Zobrazeno 1 - 10
of 987
pro vyhledávání: '"Multipath channel"'
Publikováno v:
Tongxin xuebao, Vol 45, Pp 14-25 (2024)
Considering the lack of a general multi-carrier signal dataset in urban multipath channels, and the challenge of recognizing the modulation types of distorted signals at low signal-to-noise ratio (SNR), a differentiable architecture search-based (DAR
Externí odkaz:
https://doaj.org/article/b94317970cfc4419b468a5c279d2328c
Publikováno v:
IEEE Access, Vol 12, Pp 7952-7965 (2024)
OFDM is a powerful modulation technique that efficiently transmits high-speed digital data over frequency-selective fading channels. It divides the signal into multiple subcarriers, each experiencing flat fading, and compensates for independent noise
Externí odkaz:
https://doaj.org/article/11bfa3c069a542f1abe5bceacc6df685
Publikováno v:
Applied Sciences, Vol 14, Iss 19, p 8797 (2024)
In wireless communication and radar systems, long-distance signal transmission poses significant challenges that affect overall system performance. In this paper, we propose an innovative bistatic radar cross section (RCS) testing system designed to
Externí odkaz:
https://doaj.org/article/743d05271ec04f8ebc9135e687855133
Publikováno v:
Tongxin xuebao, Vol 44, Pp 104-114 (2023)
For orthogonal frequency division multiplexing (OFDM) systems, an adaptive pilot design algorithm based on deep reinforcement learning was proposed.The pilot design problem was formulated as a Markov decision process, where the index of pilot positio
Externí odkaz:
https://doaj.org/article/e83f609bd9e1416c957730ac99482883
Publikováno v:
IEEE Open Journal of the Communications Society, Vol 4, Pp 810-822 (2023)
Terahertz (THz) communications systems have been considered as one of the enabling technologies for beyond 5G mobile networks, with the ability to offer higher capacity and lower latency compared to the current systems. In this paper, we develop a ne
Externí odkaz:
https://doaj.org/article/f6ec5b73cca94b21a052e34840aad4bd
Publikováno v:
Физика волновых процессов и радиотехнические системы, Vol 25, Iss 4, Pp 39-45 (2022)
A method for increasing performance of OFDM systems in multipath channels is proposed. The proposed method uses Kalman filter based channel estimator with block type pilot structure. Performance of the proposed method has been demonstrated for GSCM/E
Externí odkaz:
https://doaj.org/article/0e83f0583d154c438e845055637dc0bb
Publikováno v:
IEEE Access, Vol 10, Pp 67383-67395 (2022)
In this study, an efficient model of the channel matrix is developed for a $2\times $ 2 wireless body area network multiple input output (WBAN-MIMO) system based on deep learning algorithms. The model is composed of three deep-learning algorithms. Mo
Externí odkaz:
https://doaj.org/article/e92b2ad9ae974953824c047c6854c982
Akademický článek
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Akademický článek
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Publikováno v:
IEEE Access, Vol 8, Pp 133622-133632 (2020)
Orthogonal Frequency Division Multiplexing (OFDM), as the core technology in mobile communications, is a multi-carrier modulation technology with high frequency spectrum utilization, which has strong anti-multipath interference and anti-fading abilit
Externí odkaz:
https://doaj.org/article/7c6945e18a214bcaaccc82800afc4026