Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Ozlem Tugfe Demir"'
Autor:
Yiming Huo, Xingqin Lin, Boya Di, Hongliang Zhang, Francisco Javier Lorca Hernando, Ahmet Serdar Tan, Shahid Mumtaz, Özlem Tuğfe Demir, Kun Chen-Hu
Publikováno v:
Sensors, Vol 23, Iss 13, p 6062 (2023)
At the dawn of the next-generation wireless systems and networks, massive multiple-input multiple-output (MIMO) in combination with leading-edge technologies, methodologies, and architectures are poised to be a cornerstone technology. Capitalizing on
Externí odkaz:
https://doaj.org/article/79ef25ef9cc94bb6b34788015a875f31
Publikováno v:
IEEE Open Journal of the Communications Society, Vol 3, Pp 574-592 (2022)
Network slicing is a promising technology for realizing the vision of supporting a wide range of services with diverse and heterogeneous service requirements. With network slicing, the network is partitioned into multiple individual dedicated network
Externí odkaz:
https://doaj.org/article/68d42045c19849d384040e497ae90281
Publikováno v:
IEEE Open Journal of the Communications Society, Vol 2, Pp 168-186 (2021)
Cell-free Massive MIMO systems consist of a large number of geographically distributed access points (APs) that serve the users by coherent joint transmission. The spectral efficiency (SE) achieved by each user depends on the power allocation: which
Externí odkaz:
https://doaj.org/article/0355d126ce084bf994891815a4264737
Autor:
Ozlem Tugfe Demir, Emil Bjornson
Publikováno v:
IEEE Open Journal of the Communications Society, Vol 1, Pp 109-124 (2020)
This paper considers the joint impact of non-linear hardware impairments at the base station (BS) and user equipments (UEs) on the uplink performance of single-cell massive MIMO (multiple-input multiple-output) in practical Rician fading environments
Externí odkaz:
https://doaj.org/article/c9de78b28b5841f89a29b0412072d809
Autor:
Ozlem Tugfe Demir, Sai Subramanyam Thoota, Chandra R. Murthy, Pontus Giselsson, Cenk M. Yetis, Christo Kurisummoottil Thomas, Rakesh Mundlamuri, Marios Kountouris, Joerg Widmer, Dolores Garcia Marti, Emil Björnson, Sameera H. Bharadwaja, Nuria Gonzalez-Prelcic, Joan Palacios
Publikováno v:
IMDEA Networks Institute Digital Repository
instname
instname
In this paper, we present and compare three novel model-cum-data-driven channel estimation procedures in a millimeter-wave Multi-Input Multi-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) wireless communication system. The transceive
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2899ae1aaf948549b45bbf97752b008a
https://doi.org/10.52953/oeeg5719
https://doi.org/10.52953/oeeg5719
Autor:
Ozlem Tugfe Demir, Emil Björnson
Publikováno v:
IEEE Transactions on Wireless Communications. 20:1756-1769
This paper considers wireless uplink information and downlink power transfer in cell-free massive multiple-input multiple-output systems. The single-antenna user equipments (UEs) utilize the energy harvested in the downlink to transmit uplink pilot a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::59b5458691b2bb20fe7fed46c6774e05
https://doi.org/10.1109/twc.2020.3036281
https://doi.org/10.1109/twc.2020.3036281
Autor:
Ozlem Tugfe Demir, Emil Björnson
Publikováno v:
IEEE Signal Processing Magazine. 38:131-136
Many of the systems in various signal processing applications are nonlinear due to, for example, hardware impairments, such as nonlinear amplifiers and finite-resolution quantization. The Bussgang decomposition is a popular tool used when analyzing t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e07143f58c8458425c009b5b0856ec9e
https://doi.org/10.1109/msp.2020.3025538
https://doi.org/10.1109/msp.2020.3025538
Publikováno v:
IEEE Transactions on Communications. 68:4277-4292
We consider backward crosstalk in $2\times 2$ transmitters, which is caused by crosstalk from the outputs of the transmitter to the inputs or by the combination of output crosstalk and impedance mismatch. We analyze its impact via feedback networks t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d12e570c6b0f164824ee224fecb25a7c
https://doi.org/10.1109/tcomm.2020.2988927
https://doi.org/10.1109/tcomm.2020.2988927
Previous works on cell-free massive MIMO mostly consider physical-layer and fronthaul transport aspects. How to deploy cell-free massive MIMO functionality in a practical wireless system is an open problem. This paper proposes a new cell-free archite
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::73b2a165f7c97b94228eeea54d0b6e3f
http://arxiv.org/abs/2202.09254
http://arxiv.org/abs/2202.09254
A reconfigurable intelligent surface (RIS) can be used to improve the channel gain between a base station (BS) and user equipment (UE), but only if its $N$ reflecting elements are configured properly. This requires accurate estimation of the cascaded
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f16d2385fcc8deb5685e37b523ea0415