H
Hermann Bischl
Researcher at German Aerospace Center
Publications - 39
Citations - 439
Hermann Bischl is an academic researcher from German Aerospace Center. The author has contributed to research in topics: Communications satellite & Geostationary orbit. The author has an hindex of 10, co-authored 38 publications receiving 419 citations.
Papers
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Proceedings ArticleDOI
Channel characterisation for spread spectrum satellite communications
TL;DR: A wideband channel model for land mobile satellite (LMS) services is presented which characterises the time-varying transmission channel between a satellite and a mobile user terminal.
Journal ArticleDOI
Packet error rate in the non-interleaved Rayleigh channel
Hermann Bischl,Erich Lutz +1 more
TL;DR: Two analytical methods for determining the packet error rate in the non-interleaved Rayleigh fading channel are presented and it is shown that the convolutional code with intra packet interleaving is least sensitive to slow fading.
Journal ArticleDOI
Adaptive coding and modulation for satellite broadband networks: From theory to practice
Hermann Bischl,Hartmut Brandt,Tomaso de Cola,Riccardo De Gaudenzi,Ernst Eberlein,Nicolas Girault,Eric Alberty,Stefan Lipp,Rita Rinaldo,Bjarne Rislow,John Arthur Skard,Jacky Tousch,Gerald Ulbricht +12 more
TL;DR: It is demonstrated that few ACM configurations are able to efficiently cope with a typical Ka-band multi-beam satellite system with negligible capacity loss, and the exploitation of ACM thresholds with hysteresis represents the most reliable way to adapt the physical layer configuration to the spatial and time variability of the channel conditions while avoiding too many physical layer configurations changes.
Proceedings ArticleDOI
An adaptive MAC layer protocol for ATM-based LEO satellite networks
Marc Emmelmann,Hermann Bischl +1 more
TL;DR: An adaptive MAC and FEC scheme which switches on the fly during a connection between several FEC and modulation modes to guarantee a maximum ATM cell error rate of 10/sup -6/.
Proceedings ArticleDOI
Optical high-capacity satellite downlinks via high-altitude platform relays
Markus Knapek,Joachim Horwath,Florian Moll,Bernhard Epple,Nicolas Courville,Hermann Bischl,Dirk Giggenbach +6 more
TL;DR: In this paper, the authors discuss the capabilities of HAP and GEO relay stations to increase the downlink capacities of LEO satellites by using a stratospheric high altitude platform (HAP) to forward the optical communication beam over the last 20km through the atmosphere to the ground station.