Low complexity fast filter bank-based channelization in L-DACS1 for aeronautical communications

Dhabu, Sumedh; Vinod, A. P.; Madhukumar, A. S.

doi:10.1109/newcas.2015.7181995

Cited by 10 publications

(13 citation statements)

References 8 publications

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“…Recently, few works dealing with the design and implementation of OFDM-based LDACS transceiver have been proposed [5,13,30,31,38,39]. In [30], novel correlation based synchronization approach for large carrier frequency offsets has been introduced, and its implementation on field programmable gate arrays (FPGA) has shown to consume lower area and power without compromising on the BER performance [31].…”

Section: Literature Reviewmentioning

confidence: 99%

“…On the receiver side, reconfigurable low complexity filter and filter bank architectures for channelization and spectrum sensing applications have been proposed in [5,13]. Such architectures are based on frequency response masking approach, and they allow the LDACS receiver to receive and sense single as well as multiple frequency bands simultaneously.…”

Section: Literature Reviewmentioning

confidence: 99%

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New Spectrum Efficient Reconfigurable Filtered-OFDM Based L-Band Digital Aeronautical Communication System

Agrawal

Darak

Bader

2019

IEEE Trans. Aerosp. Electron. Syst.

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To meet an ever-increasing demand of the spectrum for aeronautical communication, we propose new L-band digital aeronautical communication system (LDACS) using reconfigurable filtered OFDM (Ref-OFDM). The proposed protocol enables transceivers to dynamically adapt the transmission bandwidth over a wide range to meet the desired quality of service, and high out-of-band attenuation leads to significant improvement in the vacant spectrum utilization. We support our claims via simulation and complexity comparison results for various realistic channel conditions.

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Section: Literature Reviewmentioning

confidence: 99%

Section: Literature Reviewmentioning

confidence: 99%

New Spectrum Efficient Reconfigurable Filtered-OFDM Based L-Band Digital Aeronautical Communication System

Agrawal

Darak

Bader

2019

IEEE Trans. Aerosp. Electron. Syst.

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“…A digital filter bank is used to split the wide band into several sub-bands. In this work, the fast filter bank (FFB) based channeliser proposed in [8,13], used for obtaining uniform sub-bands meeting the stringent LDACS spectral mask specifications with low complexity. An 8-channel FFB design is used in the spectrum sensing unit.…”

Section: Filter Architecturementioning

confidence: 99%

An Adaptive Energy Detection Scheme with Real-Time Noise Variance Estimation

Mathew

Shreejith

Vinod

et al. 2019

Circuits Syst Signal Process

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Energy detection-based spectrum sensing techniques are ideally suited for power-constrained cognitive radio applications because of their lower computational complexity compared to feature detection techniques. However, their detection performance is dependent on multiple factors like accuracy of noise-variance estimation and signal to noise ratio (SNR). Many variations of energy detection techniques have been proposed to address these challenges; however they achieve the desired detection accuracy at the cost of increased computational complexity. This restricts the use of enhanced energy detection schemes in power-constrained applications such as aeronautical communication. In this paper, an adaptive lowcomplexity energy detection scheme is proposed for spectrum sensing in an L-band Digital Aeronautical Communication System (LDACS) at lower SNR levels. Our scheme uses a real time noise variance estimation technique using autocorrelation which is induced by the cyclic prefix property in LDACS signals. The proposed technique does not incur dedicated hardware blocks for noise variance estimation, leading to an efficient hardware implementation of the scheme without significant resource overheads. The simulation studies of the proposed scheme shows that the desired accuracy (90% detection accuracy with only 10% of false alarms) can be achieved even at -16.5 dB SNR, significantly lowering the SNR wall over existing energy detection schemes.

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“…It calls for the development of a set of cognitive networking testbeds that can be used in real-time in aircraft to evaluate their performance accuracy at various stages of their operation. They should possess high-speed and low complexity processing units (DSPs or FPGAs) performing computationally demanding signal processing tasks with relatively little delay [171], [172], [173]. Furthermore, interoperability over a wide range of spectrum bands is necessary since different bands are used in different flight domains (C-band in airport surface, VHF band, and L-band in the continental airspace, satellite-based solutions for remote, oceanic and polar domains) [174].…”

Section: G Prototyping Of the Aeronautical Cognitive Radio Systemsmentioning

confidence: 99%

Cognitive Radio for Aeronautical Communications: A Survey

et al. 2016

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Novel Air Traffic Management (ATM) strategies are proposed through the Next Generation Air Transportation (NextGen) and Single European Sky for ATM Research (SESAR) projects to improve the capacity of the airspace and to meet the demands of the future air traffic. The implementation of the proposed solutions leads to increasing use of wireless data for aeronautical communications. Another emerging trend is the unmanned aerial vehicles. The unmanned aerial systems (UASs) need reliable wireless data link and dedicated spectrum allocation for its operation. On-board broadband connectivity also needs dedicated spectrum to satisfy the quality of service (QoS) requirements of the users. With the growing demand, the aeronautical spectrum is expected to be congested. However, the studies revealed that the aeronautical spectrum is underutilized due to the static spectrum allocation strategy. The aeronautical communication systems such as air-air and airground communication systems, inflight infotainment systems, wireless avionics intra-communications (WAIC), and UAS can benefit significantly from the introduction of cognitive radio based transmission schemes. This article summarizes the current trends in aeronautical spectrum management followed by the major applications and contributions of cognitive radio in solving the spectrum scarcity crisis in the aeronautical domain. Also, to cope with the evolving technological advancement, researchers have prioritized the issues in the case of cognitive radio that needs to be addressed depending on the domain of operation. The proposed cognitive aeronautical communication systems should also be compliant with the Aeronautical Radio Incorporated (AR-INC) and Aerospace Recommended Practice (ARP) standards. An overview of these standards and the challenges that need immediate attention to make the solution feasible for a largescale operation, along with the future avenues of research is also furnished.

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Low complexity fast filter bank-based channelization in L-DACS1 for aeronautical communications

Cited by 10 publications

References 8 publications

New Spectrum Efficient Reconfigurable Filtered-OFDM Based L-Band Digital Aeronautical Communication System

New Spectrum Efficient Reconfigurable Filtered-OFDM Based L-Band Digital Aeronautical Communication System

An Adaptive Energy Detection Scheme with Real-Time Noise Variance Estimation

Cognitive Radio for Aeronautical Communications: A Survey

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