公开(公告)号：US09083379B2

公开(公告)日：2015-07-14

申请号：US14301753

申请日：2014-06-11

Applicant: Electronics and Telecommunications Research Institute

Inventor： Soo Yeob Jung ,  Pan Soo Kim ,  Joon Gyu Ryu ,  Deock Gil Oh

IPC: H03M1/66

CPC classification number: H03M1/662 ,  H03M1/0624 ,  H03M1/66

Abstract: Provided is a system and method for synchronization between digital-to-analog converters (DAC) for high speed signal processing. A synchronization method of a multi-DAC apparatus may include: inputting a clock to a multiplexer (MUX) DAC; dividing the clock into a first clock and a second clock; transferring a phase difference between the first clock and the second clock to a D flip-flop; and synchronizing the first clock and the second clock by processing the phase difference.

Abstract translation: 提供了用于高速信号处理的数模转换器（DAC）之间的同步的系统和方法。 多DAC装置的同步方法可以包括：将时钟输入到多路复用器（MUX）DAC; 将时钟分为第一时钟和第二时钟; 将第一时钟和第二时钟之间的相位差传送到D触发器; 以及通过处理所述相位差来同步所述第一时钟和所述第二时钟。

公开(公告)号：US11870550B2

公开(公告)日：2024-01-09

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 ,  H04L1/00 ,  H04L27/00 ,  H04W72/23 ,  H04B17/318

CPC classification number: H04J13/0051 ,  H04B17/318 ,  H04B17/327 ,  H04J13/0044 ,  H04L1/0063 ,  H04L1/0071 ,  H04L5/0048 ,  H04L27/0014 ,  H04W72/23 ,  H04L2027/0065

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：US11496348B2

公开(公告)日：2022-11-08

申请号：US17494464

申请日：2021-10-05

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Soo Yeob Jung ,  Pan Soo Kim ,  Joon Gyu Ryu ,  Gyeong Rae Im ,  Dong Hyun Jung

IPC: H04L27/26

Abstract: A method for receiving a wireless signal, performed by a first communication node, may comprise: storing a wireless signal received by the first communication node as samples in a buffer; performing partial correlation operations on the stored samples by a plurality of partial correlators; performing a first FFT operation on results of the partial correlation operations; performing a cumulative product operation on results of the first FFT operation; performing a second FFT operation based on a result of the cumulative product operation; and performing synchronization estimation based on the results of the first FFT operation and a result of the second FFT operation.

公开(公告)号：US20220141073A1

公开(公告)日：2022-05-05

申请号：US17494464

申请日：2021-10-05

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Soo Yeob Jung ,  Pan Soo Kim ,  Joon Gyu Ryu ,  Gyeong Rae Im ,  Dong Hyun Jung

IPC: H04L27/26

Abstract: A method for receiving a wireless signal, performed by a first communication node, may comprise: storing a wireless signal received by the first communication node as samples in a buffer; performing partial correlation operations on the stored samples by a plurality of partial correlators; performing a first FFT operation on results of the partial correlation operations; performing a cumulative product operation on results of the first FFT operation; performing a second FFT operation based on a result of the cumulative product operation; and performing synchronization estimation based on the results of the first FFT operation and a result of the second FFT operation.

公开(公告)号：US10911133B2

公开(公告)日：2021-02-02

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 ,  H04B7/212 ,  H04W72/04 ,  H04W84/06 ,  H04B7/155 ,  H04W56/00

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：US10057869B2

公开(公告)日：2018-08-21

申请号：US15815259

申请日：2017-11-16

Applicant: Electronics and Telecommunications Research Institute

Inventor： Joon Gyu Ryu ,  Soo Yeob Jung ,  Deock Gil Oh ,  Jonggyu Oh

IPC: H04B7/19 ,  H04W56/00 ,  H04W84/06

CPC classification number: H04W56/004 ,  H04W84/06

Abstract: Disclosed is a network synchronization apparatus and method of a time division multiple access (TDMA)-based mesh network satellite communication system, the network synchronization method of a terminal in a satellite communication system including receiving timing error information from a central station, generating a mesh superframe start time (SST′) by reversing a sign of the timing error information, and receiving traffic information transmitted by a transmission terminal using the mesh SST′.