OFDM Receiver Structure for a Subband-Selective Mitigation of Time-Variant Interference

Hirschbeck, Martin; Huber, Johannes B.

doi:10.1109/tvt.2015.2513442

Cited by 8 publications

(14 citation statements)

References 12 publications

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“…Table IV shows the number of CM for the proposed LDACSI-CR technique. It is noted that the CM required in the proposed technique is 4008 which is smaller than the minimum CM required in a previous work of [7] which is 11398. Accordingly, the proposed technique provides less complexity which provides less processing time and, consequently, less time delay.…”

Section: Complexity Analysismentioning

confidence: 62%

“…DME mitigation curve) and without mitigation (i.e. No mitigation curve) for en-route channel [7] assuming QPSK system. It also shows BER in the absence of DME (i.e.…”

Section: A Simulation Results For Dme Energy Detector and System Permentioning

confidence: 99%

“…The DME channels occupy a band over the range from 962MHz up to 1213 MHz with 252 stations, 126 channels assigned for X mode and 126 channels assigned for Y mode. The DME signal is defined as Gaussian shaped pulse pairs [7]. The aircraft interrogates the DME ground station by transmitting a series of pulse-pairs which is called interrogations.…”

Section: The Impact Of Dme Interference On Ldacsimentioning

confidence: 99%

“…Therefore, the DME interference mitigation techniques is required. Several techniques have been introduced to mitigate the DME impulsive interference in ATM systems [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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Cognitive Radio Techniques for Utilizing the Primary L-Band Distance Measuring Equipment for Aeronautical Communications

et al. 2020

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The aeronautical communication has been switched from the congested very high frequency (VHF) band to occupy the L-band, namely, L-band digital aeronautical communication system type I (LDACSI). Critical navigation system in this band is the distance measurement equipment (DME). However, the DME channels provide a severe interference to onboard LDACSI receiver. In this paper, a cognitive radio (CR) network is proposed to allow efficient spectrum reuse with coexisting primary DME channels. In LDACSI-CR network, the proposed spectrum sensing technique is performed by using an adaptive threshold DME energy detector to achieve the best trade-off between the DME signal detection and false alarm. Moreover, dynamic spectrum access, namely, hybrid spectrum access (HSA) is newly introduced to enhance the LDACSI-CR throughput. Joint effect of HSA with different frame structures on the LDACSI throughput is proposed. Besides, optimal power allocation using genetic algorithm that maximizes the LDACSI-CR ergodic throughput for HSA with different frame structures is proposed. In this work, the closed form expression for the probability of DME detection, false alarm, detection error, the LDACSI throughput and data loss are derived. Simulation is performed and the results show the LDACSI throughput and the data loss for the proposed techniques. Besides, ergodic throughput maximization for HSA under constraints of the average LDACSI transmitted power and tolerable interference power on the DME signal is performed. Moreover, simulation results show that the proposed LDACSI-CR system performance provides lower bit error rate and less complexity compared to the previous work.

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Section: Complexity Analysismentioning

confidence: 62%

“…DME mitigation curve) and without mitigation (i.e. No mitigation curve) for en-route channel [7] assuming QPSK system. It also shows BER in the absence of DME (i.e.…”

Section: A Simulation Results For Dme Energy Detector and System Permentioning

confidence: 99%

Section: The Impact Of Dme Interference On Ldacsimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cognitive Radio Techniques for Utilizing the Primary L-Band Distance Measuring Equipment for Aeronautical Communications

et al. 2020

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“…In [10], the impact of LDACS on DME was measured and conditions for the operation of LDACS were extracted, under which the functionality of DME is not harmfully affected. Conversely, the impact of DME on LDACS was analysed in [11] and effective interference mitigation schemes for LDACS receivers have been proposed, e.g., in [12], [13].…”

Section: Introductionmentioning

confidence: 99%

Impact Assessment of the L-Band Digital Aeronautical Communications System on the Joint Tactical Information Distribution System

Bellido-Manganell

Gräupl

Schnell

2019

IEEE Trans. Veh. Technol.

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The L-band digital aeronautical communications system (LDACS) is the future air-ground communications technology currently undergoing the International Civil Aviation Organization (ICAO) standardization process. As LDACS is intended to operate in the frequency band 960-1164 MHz, compatibility tests between LDACS and the legacy systems operating in this frequency band are necessary to ensure that no system is harmfully interfered. One of these systems is the joint tactical information distribution system (JTIDS), a technology employed by the tactical data link Link 16. In this paper, we present the results of an impact assessment of LDACS on JTIDS conducted through simulations. The extent of the impact has been quantified by simulating a wide variety of interference configurations, which are expected to cover most realistic interference conditions between LDACS and JTIDS. Baseband simulation models of both systems have been implemented and an interference scenario between LDACS and JTIDS has been defined. To evaluate the impact, the degradation of the signal-to-noise ratio (SNR) of JTIDS by the presence of LDACS has been determined. Default JTIDS transmissions, where the information is repeated at distant frequencies, do not show a significant degradation by the presence of strong LDACS interference, with an SNR loss lower than 1 dB in any considered interference scenario. Comparatively, a certain dependency on the specific LDACS deployment is noticeable for less protected JTIDS transmissions. Based on the observed interdependencies, recommendations for the deployment of LDACS are given in this paper, such that the impact of LDACS on JTIDS is minimized.Index Terms-Future communications infrastructure (FCI), interference, L-band digital aeronautical communications system (LDACS), Link 16, multifunctional information distribution system (MIDS), tactical data link (TDL), joint tactical information distribution system (JTIDS).

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Nested code division multiple access for distance measuring equipment interference mitigation in L‐band digital aeronautical communication system

Abd-Elaty

Zekry

Elagooz

et al. 2021

Int J Communication

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Summary Air‐to‐ground (A/G) communications have been transferred from the congested very high frequency (VHF) band to occupy the guard bands between adjacent distance measurement equipment (DME) navigation channels within the L‐Band. However, the inlayed channels, called L‐band digital aeronautical communication system (LDACS) channels, experience severe interference with the coexisting DME channels. In this paper, a DME interference detection and mitigation technique is proposed to improve the performance of the LDACS in the presence of DME interference. The DME energy detector based on Neyman–Pearson test is proposed, which has more advantages than the other techniques due to its noncoherent nature and simplicity. Furthermore, the proposed DME detection technique is performed by using an adaptive threshold to achieve the best trade‐off between the DME signal detection and false alarm. The proposed DME interference mitigation technique relies on the proposed concept of nested RF upconversion, where the in‐phase and the quadrature components of an LDACS signal are forwarded to a code division multiple access (CDMA) block in which they are transmitted only over the quadrature branch once DME interfering signal is detected. In this work, the closed form expression for the probability of DME detection, false alarm, and the detection error rate are derived. Simulation is performed, and the results show that the proposed technique provides improvement in the probability of DME detection and the detection error rate compared to the previous work. Also, simulation results shows that the proposed technique provides lower bit error rate and less complexity compared to the previous work.

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OFDM Receiver Structure for a Subband-Selective Mitigation of Time-Variant Interference

Cited by 8 publications

References 12 publications

Cognitive Radio Techniques for Utilizing the Primary L-Band Distance Measuring Equipment for Aeronautical Communications

Cognitive Radio Techniques for Utilizing the Primary L-Band Distance Measuring Equipment for Aeronautical Communications

Impact Assessment of the L-Band Digital Aeronautical Communications System on the Joint Tactical Information Distribution System

Nested code division multiple access for distance measuring equipment interference mitigation in L‐band digital aeronautical communication system

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