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：US20140233680A1

公开(公告)日：2014-08-21

申请号：US14187128

申请日：2014-02-21

Applicant: Electronics and Telecommunications Research Institute

Inventor： Yong Ho LEE ,  Deock Gil OH

IPC: H04L1/00

CPC classification number: H04L1/0055 ,  H03M13/3723 ,  H03M13/3905 ,  H03M13/3972

Abstract: Provided is a maximum a posteriori (MAP) decoder having a low latency and an operation method of the MAP decoder, including a branch metric calculation block to calculate a branch metric based on a received signal, a processor control block to demultiplex a received signal in a certain trellis section, an Extrinsec vector, and the calculated branch metric value, and a processor to calculate a path metric entering each state node in a certain trellis section, compensate for the calculated path metric, and calculate a state metric to be applied to a next trellis section based on the compensated path metric.

Abstract translation: 提供了具有低等待时间的最大后验（MAP）解码器和MAP解码器的操作方法，包括基于接收信号来计算分支度量的分支度量计算块，处理器控制块，用于对接收到的信号进行解复用 特定网格部分，Extrinsec向量和计算的分支度量值，以及处理器，用于计算进入某个格局部分中的每个状态节点的路径度量，补偿所计算的路径度量，并计算要应用于 基于补偿路径度量的下一个网格部分。

公开(公告)号：US20140089766A1

公开(公告)日：2014-03-27

申请号：US14031279

申请日：2013-09-19

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： In Ki LEE ,  Deock Gil OH ,  Ji Won JUNG ,  Min Hyuk KIM

IPC: H03M13/13

CPC classification number: H03M13/13 ,  H03M13/1165 ,  H03M13/611 ,  H03M13/6561

Abstract: Provided is a low density parity check (LDPC) encoding apparatus and method that may store M registers each including N bits, obtain N×M parity bits by performing a partial parallel operation an N×M number of times with respect to the M registers, and mutually invert subsequent N parity bits periodically, based on previous parity bits for each Nth parity bit of the N×M parity bits, respectively.

Abstract translation: 提供了一种低密度奇偶校验（LDPC）编码装置和方法，其可以存储每个包括N比特的M个寄存器，通过相对于M个寄存器执行N×M次次的部分并行操作来获得N×M个奇偶校验位， 并且分别基于N×M个奇偶校验位的每第N个奇偶校验位的先前奇偶校验位周期性地相互反转后续的N个奇偶校验位。

公开(公告)号：US20140056335A1

公开(公告)日：2014-02-27

申请号：US13972288

申请日：2013-08-21

Applicant: Electronics and Telecommunications Research Institute

Inventor： Joon Gyu RYU ,  Do Huy WANG ,  Deock Gil OH

IPC: H04B7/185

CPC classification number: H04B7/18519 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0015

Abstract: An adaptive coding and modulation (ACM) apparatus and method for a forward link in satellite communication is provided. The ACM apparatus may include a receiving unit to receive a signal-to-noise ratio (SNR) of a received signal, a determination unit to determine whether the SNR of the received signal is less than or equal to a threshold value, and a processing unit to execute a channel prediction algorithm when the SNR of the received signal is determined to be less than or equal to the threshold value.

Abstract translation: 提供了用于卫星通信中的前向链路的自适应编码和调制（ACM）装置和方法。 ACM装置可以包括：接收单元，用于接收接收信号的信噪比（SNR）;确定单元，用于确定接收信号的SNR是否小于或等于阈值;以及处理 当接收信号的SNR被确定为小于或等于阈值时执行信道预测算法的单元。

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：US20180139711A1

公开(公告)日：2018-05-17

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: H04W56/00

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′.

公开(公告)号：US20150162977A1

公开(公告)日：2015-06-11

申请号：US14315555

申请日：2014-06-26

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Mankyu PARK ,  Hyun Ha HONG ,  Deock Gil OH

IPC: H04B7/185 ,  H04B7/212

CPC classification number: H04B7/18528 ,  H04B7/18563 ,  H04B7/2125 ,  H04L12/4641

Abstract: A control method of a satellite communication network controller is provided. The satellite communication network controller registers terminals included in a plurality of satellite communication networks. The satellite communication network controller receives first data transmitted by a first terminal from a first central station included in a first satellite communication network. The satellite communication network controller searches from the terminals, a second terminal which is a destination of the first data. The satellite communication network controller determines a second central station to receive the first data by using registered information of the second terminal. The satellite communication network controller transmits the first data to the second central station. The second central station is included in the second satellite communication network.

Abstract translation: 提供了一种卫星通信网络控制器的控制方法。 卫星通信网络控制器注册包括在多个卫星通信网络中的终端。 卫星通信网络控制器从包括在第一卫星通信网络中的第一中心站接收由第一终端发送的第一数据。 卫星通信网络控制器从终端搜索作为第一数据的目的地的第二终端。 卫星通信网络控制器通过使用第二终端的注册信息来确定第二中心站来接收第一数据。 卫星通信网络控制器将第一数据发送到第二中心站。 第二个中心站包含在第二个卫星通信网络中。

公开(公告)号：US20150061909A1

公开(公告)日：2015-03-05

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：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.

公开(公告)号：US20150333936A1

公开(公告)日：2015-11-19

申请号：US14609759

申请日：2015-01-30

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Pan Soo KIM ,  Deock Gil OH

IPC: H04L25/03

CPC classification number: H04L25/03038 ,  H04L25/03057 ,  H04L25/0328 ,  H04L2025/03484 ,  H04L2025/03636 ,  H04L2025/03675 ,  H04L2025/03726

Abstract: Disclosed are a communication apparatus and a communication method capable of improving transmitting/receiving frequency efficiency of a satellite signal per bandwidth or spectral efficiency (S.E) per bandwidth by removing and improving a distortion or inter-symbol interference for applying a minimum-mean square error (MMSE) equalizer required to detect a frame synchronization and a modulation code rate in a satellite service for satellite broadcasting or communication under the variable coding and modulation (VCM) or adaptive coding and modulation (ACM) environment.

Abstract translation: 公开了一种能够通过去除和改善用于应用最小均方误差的失真或符号间干扰来提高每个带宽的带宽或频谱效率（SE）的卫星信号的发射/接收频率效率的通信装置和通信方法 （VCM）或自适应编码和调制（ACM）环境中的用于卫星广播或通信的卫星服务中的帧同步和调制码率所需的MMSE均衡器。