公开(公告)号：US20200343970A1

公开(公告)日：2020-10-29

申请号：US16723448

申请日：2019-12-20

Applicant: Electronics and Telecommunications Research Institute

Inventor： Pansoo KIM ,  Deock Gil OH ,  Joon Gyu RYU

IPC: H04B7/204 ,  H04B7/185

Abstract: Disclosed is a communication method of a satellite and a ground station and apparatuses performing the same. The communication method includes transmitting a plurality of frames to a satellite based on a beam hopping time plan (BHTP) of the satellite and a ground station and synchronizing the BHTP based on an index of a frame received through a beam switching window (BSW) allocated to the ground station among the plurality of frames, and an identification value indicating at least one sub-frame included in the frame.

公开(公告)号：US20190260626A1

公开(公告)日：2019-08-22

申请号：US16017810

申请日：2018-06-25

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Pansoo KIM ,  Deock Gil OH

IPC: H04L27/26

Abstract: Disclosed is a demodulation method to be used by an apparatus receiving a data packet transmitted in wired and wireless communications to recover data from a received signal. The apparatus receiving the data packet may recover or synchronize a symbol timing that is used to recover the data, and a demodulator included in the apparatus receiving the data packet may determine the symbol timing through different methods based on a length of a burst included in the data packet.

公开(公告)号：US20210409142A1

公开(公告)日：2021-12-30

申请号：US17361575

申请日：2021-06-29

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Pansoo KIM ,  Soo Yeob JUNG ,  Joon Gyu RYU

IPC: H04J13/00 ,  H04L5/00 ,  H04B17/327 ,  H04W72/04 ,  H04L1/00 ,  H04L27/00

Abstract: An ultra-low power data transmission method and apparatus are disclosed. An ultra-low power data transmission method to be performed by a user terminal of an ultra-low power data transmission system includes performing channel coding on a payload included in a transmission packet; interleaving a payload obtained through the channel coding, spreading the interleaved payload using a gold code and an orthogonal variable spreading factor (OVSF), combining a synchronization header spread using the gold code and the OVSF with the spread payload, and modulating a transmission packet in which the payload and the synchronization header are combined.

公开(公告)号：US20200052778A1

公开(公告)日：2020-02-13

申请号：US16181149

申请日：2018-11-05

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jonggyu OH ,  Pansoo KIM ,  Deock Gil OH ,  Joon Gyu RYU ,  Soo Yeob JUNG

IPC: H04B7/185 ,  H04B7/155 ,  H04W72/04

Abstract: Disclosed is a communication method performed between a satellite and a ground station and apparatuses performing the communication method. The communication method includes transmitting a plurality of frames based on a beam allocation time schedule (BATS) between a satellite and a ground station, and synchronizing the BATS based on a reception time and a detection time of one or more frames among the plurality of frames to be received through a beam open window (BOW) allocated to the ground station.

公开(公告)号：US20170279485A1

公开(公告)日：2017-09-28

申请号：US15453666

申请日：2017-03-08

Applicant: Electronics and Telecommunications Research Institute

Inventor： Pansoo KIM ,  Deock Gil OH ,  Xavier GIRAUD

IPC: H04B1/707

CPC classification number: H04B1/707 ,  H04B2001/70724

Abstract: A signal processing method, and a transmitter and a receiver are disclosed. The signal processing method may include converting a transmission signal to a non-periodic sequence type transmission signal using periodic sequences and transmitting the non-periodic sequence type transmission signal to the receiver, in which the receiver may detect a burst from the received non-periodic sequence type transmission signal.