Zobrazeno 1 - 10
of 236
pro vyhledávání: '"Theodoros A. Tsiftsis"'
Publikováno v:
IEEE Open Journal of the Communications Society, Vol 5, Pp 3196-3211 (2024)
In the rapidly evolving domain of intelligent vehicular systems, reliable and instantaneous communication is paramount. This paper delves into the robustness of an ultra-reliable low-latency communication (URLLC)-enabled full-duplex cell-free massive
Externí odkaz:
https://doaj.org/article/4ad48b0163904b65bcdc3add0a5368a7
Autor:
Rugui Yao, Yongsong Yu, Peng Wang, Ye Fan, Xudong Li, Xiaoya Zuo, Nan Qi, Nikolaos I. Miridakis, Theodoros A. Tsiftsis
Publikováno v:
IET Communications, Vol 17, Iss 14, Pp 1665-1682 (2023)
Abstract In this paper, a two‐way relay‐aided cognitive satellite terrestrial network (TR‐CSTN) model is proposed, where primary users are located at the edge of the base station. In the TR‐CSTN, one of satellite terminal users (STUs) is sele
Externí odkaz:
https://doaj.org/article/3a1f8874035b45ac9ec06715c34f5328
Publikováno v:
Digital Communications and Networks, Vol 9, Iss 3, Pp 655-666 (2023)
Intelligent reflecting surface (IRS) has been widely regarded as a promising technology for configuring wireless propagation environments. In this paper, we utilize IRS to assist transmission of a secondary user (SU) in a cognitive radio-inspired rat
Externí odkaz:
https://doaj.org/article/582c434b0957471ca03a26b9e961881c
Publikováno v:
IEEE Open Journal of the Communications Society, Vol 4, Pp 253-268 (2023)
In this paper, we analyze the outage performance of a rate-splitting multiple access (RSMA)-aided semi-grant-free (SGF) transmission system, in which a grant-based user (GBU) and multiple grant-free users (GFUs) access the base station by sharing the
Externí odkaz:
https://doaj.org/article/94277e6ce78c420fa1df2b4ce13cc821
Publikováno v:
IEEE Open Journal of the Communications Society, Vol 3, Pp 1672-1687 (2022)
As massive ground users access wireless networks with limited available spectrum, coexisting users that share the same spectrum band severely interfere with each other. Moreover, communication pairs without direct communication links may suffer from
Externí odkaz:
https://doaj.org/article/9cbaf5cbbeb64c908a57c330af2b163b
Publikováno v:
ETRI Journal, Vol 43, Iss 3, Pp 436-446 (2021)
In this paper, we propose an energy‐efficient unmanned aerial vehicle (UAV) relaying network. In this network, the channels between UAVs and ground transceivers are model‐free. A UAV acting as a flying relay explores better channels to assist in
Externí odkaz:
https://doaj.org/article/793f0bd6722f47ed89b84e907e790be6
Publikováno v:
IEEE Access, Vol 8, Pp 74349-74358 (2020)
In this paper, an energy-efficient full-duplex (FD) unmanned aerial vehicle (UAV) relaying network is proposed, where UAV acts as a mobile relay and assists information exchange between two transceivers. Specifically, the load-carry-and-delivery sche
Externí odkaz:
https://doaj.org/article/39d629f6fbe74c4ebf7af4cf544f3964
Publikováno v:
IEEE Access, Vol 8, Pp 95442-95456 (2020)
In this paper, a new type of quadrature phase shift keying (QPSK) modulation, named as special QPSK (SQPSK), is proposed and optimized. For SQPSK, the quadrant of the symbol is determined by the bits in information sequence according to QPSK constell
Externí odkaz:
https://doaj.org/article/0d07432163dc46a08e285432a2b9ffd6
Publikováno v:
IEEE Access, Vol 7, Pp 13927-13938 (2019)
The impact of transceiver hardware impairments on the accuracy of spectrum sensing cannot be ignored in low-cost and high data rate cognitive radio systems. Nevertheless, ideal hardware for spectrum sensing is widely assumed in the technical literatu
Externí odkaz:
https://doaj.org/article/72a5b6cb05b04c0bbfe5e312889aa2f7
Autor:
Hang Wu, Yulong Zou, Weifeng Cao, Zhong Chen, Theodoros A. Tsiftsis, Manav R. Bhatnagar, Rodrigo C. De Lamare
Publikováno v:
IEEE Access, Vol 7, Pp 35103-35112 (2019)
The hardware impairments of transceiver nodes that generate signal distortions degrade the reliability performance of communication systems. This paper investigates the impact of hardware imperfections on the outage performance of hybrid satellite-te
Externí odkaz:
https://doaj.org/article/83145f03d39f49feb22f2cfa97a7dfd5