Zobrazeno 1 - 10
of 29 549
pro vyhledávání: '"Spectral-efficiency"'
Publikováno v:
ICT Express, Vol 10, Iss 6, Pp 1301-1307 (2024)
In the heterogeneous network (HetNet) employing downlink non-orthogonal multiple access (NOMA), we focus on the non-convex optimization problem to optimize the spectral efficiency (SE) while the users satisfy the quality-of-service (QoS) requirement.
Externí odkaz:
https://doaj.org/article/65da6be8fe8d4abea5f072f1566b0e6d
Autor:
Freddy Pesantez Diaz, Claudio Estevez
Publikováno v:
Telecom, Vol 5, Iss 3, Pp 846-891 (2024)
Cell-Free Massive Multiple-Input–Multiple-Output (CF-MIMO) systems have transformed the landscape of wireless communication, offering unparalleled enhancements in Spectral Efficiency and interference mitigation. Nevertheless, the large-scale deploy
Externí odkaz:
https://doaj.org/article/b4353dd1652a4f30a06e02a4a07eb0d0
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-30 (2024)
Abstract Non-orthogonal Multiple Access (NOMA) techniques offer potential enhancements in spectral efficiency for 5G and 6G wireless networks, facilitating broader network access. Central to realizing optimal system performance are factors like joint
Externí odkaz:
https://doaj.org/article/6cc1eda721e146a6919f2d9ff50e788a
Autor:
U. Shyamala Devi, R.K. Mugelan
Publikováno v:
Results in Engineering, Vol 24, Iss , Pp 103468- (2024)
This paper presents a novel approach of integrating an error vector magnitude with hierarchical modulation in which HM dynamically adjusts modulation schemes to optimize spectral efficiency under varying channel conditions. Relay nodes are strategica
Externí odkaz:
https://doaj.org/article/a57bdf547df24386b57673b212419c5c
Autor:
Tong Wang
Publikováno v:
Journal of King Saud University: Computer and Information Sciences, Vol 36, Iss 9, Pp 102225- (2024)
The rapid development of wireless-powered Internet of Things (IoT) networks, supported by multiple unmanned aerial vehicles (UAVs) and full-duplex technologies, has opened new avenues for simultaneous data transmission and energy harvesting. In this
Externí odkaz:
https://doaj.org/article/d84240a482e74113a75fb857463e57ee
Publikováno v:
Guangtongxin yanjiu, Pp 23007501-23007508 (2024)
【Objective】Aiming at the problems of low spectral efficiency and limited system throughput in Optical Quadrature Spatial Modulation (OQSM), a Signed Optical Quadrature Spatial Modulation (SOQSM) scheme is proposed in Free Space Optical Communicat
Externí odkaz:
https://doaj.org/article/53fd668098d14fb18f990ee7ebaf6c82
Autor:
Shahid Ali, Nazhakaiti Yasen, Barno Sayfutdinovna Abdullaeva, Almetwally M. Mostafa, Nouf F. AlQahtani
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-9 (2024)
Abstract Accurate channel state information (CSI) is crucial for optimizing wireless communication systems. In scenarios with varying user-to-base station angles, the angle-dependent coherence time impacts conventional pilot strategies. Due to small
Externí odkaz:
https://doaj.org/article/f03e1f0718194e64aeef2773bb4434ed
Publikováno v:
EURASIP Journal on Advances in Signal Processing, Vol 2024, Iss 1, Pp 1-17 (2024)
Abstract Semantic communication and spectrum sharing are pivotal technologies in addressing the perennial challenge of scarce spectrum resources for the sixth-generation (6G) communication networks. Notably, scant attention has been devoted to invest
Externí odkaz:
https://doaj.org/article/bd6bb9e198884e9bbf9d22e6126cb7d5
Autor:
Raya K. Mohammed, Nasser N. Khamiss
Publikováno v:
Journal of Communications Software and Systems, Vol 20, Iss 2, Pp 165-172 (2024)
Due to the increasing number of users and high data rate requirements for multimedia applications in fifth-generation (5G) and beyond wireless systems, it’s necessary to incorporate spectral efficient techniques to overcome the limited available re
Externí odkaz:
https://doaj.org/article/bba8005decf542c5ba98f07cb90c1239
Publikováno v:
Journal of Communications Software and Systems, Vol 20, Iss 2, Pp 173-185 (2024)
In this paper, an innovative system called grouping frequency-time index modulation-based differential chaos shift keying (GFTIM-DCSK-I) is presented to improve the energy efficiency (EE), spectral efficiency, and data rate of the recently proposed g
Externí odkaz:
https://doaj.org/article/ea0dda33b9dd4583a357ebf9aea59c09