Projekte - Abgeschlossen

J-Ortigia



The key objectives of the J-ORTIGIA project are to:

  • Evolve the receiver setup developed in the ORTIGIA (19849/06/NL/US) framework in terms of performance, RF tuning, and alignment with the DVB-SH standard;
  • Develop and/or procure measurement equipments essential to improving the accuracy of results coming out from on-field trials;
  • Use the developed technologies for testing reception in realistic scenarios, both for handheld and vehicular use cases;
  • Deploy a representative Complementary Ground Component capable to host both measurement sessions and pilot projects with alpha-users;
  • Perform on-field trials in Japan using the ETS-VIII satellite and a receiver representative of the handheld use case.

To achieve the key milestone of the first part of the project, the J-ORTIGIA project will make use of the S-band payload of the ETS-VIII Japanese satellite, and of associated uplink facilities provided by NICT (National Institute of Information and Communication Technology). The ETS-VIII satellite can offer about 60dBW EIRP and this allows the verification of usage scenarios considered as typical for Mobile Broadcasting System via satellite.
 
The purpose of the experiments is to focus on the test and validation of the reception of satellite signals with terminal antenna typical for handheld devices.

In order to simplify the achievement of all targets the project has been split in three Phases:

  • Phase-1: a series of preliminary analysis are foreseen in the network planning, the terrestrial repeater procurement and the hardware equipment (modulator and demodulator) updating;
  • Phase-2: integration of the handheld mock-up and vehicular terminals; execution of a validation session before moving all equipments to Japan; execution of Japanese trials with ETS-VIII satellite;
  • Phase-3: this phase is entirely dedicated to DVB-SH equipment. A series of trials are scheduled within the Pilot Terrestrial Network deployed with the support of W2A that comes in the final part of the project.

DLR tasks include:

  • Analysis and development of advanced UL-FEC approaches, aiming to achieve near-Shannon limit performance with limited decoding complexity. Among them, DLR developed a novel concept for UL-FEC coding which is based on maximum-likelihood decoding of LDPC codes.
  • Implementation of the most promising advanced UL-FEC approach, showing the feasibility (in terms of complexity) of software-based advanced UL-FEC decoders. The almost capacity-achieving performance has been demonstrated as well.
  • Integration of the UL-FEC decoder into the protocol stack, and later on in the live setup. This implies the development of encapsulators/decapsulators and of an MPE-iFEC-compliant signalling, as well as of the interfaces towards demodulators/modulators and to the source and the video player.
  • Advanced Trials in Japan, with full support during the measurement campaign and with post-processing and analysis of the field results.
  • In Phases 2 and 3, the UL-FEC concept has further evolved, going towards an integrated handheld live implementation.

 

Partners:

Eutelsat, France
SES ASTRA, Luxembourg
Abertis Telecom S. A., Spain
Fraunhofer Institut, Germany 
AWE Communications, Germany
MBI group, Italien
UBS (Unique Broadband Systems Ltd., Canada


Contact
Dr. Gianluigi Liva
German Aerospace Center

Institute of Communications and Navigation
, Satellite Networks
Tel: +49 8153 28-1881

Fax: +49 8153 28-2844

E-Mail: Gianluigi.Liva@dlr.de
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