Zobrazeno 1 - 10
of 312
pro vyhledávání: '"Hyuncheol Park"'
Publikováno v:
ICT Express, Vol 10, Iss 4, Pp 798-803 (2024)
In this paper, we propose deep learning-based channel estimation and pilot reduction for mmWave point-to-point multi-input multi-output systems. The proposed scheme consists of a two-step approach where the first step is applying a denoising autoenco
Externí odkaz:
https://doaj.org/article/4c77e58f1c7442dfb4d9c5bc317340e3
Publikováno v:
IEEE Access, Vol 12, Pp 89384-89393 (2024)
Cloud Radio Access Network (C-RAN) refers to the virtualization of base station functionalities by means of cloud computing. With centralized processing at the cloud, the amount of hardware and infrastructure in a network can be reduced and it allows
Externí odkaz:
https://doaj.org/article/4d0ff5c7834b4e7c83aed77c6540c7eb
Publikováno v:
IEEE Photonics Journal, Vol 15, Iss 6, Pp 1-13 (2023)
The unmanned aerial vehicle (UAV)-aided free-space optical/radio frequency (FSO/RF) technique has recently attracted significant attention, which offers new possibilities thanks to its dynamic deployment capability. However, many researchers have not
Externí odkaz:
https://doaj.org/article/06517222e0a943998a51431522d5acd8
Autor:
Pansoo Kim, Hyuncheol Park
Publikováno v:
Sensors, Vol 23, Iss 19, p 8320 (2023)
This paper proposes a robust symbol timing synchronization scheme for return link initial access based on the Digital Video Broadcasting-Return Channel via Satellite 2nd generation (DVB-RCS2) system for the Low Earth Orbit (LEO) satellite channel. In
Externí odkaz:
https://doaj.org/article/e8ac0702978c406cb2228fc6e955417c
Publikováno v:
IEEE Access, Vol 10, Pp 117715-117731 (2022)
NAND flash memory is becoming smaller and denser to have a larger storage capacity as technologies related to fine processes are developed. As a side effect of high-density integration, the memory can be vulnerable to circuit-level noise such as rand
Externí odkaz:
https://doaj.org/article/6200721d560641998ebe08e47331b871
Publikováno v:
ICT Express, Vol 7, Iss 1, Pp 28-35 (2021)
In millimeter wave communication, the beamforming technique with accurate angle information plays a key role to overcome the high path-loss and mitigate the interference. Particularly with multiple mobile stations (MSs), accurate multi-beam tracking
Externí odkaz:
https://doaj.org/article/6a5956fa670549b7a059c79cc19c2b88
Publikováno v:
IEEE Access, Vol 9, Pp 109976-109985 (2021)
In this paper, we study a waveform design based on time-reversal (TR) for multi-user wireless power transfer (WPT) systems in multipath channels. The existing waveforms for WPT using the non-linear energy harvesting (EH) model have been designed in t
Externí odkaz:
https://doaj.org/article/04cdc3f56942402898f5976f9e1839c1
Autor:
Woowan Wang, Hyuncheol Park
Publikováno v:
IEEE Access, Vol 8, Pp 108474-108481 (2020)
For orthogonal frequency division multiplexing (OFDM) systems, the carrier frequency offset (CFO) estimation is required for the frequency synchronization before the data reception. When 1-bit ADCs are employed in OFDM systems, the available informat
Externí odkaz:
https://doaj.org/article/534cb525ecfc468693fb68b514bfe059
Publikováno v:
IEEE Access, Vol 8, Pp 176416-176429 (2020)
To achieve a low error rate of NAND flash memory, reliable reference voltages should be updated based on the accurate knowledge of program/erase (P/E) cycles and retention time, because those severely distort the threshold voltage distribution of mem
Externí odkaz:
https://doaj.org/article/f5a2f8dd2e884a7692071cfef5f64409
Publikováno v:
ICT Express, Vol 5, Iss 1, Pp 60-64 (2019)
In conventional maximum distance separable (MDS) coded caching systems, storage-efficient caching strategy which minimizes unnecessarily redundant data is believed to be optimal. However, the conventional storage efficient caching strategy may not be
Externí odkaz:
https://doaj.org/article/c783f97098844bd8b7f45757a6cff3ab