公开(公告)号：US20240175979A1

公开(公告)日：2024-05-30

申请号：US18504343

申请日：2023-11-08

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Myung Sun SONG ,  Hyung Ju KIM ,  Sung Jin YOO ,  Byung Jang JEONG ,  Seung Keun PARK ,  In Kui CHO

IPC: G01S7/35

CPC classification number: G01S7/358 ,  G01S13/343

Abstract: Exemplary embodiments provide a radar apparatus having a plurality of antenna elements and enabling to reduce a number of ADCs as long as being allowable according to a bandwidth of the ADC, reduce a chip area occupied by the ADC and interconnections in an integrated circuit, and prevent a synchronization problem between the ADCs by sampling receive signals of multiple channels at once. Frequencies of local oscillation signals used for downconverting receive signals are set to be different from each other by an amount of an offset frequency, so that each of band-limited receive signals obtained through respective RF paths may occupy a different position on a frequency axis of a frequency domain. Downconverted receive signals are combined into a single signal and converted into a single digital signal stream, and a signal processing of the digital signal stream in a digital domain enables to obtain target data.

公开(公告)号：US20210168853A1

公开(公告)日：2021-06-03

申请号：US17176175

申请日：2021-02-15

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jung Sun UM ,  Hoiyoon JUNG ,  Seung Keun PARK ,  Sungjin YOO

IPC: H04W72/14 ,  H04W72/12 ,  H04L27/26 ,  H04L5/00 ,  H04W72/04 ,  H04L27/00 ,  H04W16/14 ,  H04L25/02 ,  H04W84/12 ,  H04W74/08

Abstract: Disclosed herein is a method for transmitting, by a terminal, a sounding reference signal (SRS). The terminal receives a grant for uplink multiple subframes from a base station. The terminal determines a first subframe for an SRS transmission of the terminal among the uplink multiple subframes on the basis of SRS transmission position information received from the base station. Further, the terminal transmits the SRS in the first subframe.

公开(公告)号：US20200275373A1

公开(公告)日：2020-08-27

申请号：US16612329

申请日：2018-05-08

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sung Hyun HWANG ,  Seung Keun PARK ,  Yong Ho KIM

IPC: H04W52/02

Abstract: An operation method of a communication node for supporting a low power mode in a wireless LAN is disclosed. A method for operating an access point comprises: a step of transmitting a CTS frame to protect transmission of a wake-up packet, a step of transmitting the wake-up packet to wake up a station including PCR and WURx; and a step of transmitting a data frame to the station. Therefore, the performance of the communication system can be improved.

公开(公告)号：US20190327672A1

公开(公告)日：2019-10-24

申请号：US16341857

申请日：2017-10-12

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sung Hyun HWANG ,  Igor KIM ,  Seung Keun PARK

IPC: H04W52/02 ,  H04L5/00 ,  H04L12/24 ,  H04W12/06

Abstract: Disclosed are a method and an apparatus for initial negotiation in a wireless LAN. An operating method of a station in a communication system comprises the steps of: generating a probe request frame including WUR capability information of the station which supports a WUR mode; transmitting the probe request frame; and receiving a probe response frame from an access point having received the probe request frame. Therefore, the performance of the communication system can be improved.

公开(公告)号：US20180317256A1

公开(公告)日：2018-11-01

申请号：US15771490

申请日：2017-02-01

Applicant: Electronics And Telecommunications Research Institute

Inventor： Jung Sun UM ,  Hoi Yoon JUNG ,  Seung Keun PARK ,  Sung Jin YOO

IPC: H04W74/08 ,  H04W72/12 ,  H04L27/26 ,  H04W16/14 ,  H04W72/10 ,  H04W48/10

CPC classification number: H04L5/00 ,  H04L27/26 ,  H04W72/04 ,  H04W72/12 ,  H04W84/04 ,  H04W84/12

Abstract: Disclosed is a method for communicating in a network supporting licensed and unlicensed bands. A terminal operation method comprises the steps of: detecting a control channel of a subframe #n transmitted from a base station; obtaining, from the control channel, a DCI for an uplink grant; executing channel sensing on the basis of channel connection-related information included in the DCI; and transmitting, to the base station, a subframe #(n+1) if the result of executing channel sensing is an idle state. Thus, the performance of the communication network may be improved.

公开(公告)号：US20180317255A1

公开(公告)日：2018-11-01

申请号：US15770838

申请日：2017-02-03

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jung Sun UM ,  Hoi Yoon JUNG ,  Seung Keun PARK ,  Sung Jin YOO

IPC: H04W72/14 ,  H04W16/14 ,  H04W72/12

Abstract: Disclosed is a method for scheduling an uplink transmission in a communication network. A terminal operation method comprises the steps of: detecting a control channel of a subframe #n transmitted from a base station; receiving an uplink grant from the control channel; and transmitting, to the base station, a plurality of subframes scheduled by the uplink grant. Thus, the performance of the communication network may be improved.

