Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Adao Silva"'
Publikováno v:
IEEE Access, Vol 12, Pp 33473-33485 (2024)
The demand for ultra-reliable low-latency communications (URLLC) has led to the adoption of grant-free (GF) access techniques by the 5G NR, with the goal of reducing uplink access time. When GF access is employed, the base station (BS) preallocates m
Externí odkaz:
https://doaj.org/article/243c92be14cd49d4a6e314e11f011357
Publikováno v:
IEEE Access, Vol 11, Pp 110208-110220 (2023)
The intelligent reflecting surface (IRS) has emerged as a promising solution to enhance the quality of radio transmission by allowing flexible control over the direction of reflection and phase shift of electromagnetic waves. In this study, we presen
Externí odkaz:
https://doaj.org/article/7ae59df01c284ac99b769c7e4893b3ee
Autor:
Chi-Bao Le, Dinh-Thuan Do, Adao Silva, Wali Ullah Khan, Waqas Khalid, Heejung Yu, Nhan Duc Nguyen
Publikováno v:
IEEE Access, Vol 10, Pp 7504-7519 (2022)
To develop emerging transmission techniques for potential applications of Internet of Things (IoT), the system performance analysis of a cognitive radio (CR)-enabled ambient backscatter (AmBC) system will be studied in this paper with functionality o
Externí odkaz:
https://doaj.org/article/b21dadc63f1c4aef9128a7df60776ef9
Publikováno v:
IEEE Access, Vol 9, Pp 92263-92275 (2021)
This paper considers a two-user downlink transmission in reconfigurable intelligent surface (RIS)-aided network over fading channels. Particularly, by employing user grouping and fixed power allocation scheme to enable non-orthogonal multiple access
Externí odkaz:
https://doaj.org/article/2cbb56e80e1c4ac4b4e3232519a99453
Publikováno v:
IEEE Access, Vol 9, Pp 102378-102386 (2021)
The high Doppler effects in satellite communications make the equivalent channels fast varying, which leads to channel estimation difficulties and the need for high channel estimation overheads. In this paper we propose a state-space approach for tra
Externí odkaz:
https://doaj.org/article/a1f168162e54466e8aad2cc243fdf702
Publikováno v:
IEEE Access, Vol 8, Pp 55158-55169 (2020)
Our aim with this paper is to present a solution suitable for vehicle-to-everything (V2X) communications, particularly, when employing single-carrier modulations combined with frequency-domain equalization (SC-FDE). In fact, we consider the V2X chann
Externí odkaz:
https://doaj.org/article/3fbb8f8ac91346db9c01b60185b44839
Publikováno v:
IEEE Access, Vol 7, Pp 79017-79029 (2019)
This paper proposes a hybrid multi-user equalizer for the uplink of broadband millimeter-wave massive multiple input/multiple output (MIMO) systems with dynamic subarray antennas. Hybrid subconnected architectures are more suitable for practical appl
Externí odkaz:
https://doaj.org/article/adf9da2dbdc24c83991d4d06c262a623
Publikováno v:
IEEE Access, Vol 7, Pp 172277-172289 (2019)
To fulfill 5th Generation (5G) communication capacity demands, the use of a large number of antennas has been widely investigated, and the array gain and spatial multiplexing that are offered by massive multiple input multiple output (mMIMO) have bee
Externí odkaz:
https://doaj.org/article/28cdfb0b11dd445c9a8aa912c1859282
Publikováno v:
IEEE Access, Vol 6, Pp 31317-31326 (2018)
This paper makes an information theoretical analysis of the intrinsic secrecy level of M-QAM and M-PSK modulation schemes considering the use of equal gain transmission and maximum ratio transmission precoding techniques. In addition to the analysis
Externí odkaz:
https://doaj.org/article/7c79ecfa12644c3db02a8272550388aa
Publikováno v:
IEEE Access, Vol 6, Pp 33410-33420 (2018)
The purpose of this paper is to advance the current state of physical layer security through the design and analysis of a discrete jamming scheme that exploits the reciprocal characteristic of the wireless channel with the aim to create equivocation
Externí odkaz:
https://doaj.org/article/be7ff947106b49c5aa0b59968ae915d9