On the Design of Variable Filtered-OFDM Based LDACS for Future Generation Air-to-Ground Communication System

Roy, Subhabrata; Chandra, Abhijit

doi:10.1109/tcsii.2021.3098913

Cited by 7 publications

(2 citation statements)

References 18 publications

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“…To mitigate the interference to other L-band aeronautical systems, some variants of LDACS, which improve the spectrum characteristics of Orthogonal Frequency Division Multiplexing (OFDM), were proposed. These include a reconfigurable filtered-OFDM [25], variable filtered-OFDM [26], and Filter Bank Multi-Carrier (FBMC) [27]. However, these variants have not been incorporated in the LDACS specification [11] yet.…”

Section: Related Workmentioning

confidence: 99%

Rapid Prototyping and International Validation Activity for the L-Band Digital Aeronautical Communications System (LDACS)

Morioka,

Kohmura,

Yonemoto

et al. 2023

IEEE Open J. Commun. Soc.

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The L-band Digital Aeronautical Communications System (LDACS) is a cellular-based broadband, secure digital aeronautical communications system designed to enhance the safety and efficiency of air traffic management (ATM) through the facilitation of innovative ATM paradigms, such as 4D trajectory-based operations (TBO). LDACS is in its final stages of standardization by the International Civil Aviation Organization (ICAO) and the European Organisation for Civil Aviation Equipment (EUROCAE). Furthermore, it has been introduced to not only the aviation industry but also the Internet community in the form of an informational Request For Comments (RFC). Rapidly creating prototypes of an international communications standard by multiple organizations is crucial to the effective deployment of that standard. This approach enables validation and interoperability testing across various countries' prototypes. Therefore, first, we create an LDACS prototype through a software/hardware co-design strategy by Software Defined Radio (SDR) and High-Level Synthesis (HLS). This approach expedites and economically streamlines the development process. Second, we show the alignment of our prototype with the LDACS specification through preliminary and cell entry tests. Third, we demonstrate the efficacy of LDACS' Quality of Service (QoS) and security features via end-to-end IPv6 connectivity and security tests. Finally, the soundness and clarity of the LDACS specification is evidenced via interoperability tests between our prototype and a European counterpart.

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Section: Related Workmentioning

confidence: 99%

Rapid Prototyping and International Validation Activity for the L-Band Digital Aeronautical Communications System (LDACS)

Morioka,

Kohmura,

Yonemoto

et al. 2023

IEEE Open J. Commun. Soc.

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“…Furthermore, according to [24], the error of the Farrow-structure design is smaller than that of the conventional Lagrange-based design with the same filter order. To date, the Farrow-structure filter has been adopted in many applications [25,26]. A comparison of the FIR filter, conventional IIR filter, and Farrow-structure filter is provided in Table 1.…”

Section: Introductionmentioning

confidence: 99%

A Novel Fractional Delay Proportional–Integral Multi-Resonant-Type Repetitive Control Based on a Farrow-Structure Filter for Grid-Tied Inverters

Liang,

Lee,

Zhao

2023

Electronics

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The integer-order delay of proportional–integral multi-resonant-type repetitive control (PIMR-RC) cannot provide excellent control performance for grid-tied inverters when the grid frequency fluctuates. To address this issue and reduce control errors, a fractional delay PIMR-RC (FD-PIMR-RC) scheme is proposed. In addition, to reduce the computational load and memory consumption, a Farrow-structure fractional delay (FFD) filter is adopted. The digital filter with the Farrow structure is flexibly and efficiently used for fractional delay. For each new fractional delay, a large number of calculations and storage for the FFD filter coefficients are avoided, which significantly reduces the computational load and memory consumption. The parameter design of the FD-PIMR-RC scheme is provided in detail, including the implementation of fractional delay based on the Farrow structure. Then, a system stability analysis and parameter optimization are presented. Finally, simulations for the steady-state and dynamic responses are presented, and the validity of the proposed method is demonstrated.

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Low-complexity reconfigurable FIR lowpass equalizers for polynomial channel models

Moryakova,

Wang,

Johansson

2024

Digital Signal Processing

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On the Design of Variable Filtered-OFDM Based LDACS for Future Generation Air-to-Ground Communication System

Cited by 7 publications

References 18 publications

Rapid Prototyping and International Validation Activity for the L-Band Digital Aeronautical Communications System (LDACS)

Rapid Prototyping and International Validation Activity for the L-Band Digital Aeronautical Communications System (LDACS)

A Novel Fractional Delay Proportional–Integral Multi-Resonant-Type Repetitive Control Based on a Farrow-Structure Filter for Grid-Tied Inverters

Low-complexity reconfigurable FIR lowpass equalizers for polynomial channel models

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