Mobile Radio Transmission Group

The Mobile Radio Transmission Group covers terrestrial mobile radio communication systems. Research work focuses on the physical as well as the MAC layer. A further topic of the Group is the integration of Communication and Navigation, i.e., positioning using terrestrial mobile radio systems and exploitation of position information for communications.

Research Topics

  • Multicarrier systems (OFDM)
  • Integration of communications and navigation
  • Positioning in mobile radio communication systems
  • Synchronization
  • Channel modelling for mobile radio positioning

Current Projects and Activities

Wireless Hybrid Enhanced Mobile Radio Estimators
(WHERE, EU FP7 ICT Project)
The main objective of WHERE is to combine wireless communications and navigation for the benefit of future mobile radio systems. The impact will be manifold, such as real time localization knowledge in B3G/4G systems which increase the cellular capacity. GPS as well as the upcoming European Satellite Navigation System Galileo will be supplemented with techniques that improve accuracy and availability of indoor navigation and location based service coverage.

Galileo Ready Advanced Mass MArket Receiver
(GRAMMAR, EU FP7, Galileo GSA)
GRAMMAR represents a highly innovative approach to developing a prototype GNSS receiver, targeted at mass market applications, with the widest potential exploitation.

Key Issues
Significant effort has been devoted in FP6 to R&D for mass market receiver technologies. The GRAMMAR project will consider and analyze these FP6 achievements and expand and explore on new features for special mass market segments.

The activities will be based on the inputs from the prototyping results of the GREAT project (of which GRAMMAR is a direct continuation) and focus on the development of:

Multiple-frequency low power single chip GNSS radio front end designed to address the challenge for a plurality of advanced mass-market applications.
A baseband prototype implementing advanced features not currently seen in mass market receivers.
Prototyping advanced algorithms in FPGA to determine their suitability for mass market receivers.
Simulations addressing algorithms and techniques for receivers beyond the current state-of-the-art such as complexity reduced multipath mitigation, and non-line-of-sight detection and mitigation.
Studying the suitability of inexpensive sensors and/or assistance from existing wireless networks for improved indoor and urban position solution robustness and availability.

Galileo Advanced Applications:
Research work in this project covers the investigation and development of positioning algorithms in terrestrial mobile communications systems.

Wireless World Research Forum (WWRF):
Identification of visions and strategies on future research directions in the wireless field with the focus on the definition of a new broadband air interface.

Finished Projects

(EU FP6 project)
Research and development of novel techniques for broadcast transmitter networks that minimise the complexity and power consumption of end user equipment. In this project DLR has been on transmit antenna diversity technologies. Techniques investigated in PLUTO improve reception in areas of poor coverage such as for mobile reception, indoors and sparsely populated or obscured locations.

(EU FP6 project)
Development of a ubiquitous radio system concept covering the full range of scenarios from short range to wide area networks providing significant improvements compared to current systems in terms of performance, efficiency and coverage flexibility.

(EU GJU project)
Development of advanced technologies required for the next generation of positioning receivers - to be used with the new Galileo Global Navigation Satellite System.

(COST project 289)
Increase the capacity of communication systems within a specified transmission bandwidth with minimum available transmitter power, bearing in mind the cost effectiveness and the practical implementability of the system.

(EU FP6 project)
Strengthening, development and integration of research in the field of mobile and wireless systems beyond 3G.

4MORE (EU FP6 project):
Development and prototyping of a low power system on chip solution for a multi-antenna MC-CDMA mobile communication system based on joint optimisation of layer 1 and layer 2 functions.

Broadband Air Interface for 4G Mobile Radio Systems (Research Cooperation with DoCoMo Eurolabs):
Design and analysis of an OFDM based air interface for future broadband mobile radio systems with data rates up to 100 Mbit/s. The system design has its focus on the physical layer. The underlying multiple access scheme is an adaptive MC-CDMA realization.

Multimedia Car Platform (MCP, EU IST project):
The purpose of the MCP is to offer new communication, navigation and entertainment services for car drivers and passengers.

Multimedia Communications on Integrated Networks and Terminals (MINT, BMBF project):
Design and realization of service and system concepts as well as transmission schemes particularly with regard to wireless inhouse networks.

Dr.-Ing. Armin Dammann
German Aerospace Center (DLR)
Institute of Communications and Navigation
Tel.: +49 8153 28-2871
Fax: +49 8153 28-1871


Dr.-Ing. Armin Dammann
German Aerospace Center

Institute of Communications and Navigation
, Communications Systems
Tel: +49 8153 28-2871

Fax: +49 8153 28-1871

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