Héla Gassara

Tunis University

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Fatma Rouissi

Tunis University

Adel Ghazel

Institut de Recherche en Systèmes Electroniques Embarqués

Safa Najjar

Tunis University

A. J. Han Vinck

University of Duisburg-Essen

Fethi Tlili

University of Carthage

W. Belhaj Sghaier

University of Carthage

Patricia Desgreys

Télécom Paris

Fabrice Duval

Centre Hospitalier Universitaire de Martinique

Patrick Loumeau

Télécom Paris

Pascal Febvre

Institut de Microélectronique, Electromagnétisme et Photonique

Cooperative Institutions

University of Carthage

Tunis University

Institut Supérieur des Études Technologiques en Communications de Tunis

Centre National de la Recherche Scientifique

École Normale Supérieure - PSL

Université Tunis Carthage

Carthage College

Télécom Paris

Laboratoire Traitement et Communication de l’Information

Institut Mines-Télécom

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Top-down random channel generator for the narrowband power line communication

AEU - International Journal of Electronics and Communications (2018)

Héla Gassara Fatma Rouissi Adel Ghazel

Narrowband

Coherence bandwidth

Root mean square

Power-line communication

Power delay profile

10.1016/j.aeue.2018.03.003

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Citations (8)

A Novel Stochastic Model for the Impulsive Noise in the Narrowband Indoor PLC Environment

Héla Gassara Fatma Rouissi Adel Ghazel

This paper presents a novel stochastic model for the impulsive noise measured in the narrowband indoor Power Line Communication (PLC) environment. Based on extensive measurements carried out inside several buildings, the impulsive noise has been characterized and modelled for the low frequency range transmission over power lines. An appropriate method has been used to finely extract pulses and their characteristic parameters, and four different classes has been defined with adequate parametric models based on empirical approach. Class 1 pulses, which correspond to single pulses in the form of damping sinusoids, present the majority of the extracted pulses. These pulses, with pseudo-frequencies below 500 kHz, have been statistically modelled by fitting the model parameters deduced from measurements with proper distribution functions. This stochastic modelling is useful for generating impulsive noise in order to assess the performance of narrowband communication chains and to improve the design of PLC systems operating in the CENELEC/FCC/ARIB low frequency bands.

Narrowband

Power-line communication

Impulse noise

Parametric model

Stochastic modelling

10.1109/i2mtc.2015.7151241

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Citations (17)

Design of an I/Q Mixer for a Bandpass ΔΣ ADC in Superconducting Technology

Héla Gassara Patricia Desgreys Patrick Loumeau Pascal Febvre

Electronic mixer

Source

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Citations (0)

Comparative study of modulation techniques performances for communication over narrowband Powerline channel characteristics

Safa Najjar Fatma Rouissi Héla Gassara Adel Ghazel

In this paper, we propose a study of modulation techniques performances in order to design a robust modem for narrowband Powerline Communications, with the required quality of service. We focus on binary and quaternary narrowband modulations, by the means of BER simulations and we expose modulated signals to real measured channel attenuation and impaired with channel noise, on the frequency band of 9 kHz to 500 kHz. At BER equal to 10 ⁻² and a moderately attenuated channel, BPSK gave better performance than BFSK with a gain of 4 dB and MSK gained 5 dB over QPSK.

Narrowband

Modulation (music)

Frequency-shift keying

Minimum-shift keying

10.1109/icmcs.2016.7905605

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Citations (4)

Statistical characterization and modelling of impulse noise on indoor narrowband PLC environment

Fatma Rouissi A. J. Han Vinck Héla Gassara Adel Ghazel

This paper focuses on the characterization and modelling of impulse noise in narrowband power line communication. Two modelling approaches of the measured noise are studied and compared: the memoryless Middleton class-A model and the Markov-Middleton model with memory. Model comparisons with measurements show that Markov-Middleton is compliant with the impulse noise temporal structure since it considers the pulse sample correlation. In the frequency domain, both models do not well represent the frequency behaviour of the impulse noise. Differences in duration and distribution in time of errors generated by measured/modelled noise are noticed.

