Zobrazeno 1 - 10
of 416
pro vyhledávání: '"Phase rotation"'
Publikováno v:
IEEE Access, Vol 11, Pp 48113-48122 (2023)
For a wide range of service requirements, the 5G-NR offers significant flexibility based on OFDM with numerous numerologies. However, OFDM is recognized to have a significant disadvantage due to a high PAPR. On the other hand, the PAPR reduction for
Externí odkaz:
https://doaj.org/article/a2f31ed7c45643f195faf548ffb5e96b
Publikováno v:
IEEE Access, Vol 11, Pp 24794-24807 (2023)
In this study, a cooperative communication system that employs multiple decode-and-forward relay nodes (RNs), in which the associated/active RNs perform phase rotation of the regenerated signals before retransmitting them to a destination node (DN),
Externí odkaz:
https://doaj.org/article/de0505d749e34c9cbd3366b9474f22bc
Publikováno v:
IEEE Open Journal of the Communications Society, Vol 2, Pp 1123-1143 (2021)
In this article, several extensions to an alternating space-time (ST) code (STC) physical layer security (PLS) scheme from the literature are proposed. These contributions include alternative orthogonal STCs as well as non-orthogonal and spatially-mu
Externí odkaz:
https://doaj.org/article/dff9bee7aed743618fe84a73be3fcce7
Publikováno v:
IEEE Access, Vol 9, Pp 148302-148314 (2021)
This paper presents a complete hybrid numerical methodology for the efficient design and optimization of large-scale Transmit-Array (TA) antennas for modern telecommunication applications. There are four main components to the proposed work and metho
Externí odkaz:
https://doaj.org/article/75ed3c2442b9454ebe2a064210bcf8b3
Publikováno v:
IEEE Photonics Journal, Vol 12, Iss 2, Pp 1-12 (2020)
Conventional fast Fourier transform based frequency offset estimation (FFTFOE) algorithm is suitable for QPSK and 8/16/64QAM signals. However, due to the nonrectangular distribution of constellation points, the conventional FFT-FOE is not suitable fo
Externí odkaz:
https://doaj.org/article/dcd3b42c1ced43198c9fdcfec2e179ef
Akademický článek
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Publikováno v:
IEEE Access, Vol 6, Pp 73724-73732 (2018)
In this paper, we investigate a phase cancellation problem that occurs in tag-to-tag communication systems. These are the systems wherein several tags communicate with each other by backscattering an external constant wave signal. A transmitting tag
Externí odkaz:
https://doaj.org/article/3242db542bde4a54a9decf826967c2d2
Akademický článek
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Autor:
Zahraa Ali Jawad
Publikováno v:
Journal of Engineering, Vol 25, Iss 5 (2019)
In this paper, the computational complexity will be reduced using a revised version of the selected mapping (SLM) algorithm. Where a partial SLM is achieved to reduce the mathematical operations around 50%. Although the peak to average power ratio (P
Externí odkaz:
https://doaj.org/article/17dcebbe09864f7c92c3ae1d9f75abdc
Publikováno v:
The Journal of Engineering (2019)
In a large-scale power system, electromagnetic transient simulation is facing the contradiction between simulation speed and simulation accuracy, so the electromagnetic transient models of the components in the power system have been continually bein
Externí odkaz:
https://doaj.org/article/a9a5d4f1ebf14be7b97dcd8a049c7be1