Zobrazeno 1 - 10
of 84
pro vyhledávání: '"S. Mohammad Razavizadeh"'
Publikováno v:
IEEE Open Journal of the Communications Society, Vol 5, Pp 5890-5904 (2024)
In this paper, we explore the problem of utilizing Integrated Access and Backhaul (IAB) technology in Non-Terrestrial Networks (NTN), with a particular focus on aerial access networks. We consider an Uncrewed Aerial Vehicle (UAV)-based wireless netwo
Externí odkaz:
https://doaj.org/article/c30f3c76e1f34fbebaeeb01f25e74ede
Publikováno v:
IEEE Access, Vol 11, Pp 71658-71667 (2023)
One of the major challenges with cell-free (CF) massive multiple-input multiple-output (MIMO) networks is providing backhaul links for a large number of distributed access points (APs). In general, providing fiber optics backhaul for these APs is not
Externí odkaz:
https://doaj.org/article/433d66c8453e453ca3e797010ca7c85d
Publikováno v:
IEEE Access, Vol 10, Pp 38709-38728 (2022)
In this paper, we tackle the problem of optimizing user clustering, power, and resource (time slot or bandwidth) allocation in the downlink of a hybrid non-orthogonal multiple access (NOMA)-orthogonal multiple access (OMA) system. In such a system, u
Externí odkaz:
https://doaj.org/article/68626ae334b04665a8d2cf20ac076ab3
Publikováno v:
IET Communications, Vol 15, Iss 14, Pp 1780-1790 (2021)
Abstract In this paper, the problem of physical layer security in the uplink of millimeter‐wave massive multiple‐input multiple‐output (MIMO) networks is studied and a jamming detection and suppression method is proposed. The proposed method is
Externí odkaz:
https://doaj.org/article/2c7bf95bf8f8478aab58459d0a0be3ec
Publikováno v:
IEEE Access, Vol 9, Pp 102886-102898 (2021)
In this paper, we investigate joint optimization of power allocation factors (PAFs) and decoding order of users in the downlink of a non-orthogonal multiple access (NOMA) system over Nakagami- $m$ fading channels. The objective is to guarantee fairne
Externí odkaz:
https://doaj.org/article/603c43fc07d74d73b72503f5a6e9136d
Publikováno v:
IEEE Open Journal of the Communications Society, Vol 2, Pp 2219-2231 (2021)
Massive multiple-input multiple-output (MaMIMO) and cognitive radio networks (CRNs) are two promising technologies for improving spectral efficiency of next-generation wireless communication networks. In this paper, we investigate the problem of phys
Externí odkaz:
https://doaj.org/article/ae140c791d974261bc6a49925133421e
Publikováno v:
IEEE Access, Vol 8, Pp 72068-72077 (2020)
Frequency division duplex (FDD) massive multiple-input multiple-output (MIMO) systems introduce a large overhead in downlink channel estimation in contrast to the time division duplex (TDD) mode. This overhead results in a considerable spectral effic
Externí odkaz:
https://doaj.org/article/5e384ba58cb04186bf4637d1d9373999
Publikováno v:
IEEE Access, Vol 8, Pp 150514-150526 (2020)
In this article, downlink secure transmission in simultaneous information and power transfer (SWIPT) system enabled with massive multiple-input multiple-output (MIMO) is studied. A base station (BS) with a large number of antennas transmits energy an
Externí odkaz:
https://doaj.org/article/7ea7d5a8c39d48d08730d667cc65a7e5
Publikováno v:
International Journal of Information and Communication Technology Research, Vol 11, Iss 3, Pp 1-8 (2019)
We study the problem of physical layer security in massive multiple-input multiple-output (MaMIMO) cognitive radio networks (CRNs). In particular, we investigate the design of a smart jamming attack on the uplink transmission of a CRN in the presence
Externí odkaz:
https://doaj.org/article/78e758aebbee47979b1103b6b0f0a2ff
Publikováno v:
IEEE Access, Vol 7, Pp 68091-68105 (2019)
In this paper, we study the effect of users' height distribution on the coverage probability of millimeter-wave (mmWave) cellular networks that utilize three-dimensional beamforming (3DBF). The users and base stations (BSs) are equipped with multiple
Externí odkaz:
https://doaj.org/article/832a9d341e5b406fbaac7756a8dbd639