Distance Measuring Equipment and its Evolving Role in Aviation

Kelly, Robert J.; Cusick, Danny R.

doi:10.1016/s0065-2539(08)60854-9

Cited by 22 publications

(13 citation statements)

References 55 publications

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“…Given the vast existing investments in DME and its worldwide adoption as an International Civil Aviation Organization (ICAO) radionavigation aid, it seems prudent to further build upon DME to provide capabilities to support future airspaces. To gain these additional capabilities with DME, the FAA and other groups have examined enhanced DME (eDME) concepts (Ertan & Psiaki, 2016;Kim, Kim, Song, Kim, & Kee, 2013;Kim et al, 2015 Kelly and Cusick (1986) [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com and www.ion.org]…”

Section: Dme and Dme Pseudolitementioning

confidence: 99%

Flight test of a pseudo‐ranging signal compatible with existing distance measuring equipment (DME) ground stations

Chen

Enge

et al. 2020

Navigation

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Distance measuring equipment (DME) has been a cornerstone of aviation navigation for the last 70 years. While GNSS is taking an increasingly important role in civil aviation, DME can still play an important role in a robust aviation infrastructure in the foreseeable future. Advanced concepts have been developed to improve DME performance and capabilities. One concept is a DME‐based pseudolite that position modulates existing DME pulse pairs. It is interoperable with DME operations and can be generated using the currently fielded DME transponders with an appliqué. This concept is suitable as a robust alternative to GNSS for aviation navigation or timing. The paper examines the performance of DME pseudolite implemented via an appliqué on a DME transponder. The paper examines the synchronization and data performance of the DME pseudolite signal in the air and on the ground. The paper compares the actual performance to theoretical results.

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Section: Dme and Dme Pseudolitementioning

confidence: 99%

Flight test of a pseudo‐ranging signal compatible with existing distance measuring equipment (DME) ground stations

Chen

Enge

et al. 2020

Navigation

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“…The TOA prediction performance is assessed against multipath generated using the same parameters values in Table 1 except that the peak amplitude ratio of the first multipath to the direct, α 1 , is limited to 0.5. The reason for this is that α 1 is expected be less than 0.5 in most cases (Kelly & Cusick 1986). However, the estimator was derived by using training data having α 1 up to 1.0 such that some rare multipath having equal or even slightly higher power than the direct would be effectively suppressed as well.…”

Section: Simulation Approach: Pulse Waveform Variation and Multipath mentioning

confidence: 99%

Multipath Mitigation for Pulses Using Supervised Learning: Application to Distance Measuring Equipment

Kim¹

2016

Journal of Positioning, Navigation, and Timing

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“…The interrogation (or reply) frequencies from two adjacent channels are generally separated by 1 MHz. More details are given in [3]. DME FOR APNT DME/TACAN has many desirable features for providing APNT service.…”

Section: Distance Measuring Equipmentmentioning

confidence: 99%

Design of a Passive Ranging System Using Existing Distance Measuring Equipment (DME) Signals & Transmitters

Enge

Narins

2015

J Inst Navig

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ABSTRACT:The US Federal Aviation Administration (FAA) is developing alternative navigation concepts to maintain operational capacity and efficiency even with the loss of Global Positioning System (GPS). One concept being studied for alternative position navigation and timing (APNT) is a ground based passive ranging system. This system has few capacity constraints and can provide other benefits. The APNT passive ranging system would use existing FAA terrestrial infrastructure, particularly distance measuring equipment (DME) ground beacons. APNT project team has developed a DME Pseudolite (PL) concept that enables a passive ranging signal on DME that is compatible with existing DME operations. It can provide additional benefits for APNT and non-APNT users with its data transmission. This paper introduces the DME PL concept and assesses the potential performance of the system. The paper focuses on signal structure design for best data capacity. It formulates a methodology and modeling for the developing the design. Copyright # 2015 Institute of Navigation. OUTLINEThe paper is divided into four sections. The first section reviews basic DME operations and introduces the basic concept of DME PL. It discusses how DME PL and traditional DME differ and complement each other. Also discussed are the requirements and desired capabilities for the design.The next two sections analyze the performance of the DME PL signal design when it functions alongside DME. The second section examines measured signal precision. The third section focuses on determining the best signal structure design in terms of effective data rate. It develops a methodology and modeling tools to optimize the design. These tools represent an important outcome as the current design specification represents a starting point. As those specifications are refined, the tools can be applied to optimize the system based on the new limitations. Furthermore, the tools are useful in design trade-off studies. The paper examines modifications to the basic concept that would improve data capacity but at the expense of increased changes to the ground station. The tools help quantify the benefits of the modifications.The last section discusses signal design concepts to handle unique DME interference. In particular, DME Morse code transmissions, sent every 30-40 sec [1], can be problematic for DME PL if these are not accounted for. The section discusses how DME PL would operate during these occurrences to retain its ranging capabilities. BACKGROUND

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Distance Measuring Equipment and its Evolving Role in Aviation

Cited by 22 publications

References 55 publications

Flight test of a pseudo‐ranging signal compatible with existing distance measuring equipment (DME) ground stations

Flight test of a pseudo‐ranging signal compatible with existing distance measuring equipment (DME) ground stations

Multipath Mitigation for Pulses Using Supervised Learning: Application to Distance Measuring Equipment

Design of a Passive Ranging System Using Existing Distance Measuring Equipment (DME) Signals & Transmitters

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