You are here:
Service & Links
Current Projects A - C
Aeronautical Satellite Communications Channel Characteristics
The wireless signal propagation characteristics from a satellite based transmitter to an airborne receiver are of special interest for air traffic management as well as for passenger communications. Especially applications incorporating safety-of-life features require not only an average reliability of the transmission link but rather a high availability and have stringent requirements on the continuity-of-service.
ARIEL – Air Traffic Resilience
Civil aviation is an important asset of today’s mobile society and belongs to the critical infrastructures. Thus, the protection of civil aviation is of high importance to society. In aviation, economic pressure requests cost reductions and improved efficiency in handling aircraft. As a consequence, the infrastructure and technical systems become more and more interconnected to save costs through re-use of resources and exploitation of synergies. Besides these desired effects, the interconnection of formerly separate technical systems generates new risks. These risks are especially caused by threats from cyberspace. Main goal of the project ARIEL is to perform a holistic risk analysis and evaluation of critical infrastructures in aviation, since these might become the target of sophisticated cyberattacks to create new threats to public safety and security.
Automated Aids for safe and efficient Vessel Traffic Processes (A++Set)
Leading principle during navigation of vessels is the avoidance of collision and groundings to protect life, goods, and the maritime living space. However, a virtually unchanged number of ships’ accident has been observed during the last decade. Statistical analyses show that more than 50% of ship collisions have navigational causes, whereby 65% of whom has been induced by human factor. Main reasons in this context are insufficient situation monitoring (28%), misleading evaluation of ships’ motion (17%) as well as fatigue and overstressing of nautical staff (13%). The risk on incorrect decisions and therewith the risk on accidents can be reduced by application of automated assistance functions supporting the seafarer in situation monitoring, evaluation, and decision finding.
Laser communication through the atmosphere is impaired by turbulences in the atmosphere. This effect, known as scintillation, causes fades in the received power and outages in the laser communication for several milliseconds. Due to the high data rate in the order of 1 Gbit/s and beyond, bit error bursts of 1 Mbit and more can be observed. To compensate for this effect, DLR developed a packet level coding scheme, whose code words are longer than such error bursts and thus able to correct the long error bursts in the best possible way without the need of an interleaver. The objective of the project COLT is to design, implement and demonstrate a FPGA based packet level coder and decoder for data rates of about 1 Gbit/s.
Projects A - C
Projects D - K
Projects L - R
Projects S - Z
Copyright © 2016 German Aerospace Center (DLR). All rights reserved.