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Simon Gortzen - IEEE Xplore Author Profile
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Simon Gortzen

Also published under: Simon Görtzen

Publications
6
Citations
47
Publications by Year
20102014
Co-Authors:
Show All Co-Authors (7)
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Simon Gortzen

Also published under: Simon Görtzen

Affiliation

RWTH Aachen University
Institute for Theoretical Information Technology
Aachen, Germany

Publication Topics

Biography

Simon Görtzen received his Diploma degree in mathematics with a minor in computer science from RWTH Aachen University, Germany, in 2008. He is a Ph.D. student at the UMIC Research Centre at RWTH Aachen University, pursuing a degree in electrical engineering and information technology. His research interests are OFDMA systems and resource allocation problems, convex optimization techniques and algorithm design.(Based on document published on 17 June 2014).
Publications
6
Citations
47
Publications by Year
20102014
Co-Authors:
Show All Co-Authors (7)
Author's Published Works

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Non-Asymptotic Bounds on the Performance of Dual Methods for Resource Allocation Problems

Simon Gortzen;Anke Schmeink

IEEE Transactions on Wireless Communications
Year: 2014 | Volume: 13, Issue: 6 | Journal Article |
In this paper, dual methods based on Lagrangian relaxation for multiuser multicarrier resource allocation problems are analyzed. Their application to non-convex resource allocation problems is based on results guaranteeing asymptotic optimality as the number of subcarriers tends to infinity. This work analyzes the workings and performance of dual methods for resource allocation problems with conca...Show More

Non-Asymptotic Bounds on the Performance of Dual Methods for Resource Allocation Problems

Simon Gortzen;Anke Schmeink

Year: 2014 | Volume: 13, Issue: 6 | Journal Article |

Analytical Model of Proportional Fair Scheduling in Interference-Limited OFDMA/LTE Networks

Donald Parruca;Marius Grysla;Simon Gortzen;James Gross

2013 IEEE 78th Vehicular Technology Conference (VTC Fall)
Year: 2013 | Conference Paper |
Cited by: Papers (23)
Various system tasks like interference coordination, handover decisions, admission control etc. in upcoming cellular networks require precise mid-term (spanning over a few seconds) performance models. Due to channel-dependent scheduling at the base station, these performance models are not simple to obtain. Furthermore, upcoming cellular systems will be interference-limited, hence, the way interfe...Show More

Analytical Model of Proportional Fair Scheduling in Interference-Limited OFDMA/LTE Networks

Donald Parruca;Marius Grysla;Simon Gortzen;James Gross

Year: 2013 | Conference Paper |

Energy-efficient multi-hop transmission for machine-to-machine communications

Christian Dombrowski;Neda Petreska;Simon Görtzen;Anke Schmeink;James Gross

2013 11th International Symposium and Workshops on Modeling and Optimization in Mobile, Ad Hoc and Wireless Networks (WiOpt)
Year: 2013 | Conference Paper |
Cited by: Papers (1)
Emerging machine-to-machine communication scenarios are envisioned to deal with more stringent quality-of-service demands. This relates mainly to outage and latency requirements, which are for example for safety-critical messages quite different than for traditional applications. On the other hand, it is widely accepted that machine-to-machine communication systems need to be energy-efficient beca...Show More

Energy-efficient multi-hop transmission for machine-to-machine communications

Christian Dombrowski;Neda Petreska;Simon Görtzen;Anke Schmeink;James Gross

Year: 2013 | Conference Paper |

Optimality of Dual Methods for Discrete Multiuser Multicarrier Resource Allocation Problems

Simon Gortzen;Anke Schmeink

IEEE Transactions on Wireless Communications
Year: 2012 | Volume: 11, Issue: 10 | Journal Article |
Cited by: Papers (22)
Dual methods based on Lagrangian relaxation are the state of the art to solve multiuser multicarrier resource allocation problems. This applies to concave utility functions as well as to practical systems employing adaptive modulation, in which users' data rates can be described by step functions. We show that this discrete resource allocation problem can be formulated as an integer linear program...Show More

Optimality of Dual Methods for Discrete Multiuser Multicarrier Resource Allocation Problems

Simon Gortzen;Anke Schmeink

Year: 2012 | Volume: 11, Issue: 10 | Journal Article |

Hierarchical generalized Cantor set modulation

Simon Görtzen;Lars Schiefler;Anke Schmeink

2011 8th International Symposium on Wireless Communication Systems
Year: 2011 | Conference Paper |
Cited by: Papers (1)
In this paper, we show that arbitrary hierarchical pulse amplitude modulation (PAM) schemes can be fully described by generalized Cantor sets. Generalized Cantor sets are modified versions of the Cantor ternary set, a famous mathematical construct known for its set-theoretical properties. The fractal nature of generalized Cantor sets allow for a natural reinterpretation as a modulation scheme. The...Show More

Hierarchical generalized Cantor set modulation

Simon Görtzen;Lars Schiefler;Anke Schmeink

Year: 2011 | Conference Paper |

A theoretical framework for capacity-achieving multi-user waterfilling in OFDMA

Simon Görtzen;Anke Schmeink

2010 International Symposium On Information Theory & Its Applications
Year: 2010 | Conference Paper |
This paper introduces a theoretical framework for subcarrier and power allocation algorithms in rate-adaptive OFDMA systems. The focal point is locating “capacity-achieving” waterlevels for a given allocation in order to minimize the distance to the boundary of the capacity region. We prove that it is possible to restrict the choice of waterlevels to an optimality polyhedron. This paper introduces...Show More

A theoretical framework for capacity-achieving multi-user waterfilling in OFDMA

Simon Görtzen;Anke Schmeink

Year: 2010 | Conference Paper |

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