The Experts below are selected from a list of 186840 Experts worldwide ranked by ideXlab platform

Schmitt Corinna - One of the best experts on this subject based on the ideXlab platform.

  • Cybersecurity for the L-band Digital Aeronautical Communications System (LDACS)
    'Institution of Engineering and Technology (IET)', 2021
    Co-Authors: Mäurer Nils, Gräupl Thomas, Schmitt Corinna
    Abstract:

    Today's analog voice-based air-ground communication System for tactical aircraft guidance is suffering from the VHF band's increasing saturation in high-density areas. The air-ground communication infrastructure is therefore undergoing digitisation to ensure the sustainable growth of the air transportation System in the coming decades. As safety and security are strongly interrelated in aviation, strong cybersecurity is the foundation and enabler for digitalization in aviation. One of the new air-ground datalinks that shall enable this transformation is the L-band Digital Aeronautical Communication System (LDACS). It will be the primary long-range terrestrial datalink of the future IP-based aeronautical teleCommunications network. In this chapter we describe the design process, draft, and the state-of-the-art cybersecurity architecture for LDACS

  • L-band Digital Aeronautical Communications System (LDACS) draft-ietf-raw-ldacs-02
    Internet Engineering Task Force (IETF), 2020
    Co-Authors: Mäurer Nils, Gräupl Thomas, Schmitt Corinna
    Abstract:

    This document provides an overview of the architecture of the L-band Digital Aeronautical Communications System (LDACS), which provides a secure, scalable and spectrum efficient terrestrial data link for civil aviation. LDACS is a scheduled, reliable multi-application cellular broadband System with support for IPv6. LDACS shall provide a data link for IP network-based aircraft guidance. High reliability and availability for IP connectivity over LDACS are therefore essential

  • L-band Digital Aeronautical Communications System (LDACS) draft-maeurer-raw-ldacs-02
    Internet Engineering Task Force (IETF), 2020
    Co-Authors: Mäurer Nils, Gräupl Thomas, Schmitt Corinna
    Abstract:

    This document provides an overview of the architecture of the L-band Digital Aeronautical Communications System (LDACS), which provides a secure, scalable and spectrum efficient terrestrial data link for civil aviation. LDACS is a scheduled, reliable multi-application cellular broadband System with support for IPv6

  • L-band Digital Aeronautical Communications System (LDACS) draft-ietf-raw-ldacs-01
    Internet Engineering Task Force (IETF), 2020
    Co-Authors: Mäurer Nils, Gräupl Thomas, Schmitt Corinna
    Abstract:

    This document provides an overview of the architecture of the L-band Digital Aeronautical Communications System (LDACS), which provides a secure, scalable and spectrum efficient terrestrial data link for civil aviation. LDACS is a scheduled, reliable multi-application cellular broadband System with support for IPv6. LDACS shall provide a data link for IP network-based aircraft guidance. High reliability and availability for IP connectivity over LDACS are therefore essential

  • L-band Digital Aeronautical Communications System (LDACS) draft-ietf-raw-ldacs-03
    Internet Engineering Task Force (IETF), 2020
    Co-Authors: Mäurer Nils, Gräupl Thomas, Schmitt Corinna
    Abstract:

    This document provides an overview of the architecture of the L-band Digital Aeronautical Communications System (LDACS), which provides a secure, scalable and spectrum efficient terrestrial data link for civil aviation. LDACS is a scheduled, reliable multi-application cellular broadband System with support for IPv6. LDACS shall provide a data link for IP network-based aircraft guidance. High reliability and availability for IP connectivity over LDACS are therefore essential

Mäurer Nils - One of the best experts on this subject based on the ideXlab platform.

