The core competences of the Fraunhofer Institute for Communications Technology, Heinrich-Hertz-Institut HHI encompass photonic telecommunica-tion networks, broadband mobile systems and electronic image technology for multimedia appli-cations.
A key focus lies in photonic networks, from high-capacity flexible long-distance networks to broad-band in-house networks. This is closely linked with the development and study of extremely high-rate, high-capacity optical transmission systems based on wavelength and optical time division multiplex-ing (WDM and OTDM). The institute´s research and development work on photonic components fo-cuses on lasers for the next Ethernet generation and WDM systems, including wavelength convert-ers, pulse sources and optical demultiplexers for OTDM systems, self-pulsing lasers for optical signal regeneration at very high data rates, and broad-band receivers.
In the field of electronic image technology for multimedia applications, the institute´s R&D work is aimed at the creation of a basic infrastructure for multimedia services using both photonics-based broadband networks and 3G mobile communica-tion networks.
Its main areas of work lie in video and audio en-coding (signal processing techniques and their implementation in VLSI circuits) and video and audio transmission (video compression techniques and robust transmission protocols for mobile channels), 2D-and 3D image signal processing, image reproduction in virtual environments, stereo-scopic displays, and human-machine interfaces (3D desktop computer and 2D/3D user interaction).
R&D activities in the field of broadband mobile systems concentrate on intelligent antennas oper-ating in the 2-60-GHz range, including space-time signal processing, design of algorithms and their implementation in multiple-input/multiple-output systems and CDMA and OFDM systems.
The Fraunhofer HHI has a staff of 268, working on R&D contracts in over 10,000 m2 of office space, laboratories and clean-room facilities.
Fraunhofer-Institut Nachrichtentechnik, Heinrich-Hertz-Institut
Further information: http://www.hhi.fraunhofer.de