APPLICATION OF FFT TO DETECTION AND CANCELLATION OF IMPULSE NOISE ON A G3 POWER LINE CHANNEL
Auteur(s): MOSINGALETE LUMBU JUDITH, MBUYI MUKENDI EUGENENom de la revue/Journal: JOURNAL AFRICAIN DES SCIENCES
Mois: août
Volume: 2, 2
Numéro: ISSN (online) : 3006-2306 ; ISSN (print) : 3006-3760
Année: 2025
pages: 57-65
Résumé
<p>The electrical network, as a transmission medium, generates impulsive electromagnetic noise due to connected devices. This risks absorbing part of the useful signal and creates impulsive disturbances on the Power Line Communication channel. To solve this problem, this paper proposes the detection of impulsive disturbances produced by the Fast Fourier Transform using an oscilloscope. We performed the simulation on the automated processing software (Matlab) for spectrum analysis. This consisted of loading the electromagnetic noise file, cutting the OFDM (Orthogonal Frequency Division Multiplexing) symbols, processing them and visualizing them as functions of time and the frequency of the impulsive disturbances. We proposed an algorithm that was responsible for detecting the position of the pulse and erasing the time samples where the pulse was detected on Class 2 electrical devices. The implementation of this algorithm provides good performance for impulsive aperiodic noise on the power spectral density of the received signal.</p>