June 2025
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11 Reads
Measurement
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Publications (91)
August 2024
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27 Reads
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1 Citation
Underground cable monitoring is a critical task for DSOs. During the operation or commissioning, the insulation of the underground cable may be deteriorated. Thus, PDs may occur through the insulation layers. It is wise to detect and locate the PDs before severe insulation breakdowns. Comprehensive EMPT-ATP Draw based parametric analysis have been carried out in a representative cable feeder. The simulation results clearly show that the location of the PD can be detected with high accuracy using EMPT-ATP Draw model. With this motivation the real distribution network and HFCT are modeled. On-site PD measurement results and EMPT-ATP Draw simulation results are compared. Results obtained from a real on-site measurements and EMPT-ATP Draw model were found to be similar.
July 2024
June 2024
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9 Reads
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2 Citations
May 2024
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7 Reads
April 2024
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2 Reads
Mathematics Magazine
November 2023
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10 Reads
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7 Citations
IEEE Transactions on Vehicular Technology
This paper introduces the secrecy analysis of the index modulation-based orthogonal frequency division multiple access (IM-OFDMA) schemes by considering the in-phase and quadrature imbalance (IQI) presence at the users' RF front ends. In particular, by assuming the existence of an eavesdropper, the secrecy performance of the considered uplink multiple-access system is investigated through the strictly positive secrecy capacity and secrecy outage probability, and closed-form expressions are derived for both quantities. Moreover, the secrecy performance is conducted regarding IQI compensation based on a preamble-based estimation method. Further, analysis of the impact of the different parameters of IM-OFDMA, IQI, and estimation method is included via analytical and simulation-based results. The results reveal that IM-OFDMA is more reliable in secrecy performance than OFDMA, regardless of whether IQI is present. Also, IQI compensation can lead to a better secrecy performance compared to the case of no IQI.
November 2023
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13 Reads
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9 Citations
IEEE Transactions on Smart Grid
This study proposes a novel method for signal detection and feature extraction based on the spectral correlation function, enabling improved characterization of grid-signal distortions. Our approach differs from existing treatments of signal distortion in its analysis of the varied spectral content of signals observed in real-world scenarios. The method we propose has state-of-the-art discriminative power that provides meaningful and understandable characterizations of various grid events and anomalies. To validate the approach, we use real world data from the Grid Event Signature Library, which is maintained jointly by Oak Ridge National Laboratory and Lawrence Livermore National Laboratory.
October 2023
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36 Reads
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9 Citations
IEEE Transactions on Vehicular Technology
Index modulation-based orthogonal division multiple access (IM-OFDMA) has recently been proposed as a potential technique for future wireless communication systems due to its superior spectral efficiency and error performance over conventional multiple access schemes. However, its performance is still under investigation by researchers in light of a variety of scenarios and assumptions. Following this direction, in this paper, the individual and joint effects of the transmitter (Tx) and receiver (Rx) in-phase and quadrature imbalances (IQI) on the bit-error-rate (BER) performance of the uplink IM-OFDMA scheme are investigated by considering whether each user's RF front-end is identical or not. Moreover, to reduce the detrimental effect of IQI, a preamble-based estimation and compensation method is proposed for IM-OFDMA. Closed-form expressions for the average BER of IM-OFDMA are obtained by considering the physical effect of the Tx and Rx IQI. Also, using Monte Carlo simulations, the derived expressions are verified under different system configurations. Analytical and simulation results reveal that Tx and Rx IQI cause an error floor in the BER performance of IM-OFDMA schemes. However, the proposed estimation and compensation method not only reduces the impact of IQI but also leads to a better BER performance compared to the case of no IQI, which mainly refers to the frequency diversity caused by the IQI.
July 2023
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3 Reads
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4 Citations
Citations (55)
... A portable and hand-use measurement system based on USRP (Universal Software Radio Peripheral) has been to locate PD signals in [19]. Different PD measurements were carried out on the cable feeder using the commercial PD measurement device [19]. ...
- Citing Conference Paper
June 2024
... In scenarios This article proposes a cascaded fault type detection model comprising three main components: anomaly area detection, ML-based fault presence detection, and ML-based fault type detection. The first part uses an envelope-based detector to identify the anomaly region as created in a previous study [37]. However, we enhance this concept by adapting a new filter design to account for the noisier nature of power grid signals collected from meters compared with simulated signals. ...
- Citing Conference Paper
July 2023
... Current methods are limited by the assumption that signals are stationary, which is not practical in a real-world scenario. A novel method using the spectral correlation function (SCF) allows for improved characterization of grid-signal distortions because it evaluates non-stationary signals [40]. This method uses the correlation between spectral components of a signal to extract meaningful features. ...
- Citing Article
November 2023
IEEE Transactions on Smart Grid
... In [13], a reduced-complexity detector for IM-OFDMA using convolutional neural networks is presented, while a loglikelihood ratio based detector is proposed in [14]. Secrecy analysis of IM-OFDMA is conducted in [15]. Results in the aforementioned works confirm the superiority of IM-OFDMA in different performance aspects. ...
- Citing Article
- Full-text available
January 2023
IEEE Access
... The RF fading and the FSO atmospheric turbulence follow κ − µ and Gamma-Gamma models, respectively, in [333], α − µ and Malaga models, respectively, in [334] and Nakagami-m and Gamma-Gamma models, respectively, in [335]. A dual-hop parallel FSO/RF system has been adopted in [336] where both links are active at each hop. Secrecy analysis has been conducted considering the presence of an eavesdropper close to the receiver and assuming Nakagami-m and Gamma-Gamma for the RF fading and FSO turbulence, respectively. ...
- Citing Article
- Full-text available
January 2023
IEEE Access
... The direct converting layout is more attractive for the front-end of wireless schemes the typical superheterodyne architecture. This is because it has a smaller size and is easier to integrate on a compact chip [35]. Moreover, it provides exceptional flexibility to cater to the changing requirements of modern communication facilities for broadcast protocols. ...
- Citing Article
October 2023
IEEE Transactions on Vehicular Technology
... In the literature, several works have investigated the performance of IM-OFDMA from different aspects. For example, the error performance of IM-OFDMA is investigated considering IQ imbalance in [11] and imperfect channel estimation in [12]. In [13], a reduced-complexity detector for IM-OFDMA using convolutional neural networks is presented, while a loglikelihood ratio based detector is proposed in [14]. ...
- Citing Conference Paper
January 2023
... Balancing innovation with security is crucial. Therefore, studying adaptable and comprehensive regulatory frameworks is essential for fostering a secure and resilient energy ecosystem Ekti et al. 2022). Addressing these cyber-physical-social challenges through real-time anomaly detection algorithms in a trustable environment requires a multidisciplinary approach to create a more resilient, efficient, and sustainable energy future. ...
- Citing Article
- Full-text available
November 2022
... The results presented a statistical model correlating attenuation, frequency and visibility, utilizing NASA data dedicated to the Gulf region. The study compared the attenuation effects caused by sandstorms with those from rain and gaseous absorption, offering valuable insights into how various atmospheric conditions influence communication network performance [9]. ...
- Citing Conference Paper
August 2022
... Its SE aligns with that of classical IMMA. CNN-Based uplink IM-OFDMA [36] One-dimensional A detector employing a convolutional neural network was applied to conventional IM-OFDMA utilizing transmitted signals and channel state information as input. This approach has reduced the computational complexity of the ML detector, albeit with a marginal decline in BER. ...
- Citing Conference Paper
December 2021