Impulse noise

Narrowband

Impulse response

10.1109/isplc.2017.7897119

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Citations (23)

LSTM-Based Algorithm For Cooperative Communication in Impulse Noise Impaired PLC Channel

2022 International Symposium on Networks, Computers and Communications (ISNCC) (2023)

Fatma Rouissi W. B. Sghair Héla Gassara Fethi Tlili

In this paper, a Deep Learning algorithm based on Long Short-Term Memory (LSTM) model is proposed to solve the problem of relay selection in cooperative Power Line Communication (PLC) communications. The proposed approach addresses the constraint of impulse noise presence in PLC channel, and it is based on predicting the state of each relay link, whether it is characterized by a Gaussian or impulsive behavior. This prediction is used to establish a precise reward mechanism aimed at enhancing the decision-making process for relay selection. The efficiency of the examined algorithm is shown in terms of reduced accumulated regret and higher percentage of good selection, when compared to the conventional UCB.

Impulse noise

Selection algorithm

Power-line communication

Gaussian Noise

10.1109/isncc58260.2023.10323771

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Citations (0)

Coupling interface circuit design for experimental characterization of the narrowband power line communication channel

IEEE International Symposium on Electromagnetic Compatibility (2012)

Héla Gassara Mohamed Chaker Bali Fabrice Duval Fatma Rouissi Adel Ghazel

This paper presents the design of an appropriate coupling interface circuit for measuring indoor power line transmission channel characteristics in CENELEC/FCC/ARIB low-frequency bands. This coupling circuit prevents the powerful and damaging 50 Hz/220 V current from entering sensitive measurement equipments while allowing narrowband PLC signals reception. It also guarantees impedance matching and instruments protection from very large voltage spikes and fast transients. Tests following EN 50065-2-3 standard [1] are done to verify that the proposed coupling interface provides a high safety level and is in compliance with immunity requirements.

Narrowband

Power-line communication

Interface (matter)

10.1109/isemc.2012.6351760

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Citations (25)

Adaptive UCB MAB Algorithm forOptimizing Relay Selection in Narrowband Power Line Communication

W. Belhaj Sghaier Héla Gassara Fatma Rouissi Fethi Tlili

In this paper, we aim to apply artificial intelligence in order to solve the relay selection problem for two-hop cooperative narrowband Power Line Communication (NB-PLC), without channel side information. The communication channel is corrupted by periodic impulsive noise, which is modeled using Middleton Class-A noise. The main idea is to enhance the conventional multi-armed bandits (MAB) algorithm, called Upper-Bound Confidence (UCB), by integrating a classification process. This modification is intended to enable the UCB algorithm to adapt to non-stationary situations and address its limitations, specifically the requirement for multiple sequential tests to determine the optimal value of the main parameter in UCB which is instrumental in controlling the exploration level. The simulation results demonstrate that the proposed new algorithm outperforms the conventional UCB algorithm in terms of cumulative regret, probability of good selection, and Bit Error Rate (BER).

Narrowband

Selection algorithm

Noise power

10.1109/comnet60156.2023.10366719

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Citations (1)

Novel low complexity decoding method for the binary coded frequency shift keying modulation

Concurrency and Computation Practice and Experience (2020)

Safa Najjar Fatma Rouissi Héla Gassara AJ Han Vinck Adel Ghazel

Summary This paper proposes a coded modulation scheme based on frequency shift keying (FSK) modulation and a simple binary permutation code. FSK detection is based on the knowledge of the probability density function (PDF) of the noise and the attenuation of the channel, called FSK “Soft‐Decision” (FSK/SD) detection. We introduce an approximation of the FSK/SD, called FSK “Select Largest” (FSK/SL). We compare the FSK/SL detection with the classical PDF‐based detection techniques, such as FSK/SD and spread‐FSK (SFSK), for both coded and uncoded transmission. As a practical application, we use the power line communication (PLC) channel. We analyze and compare the performances for a narrowband PLC channel with attenuation and impulse noise.

Frequency-shift keying

McEliece Cryptosystem

Narrowband

10.1002/cpe.5760

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Citations (1)

OFDM communication chain performance assessment under realistic measured narrowband PLC channels and noise

Héla Gassara Fatma Rouissi Adel Ghazel

This paper evaluates the performance of narrowband Power Line Communication (PLC) orthogonal frequency division multiplexing (OFDM) transceivers which comply with the ITU-T G.9955 recommendation. The performance assessment is based on realistic conditions namely when considering measured PLC channels at low frequencies and in presence of measured stationary and impulsive noise. Channel estimation using pilot OFDM symbols is also compared to channel estimation based on pilot subcarriers and it is shown that the first one provides lower bit error rate (BER).

Narrowband

Transceiver

Power-line communication

10.1109/icce-berlin.2014.7034245

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Citations (4)