  • Flight trial demonstration of secure GBAS via the L-band digital aeronautical Communications System (LDACS)
    'Institute of Electrical and Electronics Engineers (IEEE)', 2021
    Co-Authors: Mäurer Nils, Gräupl Thomas, Bellido-manganell, Miguel A., Mielke, Daniel M., Filip-dhaubhadel Alexandra, Heirich Oliver, Gerbeth Daniel, Felux Michael, Schalk, Lukas M., Becker Dennis
    Abstract:

    The ground-based augmentation System (GBAS) is the cornerstone for enabling automated landings without the instrument landing System (ILS). Currently, GBAS is evolving to GBAS approach service type-D (GAST-D) for category III landings. This development toward GBAS GAST-D extends GBAS via the use of multiple frequencies (L1/L2 and L5) and the use of multiple global navigation satellite System constellations. GBAS requires correction data to be broadcast to aircraft, which is currently handled via the VHF data broadcast (VDB) datalink. However, VDB has several known shortcomings: 1) low throughput, 2) small area of operation, and 3) no cyber-security measures. In this article, we propose the use of the L-band digital aeronautical Communications System (LDACS) for broadcasting GBAS correction data to address these shortcomings. In flight experiments conducted in 2019, we set up an experimental GBAS installation using LDACS. Broadcast data are secured using the timed efficient stream loss-tolerant authentication (TESLA) broadcast authentication protocol. Our results indicate that cryptographically secured GBAS data via LDACS can provide GAST-C and GAST-D services with high availability if cryptographic parameters are chosen appropriately

  • Cybersecurity for the L-band Digital Aeronautical Communications System (LDACS)
    'Institution of Engineering and Technology (IET)', 2021
    Co-Authors: Mäurer Nils, Gräupl Thomas, Schmitt Corinna
    Abstract:

    Today's analog voice-based air-ground communication System for tactical aircraft guidance is suffering from the VHF band's increasing saturation in high-density areas. The air-ground communication infrastructure is therefore undergoing digitisation to ensure the sustainable growth of the air transportation System in the coming decades. As safety and security are strongly interrelated in aviation, strong cybersecurity is the foundation and enabler for digitalization in aviation. One of the new air-ground datalinks that shall enable this transformation is the L-band Digital Aeronautical Communication System (LDACS). It will be the primary long-range terrestrial datalink of the future IP-based aeronautical teleCommunications network. In this chapter we describe the design process, draft, and the state-of-the-art cybersecurity architecture for LDACS

  • L-band Digital Aeronautical Communications System (LDACS) draft-ietf-raw-ldacs-02
    Internet Engineering Task Force (IETF), 2020
    Co-Authors: Mäurer Nils, Gräupl Thomas, Schmitt Corinna
    Abstract:

    This document provides an overview of the architecture of the L-band Digital Aeronautical Communications System (LDACS), which provides a secure, scalable and spectrum efficient terrestrial data link for civil aviation. LDACS is a scheduled, reliable multi-application cellular broadband System with support for IPv6. LDACS shall provide a data link for IP network-based aircraft guidance. High reliability and availability for IP connectivity over LDACS are therefore essential

  • L-band Digital Aeronautical Communications System (LDACS) draft-maeurer-raw-ldacs-02
    Internet Engineering Task Force (IETF), 2020
    Co-Authors: Mäurer Nils, Gräupl Thomas, Schmitt Corinna
    Abstract:

    This document provides an overview of the architecture of the L-band Digital Aeronautical Communications System (LDACS), which provides a secure, scalable and spectrum efficient terrestrial data link for civil aviation. LDACS is a scheduled, reliable multi-application cellular broadband System with support for IPv6

  • L-band Digital Aeronautical Communications System (LDACS) draft-ietf-raw-ldacs-01
    Internet Engineering Task Force (IETF), 2020
    Co-Authors: Mäurer Nils, Gräupl Thomas, Schmitt Corinna
    Abstract:

    This document provides an overview of the architecture of the L-band Digital Aeronautical Communications System (LDACS), which provides a secure, scalable and spectrum efficient terrestrial data link for civil aviation. LDACS is a scheduled, reliable multi-application cellular broadband System with support for IPv6. LDACS shall provide a data link for IP network-based aircraft guidance. High reliability and availability for IP connectivity over LDACS are therefore essential

Luc Vandendorpe - One of the best experts on this subject based on the ideXlab platform.

