNSS based Navigation: A Comparison of Current and Future Trends (2007)
Sand, Stephan, Mensing, Christian, Ancha, Sireesha, Bell, Graham
Positioning in Wireless Communication Systems: Introduction and Overview (2007)
Mensing, Christian, Sand, Stephan, Dammann, Armin
This paper gives an overview on communication system based and global navigation satellite system (GNSS) based navigation and summarizes the contributions of a special session on "Positioning in...
Performance Assessment of Hybrid Data Fusion and Tracking Algorithms (2007)
Sand, Stephan, Mensing, Christian, Laaraiedh, Mohamed, Uguen, Bernard, Denis, Benoît, Mayrargue, Sylvie, ...
This paper presents an overview on the performance of hybrid data fusion and tracking algorithms evaluated in the WHERE consortium. The focus is on small scale indoor scenarios with ultra wideband...
Performance Assessment of Hybrid Data Fusion and Tracking Algorithms (2007)
Sand, Stephan, Mensing, Christian, Laaraiedh, Mohamed, Uguen, Bernard, Denis, Benoît, Mayrargue, Sylvie, ...
This paper presents an overview on the performance of hybrid data fusion and tracking algorithms evaluated in the WHERE consortium. The focus is on small scale indoor scenarios with ultra wideband...
Adaptive Bit Loading and Transmit Diversity for Iterative OFDM Receivers (2007)
Sand, Stephan, Mensing, Christian, Mutti, Carlo, Witteneben, Armin
Adaptive Bit Loading and Transmit Diversity for Iterative OFDM Receivers (2007)
Sand, Stephan, Mensing, Christian, Mutti, Carlo, Wittneben, Armin
APPARATUS AND METHOD FOR ITERATIVELY ESTIMATING A CHANNEL TRANSFER FUNCTION (2007)
Auer, Gunther, Sand, Stephan, Raulefs, Ronald
An apparatus for iteratively estimating a channel transfer function of a communication channel from a received signal being a receivable version of a transmit signal, the transmit signal being...
On Iterative Detection, Demodulation and Decoding for OFDM-CDM (2006)
Dammann, Armin, Ayaz, Serkan, Sand, Stephan, Raulefs, Ronald
In this paper, we address iterative receiver processing for OFDM code division multiplexing (OFDM-CDM). The receiver algorithm we focus on is soft parallel interference cancellation in combination...
Sand, Stephan, Portier, Fabrice, Hélard, Jean-François
Abstract
Channel Estimation for orthogonal STBC MC-CDMA systems over realistic MIMO channels (2006)
Sand, Stephan, Portier, Fabrice, Hélard, Jean-François
This paper investigates a downlink multiple-input multiple-output (MIMO) multi-carrier code division multiple access (MC-CDMA) system with pilot aided channel estimation (PACE) and iterative channel...
Portier, Fabrice, Sand, Stephan, Hélard, Jean-François
This paper considers a downlink multiple-input multiple-output (MIMO) multi-carrier code division multiple access (MC-CDMA) system with pilot aided channel estimation (PACE) and iterative channel...
Portier, Fabrice, Sand, Stephan, Hélard, Jean-François
This paper considers a downlink multiple-input multiple-output (MIMO) multi-carrier code division multiple access (MC-CDMA) system with pilot aided channel estimation (PACE) and iterative channel...
Sand, Stephan, Portier, Fabrice, Hélard, Jean-François
Abstract
Channel Estimation for orthogonal STBC MC-CDMA systems over realistic MIMO channels (2006)
Sand, Stephan, Portier, Fabrice, Hélard, Jean-François
This paper investigates a downlink multiple-input multiple-output (MIMO) multi-carrier code division multiple access (MC-CDMA) system with pilot aided channel estimation (PACE) and iterative channel...
Portier, Fabrice, Sand, Stephan, Hélard, Jean-François
This paper considers a downlink multiple-input multiple-output (MIMO) multi-carrier code division multiple access (MC-CDMA) system with pilot aided channel estimation (PACE) and iterative channel...
Channel Estimation for orthogonal STBC MC-CDMA systems over realistic MIMO channels (2006)
Sand, Stephan, Portier, Fabrice, Hélard, Jean-François
This paper investigates a downlink multiple-input multiple-output (MIMO) multi-carrier code division multiple access (MC-CDMA) system with pilot aided channel estimation (PACE) and iterative channel...
Channel Estimation for Orthogonal STBC MC-CDMA Systems over Realistic MIMO Channels (2006)
Sand, Stephan, Portier, Fabrice, Hélard, Jean-François
This paper investigates a downlink multiple-input multiple-output (MIMO) multi-carrier code division multiple access (MC-CDMA) system with pilot aided channel estimation (PACE) and iterative channel...
Portier, Fabrice, Sand, Stephan, Hélard, Jean-François
This paper considers a downlink multiple-input multiple-output (MIMO) multi-carrier code division multiple access (MC-CDMA) system with pilot aided channel estimation (PACE) and iterative channel...
Channel Estimation for orthogonal STBC MC-CDMA systems over realistic MIMO channels (2006)
Sand, Stephan, Portier, Fabrice, Hélard, Jean-François
This paper investigates a downlink multiple-input multiple-output (MIMO) multi-carrier code division multiple access (MC-CDMA) system with pilot aided channel estimation (PACE) and iterative channel...
Survey on EU Research Activities in Terrestrial Wireless and Mobile Satellite Communications (2005)
Dammann, Armin, Del Sorbo, Filomena, Plass, Simon, Raulefs, Ronald, Robertson, Patrick, Rosati, Laura, ...
Technologien für Luftschnittstellen in 4G Mobilfunksystemen (2005)
Dammann, Armin, Raulefs, Ronald, Sand, Stephan, Ayaz, Serkan
Rotated Walsh-Hadamard Spreading with Robust Channel Estimation for a Coded MC-CDMA System (2004)
Ronald Raulefs, Armin Dammann, Stephan Sand, Stefan Kaiser, Gunther Auer
We investigate rotated Walsh-Hadamard spreading matrices for a broadband MC-CDMA system with robust channel estimation in the synchronous downlink. The similarities between rotated spreading and...