Zobrazeno 1 - 10
of 844
pro vyhledávání: '"diversity order"'
Publikováno v:
IEEE Photonics Journal, Vol 16, Iss 4, Pp 1-14 (2024)
With the in-depth exploration of the ocean, the Internet of Underwater Things (IoUT) technology has attracted increasing attention. Underwater wireless optical communication (UWOC) provides the possibility of massive data transmission for IoUT. The u
Externí odkaz:
https://doaj.org/article/4560a98908294103a0e7b46fbeec71ab
Publikováno v:
ETRI Journal, Vol 45, Iss 6, Pp 952-962 (2023)
In this study, a space-time transmission scheme is proposed to tackle the limitations of channel estimation with orthogonal pilot information in colocated multiple-input multiple-output systems with several transmitting and receiving antennas. Channe
Externí odkaz:
https://doaj.org/article/0484f7be1abb43c2bd446cdf5e72ea90
Autor:
Seong Ho Chae, Hoojin Lee
Publikováno v:
ICT Express, Vol 9, Iss 4, Pp 714-721 (2023)
This paper studies physical layer security for Alamouti space–time block code (STBC) with joint maximum likelihood (JML) or zero forcing (ZF) detection techniques particularly over multi-input single-output (MISO) wiretap time-selective Rayleigh fa
Externí odkaz:
https://doaj.org/article/68894025d16847e9b2942d29ff5b14b0
Publikováno v:
IEEE Open Journal of the Communications Society, Vol 4, Pp 2578-2595 (2023)
This paper proposes a novel approach that utilizes differential encoding to overcome the channel estimation problem in communication systems with low-resolution quantization receivers. For differentially encoded data, we derive the maximum likelihood
Externí odkaz:
https://doaj.org/article/32cf3943d5964b5c8858b2c8e7b10f9b
Publikováno v:
IEEE Open Journal of Signal Processing, Vol 4, Pp 21-30 (2023)
Quantized constant envelope (QCE) transmission is a popular and effective technique to reduce the hardware cost and improve the power efficiency of 5G and beyond systems equipped with large antenna arrays. It has been widely observed that the number
Externí odkaz:
https://doaj.org/article/e74c620202fb4de88f4b018cf24aa4cd
Autor:
Ashraf Al-Rimawi, Arafat Al-Dweik
Publikováno v:
IEEE Open Journal of the Communications Society, Vol 3, Pp 2314-2328 (2022)
In reconfigurable intelligent surface (RIS)-assisted communications, the signal-to-noise ratio (SNR) is improved by optimizing the reflecting elements’ phases to make the reflected signals add coherently at the receiver. Nevertheless, the RIS canno
Externí odkaz:
https://doaj.org/article/a6de7c09cd924be792381b73caff9fcc
Publikováno v:
IEEE Open Journal of the Communications Society, Vol 3, Pp 593-607 (2022)
In this paper, we develop a unified theoretical framework for analyzing the outage performance of reconfigurable intelligent surfaces (RISs)-assisted communication systems over generalized fading channels and in the presence of phase noise. Fox’s H
Externí odkaz:
https://doaj.org/article/6842c7f7c69d400dbb50826ad04d831e
Akademický článek
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Publikováno v:
IEEE Open Journal of the Communications Society, Vol 2, Pp 2660-2679 (2021)
This paper investigates the communication reliability for single-input-multiple-output wireless systems with low-resolution phase quantizers. First, the maximum-likelihood detector with $n$ -bit phase quantization is derived when there are $N$ antenn
Externí odkaz:
https://doaj.org/article/13daa1392aed442ab2ce7403262db7c3
Publikováno v:
IEEE Open Journal of the Communications Society, Vol 1, Pp 1798-1807 (2020)
Non-orthogonal multiple access (NOMA) was recently regarded as a potential technique for next generation wireless networks. Recent works on relay selection for cooperative NOMA systems have mainly addressed the best relay selection to forward its rec
Externí odkaz:
https://doaj.org/article/0cc7f06fb08643ab8f55dcdae487976c