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Browsing scientific events by Author "BOUGUEZEL Saad"

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    A Low Complexity Parametric DFT and DHT -Based OFDM Transceivers
    (Fourth International Conference on Technological Advances in Electrical Engineering (ICTAEE’23.), 2023-05-24) CHERGUI Laid; BOUGUEZEL Saad
    In this paper, we design new efficient and fast orthogonal frequency division multiplexing (OFDM) transceivers by introducing parametric discrete Fourier and Hartley transforms. We experimentally show that, for a specific value of the parameter and for various signal-to-noise ratios and modulation schemes such as binary phase shift keying (BPSK), quadratic PSK (QPSK), 16 quadratic amplitude modulation (QAM) and 64QAM, the resulting OFDM transceivers based on these transforms achieve performance in terms of bit error rate similar to that of the existing OFDM transceivers. The compatibility of the proposed OFDM modulators with the conventional DFT-based OFDM demodulator is also experimentally verified. In addition, compared to the existing OFDM transceivers, we show that the computational complexity of the proposed OFDM transceivers is significantly reduced.
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    Variable Step Size Pre-Whitening Transform Domain LMS Adaptive Noise Canceller
    (IEEE Xplore, 2019-03-22) CHERGUI Laid; BOUGUEZEL Saad
    In this paper, we propose a novel variable step size pre-whitening transform domain LMS algorithm for adaptive noise cancellation by introducing a new expression for updating the step size using a smoother gradient vector estimated by weighted averaging. The resulting algorithm presents a good tradeoff between performance and computational complexity and significantly outperforms the existing transform domain LMS algorithms in terms of the convergence speed, level of the steady state reached by the excess mean square error (EMSE), the steady state of the EMSE, misadjustment and output SNR.