  • multitone spread spectrum multiple access Communications System in a multipath rician fading channel
    IEEE Transactions on Vehicular Technology, 1995
    Co-Authors: Luc Vandendorpe
    Abstract:

    The paper proposes a new multiple access Communications System based on the combination of multitone transmission and direct sequence spectrum spreading (DS/SS). Multitone transmission is proposed because the associated larger symbol duration is favorable to combat the effects of multipath propagation. The multiple access capability of the System is achieved by means of DS/SS which also helps to combat the presence of several paths. On the other hand, DS/SS is also attractive to decrease the multiple access interference. The performance of this System is investigated for a multipath, slowly Rician fading and frequency selective channel, and a suboptimal receiver based on matched filters. The multiple access interference is also taken into account, A model for the computation of the bit error probability is derived for QPSK modulation of the orthogonal tones by the spread symbols. The System performance is investigated for selection diversity and maximal ratio combining (RAKE reception). Then the influence of the number of tones is investigated for given bandwidth, bit rate and transmission power. The positive effect of a multitone spread spectrum transmission is demonstrated. >

  • multitone spread spectrum multiple access Communications System in a multipath rician fading channel
    International Conference on Communications, 1994
    Co-Authors: Luc Vandendorpe
    Abstract:

    The paper proposes a new multiple access Communications System based on the combination of multitone transmission and direct sequence spread spectrum (DS/SS). The performance of this System is investigated for a multipath, slowly Rician fading and frequency selective channel, and a suboptimal receiver based on matched filters. The multiple access interference is also taken into account. The System performance is investigated for selection diversity and maximal ratio combining (Rake reception). >

Gräupl Thomas - One of the best experts on this subject based on the ideXlab platform.

  • Flight trial demonstration of secure GBAS via the L-band digital aeronautical Communications System (LDACS)
    'Institute of Electrical and Electronics Engineers (IEEE)', 2021
    Co-Authors: Mäurer Nils, Gräupl Thomas, Bellido-manganell, Miguel A., Mielke, Daniel M., Filip-dhaubhadel Alexandra, Heirich Oliver, Gerbeth Daniel, Felux Michael, Schalk, Lukas M., Becker Dennis
    Abstract:

    The ground-based augmentation System (GBAS) is the cornerstone for enabling automated landings without the instrument landing System (ILS). Currently, GBAS is evolving to GBAS approach service type-D (GAST-D) for category III landings. This development toward GBAS GAST-D extends GBAS via the use of multiple frequencies (L1/L2 and L5) and the use of multiple global navigation satellite System constellations. GBAS requires correction data to be broadcast to aircraft, which is currently handled via the VHF data broadcast (VDB) datalink. However, VDB has several known shortcomings: 1) low throughput, 2) small area of operation, and 3) no cyber-security measures. In this article, we propose the use of the L-band digital aeronautical Communications System (LDACS) for broadcasting GBAS correction data to address these shortcomings. In flight experiments conducted in 2019, we set up an experimental GBAS installation using LDACS. Broadcast data are secured using the timed efficient stream loss-tolerant authentication (TESLA) broadcast authentication protocol. Our results indicate that cryptographically secured GBAS data via LDACS can provide GAST-C and GAST-D services with high availability if cryptographic parameters are chosen appropriately

  • Cybersecurity for the L-band Digital Aeronautical Communications System (LDACS)
    'Institution of Engineering and Technology (IET)', 2021
    Co-Authors: Mäurer Nils, Gräupl Thomas, Schmitt Corinna
    Abstract:

    Today's analog voice-based air-ground communication System for tactical aircraft guidance is suffering from the VHF band's increasing saturation in high-density areas. The air-ground communication infrastructure is therefore undergoing digitisation to ensure the sustainable growth of the air transportation System in the coming decades. As safety and security are strongly interrelated in aviation, strong cybersecurity is the foundation and enabler for digitalization in aviation. One of the new air-ground datalinks that shall enable this transformation is the L-band Digital Aeronautical Communication System (LDACS). It will be the primary long-range terrestrial datalink of the future IP-based aeronautical teleCommunications network. In this chapter we describe the design process, draft, and the state-of-the-art cybersecurity architecture for LDACS

  • L-band Digital Aeronautical Communications System (LDACS) draft-ietf-raw-ldacs-02
    Internet Engineering Task Force (IETF), 2020
    Co-Authors: Mäurer Nils, Gräupl Thomas, Schmitt Corinna
    Abstract:

