Zobrazeno 1 - 10
of 79
pro vyhledávání: '"Rafik Zayani"'
Autor:
Asma Mabrouk, Rafik Zayani
Publikováno v:
IEEE Access, Vol 11, Pp 105314-105329 (2023)
This paper focuses on investigating uplink (UL) data transmission in cell-free massive MIMO based on orthogonal frequency division multiplexing (CF-mMIMO-OFDM) systems, taking into account the effects of hardware impairments (HWIs). Specifically, the
Externí odkaz:
https://doaj.org/article/800d767de3c44bd691a3f39aac663b61
Publikováno v:
IEEE Access, Vol 10, Pp 68482-68490 (2022)
This paper introduces a new approach to providing secure physical-layer massive multiple-input multiple-output (MIMO) based communications that can improve the energy efficiency of the system. This is achieved by synthesizing orthogonal artificial no
Externí odkaz:
https://doaj.org/article/1687480a7fc84e299fd265a13f7fca7c
Publikováno v:
IEEE Access, Vol 7, Pp 29441-29452 (2019)
This paper studies the performance of enhanced multicarrier waveforms in the presence of a nonlinear memoryless high power amplifier (HPA). In particular, we focus on the in-band non-linear distortions (NLD) and their effects on symbol-error-rate. Fi
Externí odkaz:
https://doaj.org/article/5323e03fadaf444b88d6fa3a6724d931
Publikováno v:
IEEE Access, Vol 7, Pp 25474-25484 (2019)
We investigate the peak-to-average power ratio (PAPR) reduction problem in orthogonal frequency-division multiplexing-based massive multi-user (MU) multiple-input multiple-output (MIMO) downlink systems. In this paper, we develop a downlink transmiss
Externí odkaz:
https://doaj.org/article/63375823938a481d91aff703b05f621f
Publikováno v:
IEEE Access, Vol 7, Pp 177164-177176 (2019)
The extremely diverse service requirements is an important challenge for the upcoming fifth-generation (5G) wireless communication technologies. Orthogonal frequency division multiplexing (OFDM)-based massive multiple-input multiple-output (MIMO) and
Externí odkaz:
https://doaj.org/article/e6fc34e25c114091ac8000e903816725
Autor:
Rafik Zayani, Hmaied Shaiek, Xinying Cheng, Xiaotian Fu, Christophe Alexandre, Daniel Roviras
Publikováno v:
IEEE Access, Vol 6, Pp 67665-67680 (2018)
This paper details an experimental testbed conceived for studying the capability of new multicarrier waveforms to accommodate 5G requirements. Testbed experiments are done with an implementation of cyclically prefixed orthogonal frequency division mu
Externí odkaz:
https://doaj.org/article/bc8d8c26ab534851beffb1ee40dd3090
Autor:
Yahia Medjahdi, Sylvain Traverso, Robin Gerzaguet, Hmaied Shaiek, Rafik Zayani, David Demmer, Rostom Zakaria, Jean-Baptiste Dore, Mouna Ben Mabrouk, Didier Le Ruyet, Yves Louet, Daniel Roviras
Publikováno v:
IEEE Access, Vol 5, Pp 26556-26581 (2017)
During the past few years, we are witnessing the emergence of 5G and its high-level performance targets. Waveform (WF) design is one of the important aspects for 5G that received considerable attention from the research community in recent years. To
Externí odkaz:
https://doaj.org/article/4d581cf14fc440f1abed61edbd02a13b
Publikováno v:
Sensors, Vol 19, Iss 14, p 3127 (2019)
Currently, indoor localization is among the most challenging issues related to the Internet of Things (IoT). Most of the state-of-the-art indoor localization solutions require a high computational complexity to achieve a satisfying localization accur
Externí odkaz:
https://doaj.org/article/6b62cea4bdcf4c54abef7992f05ab24e
Publikováno v:
Applied Sciences, Vol 9, Iss 12, p 2414 (2019)
In this paper, we propose a high accuracy fingerprint-based localization scheme for the Internet of Things (IoT). The proposed scheme employs mathematical concepts based on sparse representation and matrix completion theories. Specifically, the propo
Externí odkaz:
https://doaj.org/article/9ac63a4f0fbe4e5c9f3c6f93dffe0d66
Publikováno v:
EURASIP Journal on Wireless Communications and Networking, Vol 2008 (2008)
This paper presents adaptive predistortion techniques based on a feed-forward neural network (NN) to linearize power amplifiers such as those used in satellite communications. Indeed, it presents the suitable NN structures which give the best perform
Externí odkaz:
https://doaj.org/article/da15e4c9d8724cf6a21a41b83d39b421