On the Impact of CW interference on 5G NR

Fors, Karina; Axell, Erik; Linder, Sara; Stenumgaard, Peter

doi:10.1109/emceurope.2019.8871665

Cited by 8 publications

(5 citation statements)

References 7 publications

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“…Both RATs use Orthogonal Frequency Division Multiplexing (OFDM) to cope with multipath fading. This OFDM technique has shown to be susceptible to single and multiple CW [12]. The exact frequency difference between the CW and the subcarrier of the OFDM subchannel also has a large effect [12] due to spectral leakage [13].…”

Section: Environmentmentioning

confidence: 99%

“…This OFDM technique has shown to be susceptible to single and multiple CW [12]. The exact frequency difference between the CW and the subcarrier of the OFDM subchannel also has a large effect [12] due to spectral leakage [13]. Hence, we propose to test the RAT with at least 10 different frequencies per OFDM subchannel.…”

Section: Environmentmentioning

confidence: 99%

“…In the case under consideration, this is limited to a frequency change of only ≈44 Hz in total. Yet it would still be enough for the CW interference to hop from the one OFDM subchannel to the other making CW removal techniques as shown in [12] possibly more difficult. Allthough probably not of big influence in comparison with a stable CW interference, this effect should definitely be considered and evaluated.…”

Section: B Moving Scenariomentioning

confidence: 99%

See 2 more Smart Citations

The Need For and How To Evaluate Continuous Wave Immunity of Wireless Systems used in V2X Applications

Claeys

Ovechkin

Vanoost

et al. 2020

2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE

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This paper describes an intial study of the susceptibility to EMI of the wireless technologies which are or will be used in Intelligent Transportation Systems (ITS). In recent literature reliability comparisons between the two newest Radio Access Technologies (RATs) IEEE802.11bd and NR V2X are starting to appear. Yet none of them consider single/multiple frequency EMI as a possible interference despite the fact that these can and will appear in reality. In this paper two simulation methods and a real-life test method, in a reverberation chamber, are proposed to evaluate the reliability of the RATs under these interferences. Single-frequency CW interference evaluation is possible for a limited number of combinations using simulations, but multifrequency CW simulations are nearly impossible to evaluate due to the large amount of possible combinations. Solutions are proposed to use a smaller test set of combinations. Evaluation of the RATs using simulations can be very useful, but will never reveal the full story how the RAT will react to interference. Therefore, a real-life test method in a reverberation room, or MIMO Antenna measurement system, is proposed trying to cover the full RAT protocol for a similar set of test combinations.

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Section: Environmentmentioning

confidence: 99%

Section: Environmentmentioning

confidence: 99%

Section: B Moving Scenariomentioning

confidence: 99%

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The Need For and How To Evaluate Continuous Wave Immunity of Wireless Systems used in V2X Applications

Claeys

Ovechkin

Vanoost

et al. 2020

2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE

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“…These interferences can be represented as continuous wave (CW) electromagnetic disturbances (EMDs). OFDM systems are susceptible to a spectral leakage phenomenon, which makes ASs vulnerable to CW EMDs [3], [4]. This means that a potential vulnerability to CW EMDs must be tackled before the mass deployment of ASs.…”

Section: Introductionmentioning

confidence: 99%

Deploying a Continuous Wave Electromagnetic Disturbance Removal Algorithm on an OFDM System

Ovechkin,

Leeman,

Vanoost

et al. 2023

2023 International Symposium on Electromagnetic Compatibility – EMC Europe

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This paper describes the physical validation of the continuous wave electromagnetic disturbance removal algorithm for orthogonal frequency division multiplexing communication systems. The validation is done by deploying the algorithm in a laboratory setting. Due to the assumptions being made during the simulation process of the algorithm, the validation process describes the key aspects that must be taken into account during actual deployment. For instance, it is shown that in orthogonal frequency division multiplexing-based systems, a continuous wave disturbance can completely break equalization. Therefore, to perform validation, the disturbance has to be injected so that it will not affect the signal's preamble. During the validation, it was shown that the algorithm under investigation is effective and can result in the algorithm's gain of more than 18 dB for specific bit error rate ratios and modulation schemes.

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“…1) Cancellation based on: a) estimation [10], [11]; b) spectral leakage property [12]; c) soft/hard decision [13], [14]. 2) Filtering [15], [16].…”

Section: Introductionmentioning

confidence: 99%

A Novel Method of Removing the Influence of Continuous Electromagnetic Wave Disturbances in OFDM Systems

Ovechkin

Claeys

Vanoost

et al. 2022

IEEE Trans. Electromagn. Compat.

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This paper describes a novel technique for removing the influence of a continuous wave (or narrowband) electromagnetic disturbance in orthogonal frequency division multiplexing (OFDM) systems with quadrature amplitude modulation (QAM) or phase-shift keying (PSK) modulation schemes. The technique relies on a mathematical derivation of how a continuous wave electromagnetic disturbance induces spectral leakage in the OFDM system. Using this derivation, an algorithm is obtained that aims to cancel the continuous wave electromagnetic disturbance by estimating its frequency, retrieving its amplitude and phase from the corrupted OFDM frame. Note that the algorithm does not require any prior information about the disturbance. The proposed algorithm is validated through thorough simulations, covering different modulations, noise variations and spectral leakage cases, and compared with standard OFDM performance without the algorithm. Through our experimentation it has been demonstrated that for a disturbance frequency not equal to one of the OFDM subcarriers, the algorithm can estimate the disturbance frequency with high precision, resulting in a gain of more than 80 dB when compared to the case without the algorithm. For a disturbance frequency equal to one of the OFDM subcarriers, a simple coding technique such as Hamming & interleaving enables the user to remove the disturbance.

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On the Impact of CW interference on 5G NR

Cited by 8 publications

References 7 publications

The Need For and How To Evaluate Continuous Wave Immunity of Wireless Systems used in V2X Applications

The Need For and How To Evaluate Continuous Wave Immunity of Wireless Systems used in V2X Applications

Deploying a Continuous Wave Electromagnetic Disturbance Removal Algorithm on an OFDM System

A Novel Method of Removing the Influence of Continuous Electromagnetic Wave Disturbances in OFDM Systems

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