    This document provides an overview of the architecture of the L-band Digital Aeronautical Communications System (LDACS), which provides a secure, scalable and spectrum efficient terrestrial data link for civil aviation. LDACS is a scheduled, reliable multi-application cellular broadband System with support for IPv6. LDACS shall provide a data link for IP network-based aircraft guidance. High reliability and availability for IP connectivity over LDACS are therefore essential

  • L-band Digital Aeronautical Communications System (LDACS) draft-maeurer-raw-ldacs-02
    Internet Engineering Task Force (IETF), 2020
    Co-Authors: Mäurer Nils, Gräupl Thomas, Schmitt Corinna
    Abstract:

    This document provides an overview of the architecture of the L-band Digital Aeronautical Communications System (LDACS), which provides a secure, scalable and spectrum efficient terrestrial data link for civil aviation. LDACS is a scheduled, reliable multi-application cellular broadband System with support for IPv6

  • L-band Digital Aeronautical Communications System (LDACS) draft-ietf-raw-ldacs-01
    Internet Engineering Task Force (IETF), 2020
    Co-Authors: Mäurer Nils, Gräupl Thomas, Schmitt Corinna
    Abstract:

    This document provides an overview of the architecture of the L-band Digital Aeronautical Communications System (LDACS), which provides a secure, scalable and spectrum efficient terrestrial data link for civil aviation. LDACS is a scheduled, reliable multi-application cellular broadband System with support for IPv6. LDACS shall provide a data link for IP network-based aircraft guidance. High reliability and availability for IP connectivity over LDACS are therefore essential

Moeness G. Amin - One of the best experts on this subject based on the ideXlab platform.

  • dual function mimo radar Communications System design via sparse array optimization
    arXiv: Signal Processing, 2018
    Co-Authors: Xiangrong Wang, Aboulnasr Hassanien, Moeness G. Amin
    Abstract:

    Spectrum congestion and competition over frequency bandwidth could be alleviated by deploying dual-function radar-Communications Systems, where the radar platform presents itself as a System of opportunity to secondary communication functions. In this paper, we propose a new technique for communication information embedding into the emission of multiple-input multiple-output (MIMO) radar using sparse antenna array configurations. The phases induced by antenna displacements in a sensor array are unique, which makes array configuration feasible for symbol embedding. We also exploit the fact that in a MIMO radar System, the association of independent waveforms with the transmit antennas can change over different pulse repetition periods without impacting the radar functionality. We show that by reconfiguring sparse transmit array through antenna selection and reordering waveform-antenna paring, a data rate of megabits per second can be achieved for a moderate number of transmit antennas. To counteract practical implementation issues, we propose a regularized antenna selection based signaling scheme. The possible data rate is analyzed and the symbol/bit error rates are derived. Simulation examples are provided for performance evaluations and to demonstrate the effectiveness of proposed DFRC techniques.

  • a dual function radar Communications System using sidelobe control and waveform diversity
    IEEE Radar Conference, 2015
    Co-Authors: Aboulnasr Hassanien, Yimin D Zhang, Moeness G. Amin, Fauzia Ahmad
    Abstract:

    In this paper, we develop a new technique for dual-function radar-Communications in a transmit multi-sensor array where information embedding is achieved using sidelobe control in tandem with waveform diversity. A set of Q orthogonal waveforms is exploited to embed a sequence of Q bits during each radar pulse. All waveforms are transmitted simultaneously where one bit is embedded in each waveform. We design two transmit weight vectors to achieve two distinct transmit power distribution patterns which share the same main radar beam but have different sidelobe levels towards the communication direction. The receiver interprets the bit associated with a certain waveform as binary information based on whether that waveform is radiated over the transmit beam associated with the first or the second weight vector. The proposed technique enables information delivering to a single or multiple communication directions located outside the mainlobe of the radar. The communication message has low probability of intercept from directions other than the preassigned communication directions. Additionally, the waveform diversity enables the radar to operate in multiple-input multiple-output (MIMO) mode. The performance of the proposed technique is investigated in terms of the bit error rate (BER).