Výsledky vyhledávání - "Anissa Mokraoui"

Disparities selection controlled by the compensated image quality for a given bitrate

Autor: Zied Lachiri, Imen Kadri, Gabriel Dauphin, Anissa Mokraoui

Publikováno v: Signal, Image and Video Processing. 14:1143-1151

A stereoscopic image consists of two views rendering a depth sense. Indeed each eye is constrained to look at one view, and the small objects displacements across the two views are interpreted as an indication of depth. These displacements are exploi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e3f3c2025465aa2a12509b8fd260498d
https://doi.org/10.1007/s11760-020-01643-1

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Semi‐blind MIMO‐OFDM channel estimation using expectation maximisation like techniques

Autor: Adel Belouchrani, Abdelhamid Ladaycia, Karim Abed-Meraim, Anissa Mokraoui

Publikováno v: IET Communications. 13:3452-3462

This study deals with semi-blind (SB) channel estimation of multiple-input multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) system using maximum likelihood (ML) technique. For the ML cost optimisation function, new expectation m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c574fa80c6924bef7f3d09b6afb847d5
https://doi.org/10.1049/iet-com.2019.0583

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CRB‐based performance analysis of semi‐blind channel estimation for massive MIMO‐OFDM systems with pilot contamination

Autor: Ouahbi Rekik, Abdelhamid Ladaycia, Karim Abed-Meraim, Anissa Mokraoui

Publikováno v: IET Communications. 13:3479-3488

Channel estimation, which is a key task in massive multiple-input multiple-output orthogonal-frequency division-multiplexing systems (MIMO-OFDM), is severely affected by the problem of pilot contamination during the uplink transmission. Thus, the aim

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0eb3361b9f50568d09ecef21b48f3ae1
https://doi.org/10.1049/iet-com.2019.0432

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Contrast enhancement and details preservation of tone mapped high dynamic range images

Autor: Basarab Matei, Anissa Mokraoui, Ba Chien Thai

Publikováno v: Journal of Visual Communication and Image Representation. 58:589-599

This paper proposes a Tone Mapping (TM) approach converting a High Dynamic Range (HDR) image into a Low Dynamic Range (LDR) image while preserving as much information of the HDR image as possible to ensure a good LDR image visual quality. This approa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::257c737498452eda005d6b51536b42fc
https://doi.org/10.1016/j.jvcir.2018.12.024

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Maximum Likelihood based Identification for Nonlinear Multichannel Communications Systems

Autor: Nguyen Linh Trung, Karim Abed-Meraim, Anissa Mokraoui, Mohamed Nait-Meziane, Ouahbi Rekik

Publikováno v: Digital Signal Processing
Digital Signal Processing, Elsevier, 2021

Nonlinear distortions are important issues in many communications systems. Therefore, this paper deals with the blind and semi-blind identification of nonlinear SIMO/MIMO channels. Quadratic and cubic nonlinearities are considered for the system mode

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fa3568b52469efcb82b768b784f9fd88
https://hal.archives-ouvertes.fr/hal-03337919

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Adaptively Regularized Kernel-Based Fuzzy C-Means Clustering Algorithm Using Particle Swarm Optimization for Medical Image Segmentation

Autor: Ibtissem Cherfa, Karim Mokrani, Anissa Mokraoui, Abdenour Mekhmoukh

Publikováno v: SPA

This paper is concerned with Magnetic Resonance (MR) brain image segmentation using Adaptively Regularized Kernel-Based Fuzzy C-Means (ARKFCM) clustering algorithm. However this algorithm is sensitive to the random initialization of the clusters’ c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::32f468edc8064c264f0aabee65de40d4
https://doi.org/10.23919/spa50552.2020.9241242

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A Study of QoE-Aware Adaptation Mechanism for DASH Video Streaming based on Objective Visual Quality Assessment

Autor: Anissa Mokraoui, Ken Chen, Mustafa Othman

Publikováno v: SPA

Dynamic Adaptive Streaming over HTTP (DASH) is a largely used video streaming technique. One key point is its adaptation mechanism which resides at the client’s side. This allows various context-aware adaptation strategies in order to optimize the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e5ef886ce93e1b52fe22fdaeadb0ec35
https://doi.org/10.23919/spa50552.2020.9241250

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Multi-Modulus based Semi-Blind Source Separation for MIMO-OFDM Communications Systems

Autor: Ouahbi Rekik, Anissa Mokraoui, Karim Abed-Meraim

Publikováno v: SAM
IEEE
IEEE, 2020, Virtual conference, France

This paper presents an efficient Semi-Blind (SB) approach for demixing multi-user mixtures, in a Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) communications system. A weighted hybrid cost function is introduce

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed397a04922835e9b6eedb4e9c0a4218
https://doi.org/10.1109/sam48682.2020.9104315

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