Physical layer specification of the L-band Digital Aeronautical Communications System (L-DACS1)

Brandes, Sinja; Epple, Ulrich; Gligorevic, Snjezana; Schnell, Michael; Haindl, Bernhard; Sajatovic, M.

doi:10.1109/icnsurv.2009.5172853

Cited by 47 publications

(38 citation statements)

References 4 publications

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“…in [8] or [9]. However, these investigations are based on the assumption of perfect synchronization.…”

Section: Receiver Designmentioning

confidence: 96%

“…Due to the high interference power and small frequency offset between L-DACS1 and other L-band systems, interference strongly impairs the L-DACS1 Rx signal. Techniques for mitigating the impact of interference and a robust algorithm for channel estimation have been addressed in [8] and [9], respectively. In this paper, the synchronization in time and frequency between the L-DACS1 Tx and Rx is investigated and a synchronization algorithm which is robust towards interference is proposed.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Receiver optimization for L-DACS1

Epple

Brandes

Gligorevic

et al. 2009

2009 IEEE/AIAA 28th Digital Avionics Systems Conference

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L-DACS1 is the broadband candidate technology for the future L-band Digital Aeronautical Communications System (L-DACS). The flexible design of L-DACS1 allows the deployment as an inlay system in the spectral gaps between two adjacent channels used by the Distance Measuring Equipment (DME) as well as the non-inlay deployment in unused parts of the L-band. In this paper, the synchronization procedure in L-DACS1, when deploying it as inlay system is presented. It will be investigated how the synchronization suffers from interference in the L-band. In addition, interference mitigation techniques are briefly described and their influence onto the synchronization is examined. Finally, the performance of an appropriate combination of interference mitigation and robust synchronization is presented, showing that even under severe interference conditions, a reliable synchronization can be accomplished, hence confirming the feasibility of the inlay concept.

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“…in [8] or [9]. However, these investigations are based on the assumption of perfect synchronization.…”

Section: Receiver Designmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Receiver optimization for L-DACS1

Epple

Brandes

Gligorevic

et al. 2009

2009 IEEE/AIAA 28th Digital Avionics Systems Conference

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“…In addition, in order to reflect the user data losses in the wireless channel during the handover (i.e., when the a/c is close to the boundary of the cell), we consider realistic FER values that are obtained from L-DACS 1 physical layer simulator [11]. The simulations take a realistic En route channel model as well as interference, induced by the DME, which operates in the same frequency range, into account.…”

Section: Received Power and Wireless Channel Errorsmentioning

confidence: 99%

Performance Evaluation of Network Mobility Handover over Future Aeronautical Data Link

Ayaz

Hoffmann

Sommer

et al. 2010

2010 IEEE Global Telecommunications Conference GLOBECOM 2010

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The aviation community is currently working on the standardization of data communication systems for the future air traffic management. In this context, International Civil Aviation Organization (ICAO) has initiated a work on standardization of an IPv6-based aeronautical telecommunications network and on future radio access technologies, respectively. In this paper, we integrate L-Band Digital Aeronautical Communications System Option 1 (L-DACS 1), which is one candidate for future radio access technologies, with realistic IPv6-based network layer functionality and analyze the effect of handover delay to the TCP performance. Realistic Frame Error Rate (FER) values obtained from an L-DACS 1 physical layer simulator, which uses a realistic aeronautical channel model, are used in the simulation experiments. In the first stage, we decreased layer 3 handover latency by removing the Duplicate Address Detection (DAD) procedure for address configuration. In the second stage, we introduced a Home Agent (HA)-buffering method, which is used to buffer the traffic (destined to the mobile node) during handover. Transmission completion time is the primary performance metric in our analysis. With the HA-buffering method, the transmission completion time is reduced by at least 10% for the transmission of 110 kB of information over a wireless link with 31.5 kbit s −1 data rate.

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“…One example of a link technology under development for direct A/G radio communication is the L-band Digital Aeronautical Communication System (L-DACS)-1 communication standard (Brandes et al, 2009) and (ICAO, 2010). The different conceptual options to use the TCP protocol and the requirements to a transport protocol have been reported in (Kissling & Graupl, 2008) and (Ehammer, Graupl, Rokitansky & Kissling, 2009).…”

Section: System Architecturementioning

confidence: 99%