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公开(公告)号：US20240162962A1
公开(公告)日：2024-05-16
申请号：US18352124
申请日：2023-07-13
Inventor： Hyuncheol PARK , Hyunwoo NAM
CPC classification number: H04B7/066 , H04B7/04026 , H04L5/0023
Abstract: This disclosure relates to a wideband extremely large array antenna system and an OFDM-based hybrid beamforming for hybrid-field interference control of the same. The wideband extremely large array antenna system for OFDM-based hybrid beamforming of this disclosure may include a transmitter having a plurality of transmit antennas, and a receiver capable of communication with the transmitter and having a plurality of receiving antennas, and the system may be configured to perform a first step for designing a common analog beamforming matrix for all subcarriers between the transmitter and the receiver, and a second step for designing a baseband beamforming matrix for each of the subcarriers.
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公开(公告)号：US20240204843A1
公开(公告)日：2024-06-20
申请号：US18343546
申请日：2023-06-28
Inventor： Hyuncheol PARK , Seunghun LEE
IPC: H04B7/06 , H04B7/0452 , H04B17/336
CPC classification number: H04B7/0626 , H04B7/0452 , H04B17/336
Abstract: Disclosed is a method and system for interference control and hybrid beamforming using multi-agent deep reinforcement learning for multiple users. The disclosed method includes performing multi-agent reinforcement learning using interference and antenna gain information that is expected based on a gain table designed using channel state information (CSI) of all user equipments; searching for an analog beamforming matrix pair corresponding to a link that maximizes antenna gain and minimizes interference between user equipments through multi-agent reinforcement learning; applying a signal-to-leakage plus noise ratio (SLNR) maximization technique that minimizes the interference between the user equipments based on the link; and optimizing transmission (Tx) power for each link based on iterative water-filling.
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3.发明申请公开(公告)号：US20190109629A1
公开(公告)日：2019-04-11
申请号：US16209439
申请日：2018-12-04
Inventor： Hyuncheol PARK , Girim KWON
IPC: H04B7/06 , H04B7/08 , H04B7/0456 , H04B17/336
Abstract: Disclosed is a method and system for digital-analog hybrid beamforming in a millimeter wave downlink channel. A hybrid beamforming method in a downlink channel with respect to at least one user terminal belonging to a transmission apparatus includes receiving feedback information from each of the at least one user terminal; selecting at least one user terminal for transmitting a transmission signal based on the received feedback information; performing digital beamforming with respect to the selected at least one user terminal; and performing analog beamforming with respect to the selected at least one user terminal based on a prestored codebook. The codebook includes a desired number of subsets calculated based on a number of transmit antennas and a number of radio frequency (RF) chains, and each of the subsets includes a number of beamforming vectors corresponding to the number of RF chains.
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4.发明公开公开(公告)号：US20230307948A1
公开(公告)日：2023-09-28
申请号：US17810478
申请日：2022-07-01
Inventor： Hyuncheol PARK , Min Young Hwang
CPC classification number: H02J50/001 , H02J50/40
Abstract: The present disclosure relates to a computer system for maximizing wireless energy harvesting using an intelligent reflection surface and a method thereof. A multi-path channel including a direct channel through which power is directed from an ET apparatus toward an EU apparatus and a reflection channel through which the power is directed from the ET apparatus toward the EU apparatus after being reflected by an IRS apparatus may be implemented. The computer system may be designed to maximize a gain of the multi-path channel in order to maximize the harvested power.
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