Zobrazeno 1 - 10
of 46
pro vyhledávání: '"Hiroki Iimori"'
Publikováno v:
IEEE Access, Vol 10, Pp 40130-40149 (2022)
We address the trade-off between system throughput and user equipment (UE) fairness in dynamic time division duplex (TDD) cell-free (CF)-massive multiple-input multiple-output (mMIMO) systems, developing to that end a joint access point (AP) access c
Externí odkaz:
https://doaj.org/article/014c5c07d90c429c99963c07b4ecfb2c
Publikováno v:
IEEE Open Journal of the Communications Society, Vol 3, Pp 740-758 (2022)
We consider a cell-free massive MIMO (CF-mMIMO) system in which multiple access points (APs), connected to a common central processing unit (CPU) through unbounded fronthaul, collaboratively serve multiple users in a heterogeneous scenario in which e
Externí odkaz:
https://doaj.org/article/aface21aafb34101884d8bdc41d1fd1f
Autor:
Hiroki Iimori, Giuseppe Thadeu Freitas De Abreu, Takanori Hara, Koji Ishibashi, Razvan-Andrei Stoica, David Gonzalez G., Osvaldo Gonsa
Publikováno v:
IEEE Open Journal of the Communications Society, Vol 2, Pp 512-533 (2021)
We a framework for the design of low-complexity and high-performance receivers for multidimensional overloaded non-orthogonal multiple access (NOMA) systems. The framework is built upon a novel compressed sensing (CS) regularized maximum likelihood (
Externí odkaz:
https://doaj.org/article/c82581ddf70e4c76b48ea347300cb09a
Autor:
Hiroki Iimori, Giuseppe Thadeu Freitas De Abreu, Omid Taghizadeh, Razvan-Andrei Stoica, Takanori Hara, Koji Ishibashi
Publikováno v:
IEEE Access, Vol 9, Pp 74471-74487 (2021)
In this study, we consider the downlink beamforming problem in millimeter wave (mmWave) systems subjected to both path blockages and imperfect channel state information (CSI), and propose a new robust hybrid sum-outage minimizing design as a solution
Externí odkaz:
https://doaj.org/article/dbca7976dcec4555a0873c9648597684
Autor:
Kengo Ando, Hiroki Iimori, Takumi Takahashi, Koji Ishibashi, Giuseppe Thadeu Freitas De Abreu
Publikováno v:
IEEE Access, Vol 9, Pp 102770-102782 (2021)
We consider the problem of uplink signal detection in scalable cell-free mMIMO (CF-mMIMO) systems subject to limited fronthaul link capacity and highly correlated channel conditions. Unlike centralized MIMO systems, in which all receive antennas are
Externí odkaz:
https://doaj.org/article/00aca99492cf49098fd352b00ed7b541
Publikováno v:
IEEE Open Journal of the Communications Society, Vol 2, Pp 1249-1266 (2021)
Full-duplex amplify-and-forward multiple-input multiple-output relaying has been the focus of several recent studies, due to the potential for achieving a higher spectral efficiency and lower latency, together with inherent processing simplicity. How
Externí odkaz:
https://doaj.org/article/ca6a5d53b6a74cd8bdf63cf00291e97e
Publikováno v:
IEEE Access, Vol 8, Pp 219934-219945 (2020)
We consider the uplink of an energy harvesting (EH) wireless sensor network (WSN) where N single-antenna sensors communicate with a common fusion center (FC) with the aim of cooperatively minimizing the overall average age of information (AoI). Speci
Externí odkaz:
https://doaj.org/article/c7cbb54173824e1688abbc00260e32d4
Publikováno v:
IEEE Access, Vol 7, Pp 150757-150774 (2019)
We consider the estimation of millimeter wave (mmWave) channel gains following the now well-established approach of sparse signal processing. Within that context, we offer two major contributions. The first is a complete frame-theoretical treatment o
Externí odkaz:
https://doaj.org/article/f6595efd55b9438da5bc5345a9a6648d
Publikováno v:
IEEE Transactions on Vehicular Technology. :1-14
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23246434dc6d65f8bc2050d71c64e9db
https://doi.org/10.1109/tvt.2023.3244625
https://doi.org/10.1109/tvt.2023.3244625
Autor:
Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, Hiroki Iimori, David Gonzalez G., Osvaldo Gonsa
Publikováno v:
IEEE Transactions on Wireless Communications. 21:9293-9311
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34643f41cb5de9d6d47c60e645675779
https://doi.org/10.1109/twc.2022.3175579
https://doi.org/10.1109/twc.2022.3175579