Zobrazeno 1 - 10
of 364
pro vyhledávání: '"Atilio Gameiro"'
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 129994-130009 (2023)
The ultra-reliable low-latency communications (URLLC) tight latency requirements paired with transmission of small payload packets motivates the development of techniques that reduce or eliminate the need for dynamic scheduling. This justifies the st
Externí odkaz:
https://doaj.org/article/a663a55f42924f6da4f2e68d0f8d9b7e
Publikováno v:
Signals, Vol 3, Iss 2, Pp 359-395 (2022)
MIMO-OFDM is a key technology and a strong candidate for 5G telecommunication systems. In the literature, there is no convenient survey study that rounds up all the necessary points to be investigated concerning such systems. The current deeper revie
Externí odkaz:
https://doaj.org/article/4b526e0016d941c1a2ca6024d3216a85
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 128694-128705 (2019)
In this paper, we propose the usage of Generalized Frequency Division Multiplexing (GFDM), a non-orthogonal multicarrier waveform for radar. We presented a novel method that cancels the effect of interference caused by the non-orthogonality of GFDM w
Externí odkaz:
https://doaj.org/article/3c4b832daee6482793ea0281b342a676
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