公开(公告)号：US20170230129A1

公开(公告)日：2017-08-10

申请号：US15217884

申请日：2016-07-22

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sung Jin YOO ,  Kyu Min KANG ,  Seung Keun PARK ,  Jae Cheol PARK ,  Jung Sun UM ,  Hoi Yoon JUNG

IPC: H04J11/00 ,  H04L1/24 ,  H04L12/26 ,  H04W24/06

CPC classification number: H04L1/244 ,  H04B17/0085 ,  H04B17/11 ,  H04B17/15 ,  H04L1/206 ,  H04W24/06

Abstract: Provided is a PIM detection apparatus including: a tone signal input unit configured to apply a tone signal having a first frequency characteristic to a test target apparatus; a sequence signal input unit configured to apply a sequence signal having a second frequency characteristic to the test target apparatus; a PIM detector configured to receive a Passive Intermodulation (PIM) signal from the test target apparatus, and to detect a delay time and a size of the PIM signal based on the sequence signal; and a PIM position determiner configured to determine a PIM occurrence position by using the delay time and the size of the PIM signal.

公开(公告)号：US20160269303A1

公开(公告)日：2016-09-15

申请号：US15065602

申请日：2016-03-09

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Seung Keun PARK ,  Sungjin YOO ,  Jung Sun UM ,  Hoiyoon JUNG ,  Hyung Do CHOI

IPC: H04L12/807 ,  H04W74/08

CPC classification number: H04W74/085 ,  H04W84/12

Abstract: A wireless device of a communication system randomly selects a backoff counter at a contention window interval corresponding to a contention window size that is determined according to a backoff stage, attempts packet transmission, when the backoff counter becomes 0 while reducing the backoff counter, when a radio channel is in an idle status, and increases the contention window size while increasing the backoff stage by 1 according to a first predetermined condition. In this case, as the backoff stage increases, a contention window size has a concave down increasing form.

Abstract translation: 通信系统的无线装置在对应于根据退避阶段确定的竞争窗口大小的竞争窗口间隔随机地选择退避计数器，当拒绝计数器变为0同时减少退避计数器时，尝试分组传输，当a 无线电信道处于空闲状态，并且根据第一预定条件增加竞争窗口大小，同时将退避阶段增加1。 在这种情况下，当退避阶段增加时，竞争窗口大小具有凹下向上的形式。

公开(公告)号：US20160234763A1

公开(公告)日：2016-08-11

申请号：US15017361

申请日：2016-02-05

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jung Sun UM ,  Hoi Yoon JUNG ,  Seung Keun PARK ,  Sung Jin YOO

IPC: H04W48/16 ,  H04W72/04

CPC classification number: H04W48/16 ,  H04L5/0007 ,  H04L5/005 ,  H04L5/14 ,  H04L27/2601 ,  H04W24/02 ,  H04W48/20 ,  H04W72/042

Abstract: An exemplary embodiment of the present information discloses a base station which transmits a discovery reference signal (DRS) in an unlicensed band, including: a transmission control unit which sets different timings to transmit the DRS for each of a plurality of channels; and a communication unit which transmits the DRS to the outside through the plurality of channels based on the set timing.

Abstract translation: 本信息的示例性实施例公开了一种在未许可频带中发送发现参考信号（DRS）的基站，包括：传输控制单元，其针对多个信道中的每一个设置不同的定时以发送DRS; 以及基于所设定的定时，通过多个信道将DRS发送到外部的通信单元。

公开(公告)号：US20140148113A1

公开(公告)日：2014-05-29

申请号：US13911501

申请日：2013-06-06

Applicant: Electronics and Telecommunications Research Institute

Inventor： Su Na CHOI ,  Seung Keun PARK

IPC: H04B1/10

CPC classification number: H04B1/1027

Abstract: An apparatus and method for evaluating statistical interference concerning a multi-source noise environment of an electromagnetic (EM) zone are disclosed. The apparatus for evaluating statistical interference may include a receiver to receive an EM wave in a preset frequency band, a spectrum analyzer to analyze the received EM wave and to measure interference in the preset frequency band, a frequency selector to select an interest frequency in the frequency band based on a level of the measured interference, an amplitude probability distribution (APD) measurement unit to measure an APD of an interference signal with respect to the interest frequency, and a comparator to compare the measured APD to a preset limit and to draw a probability of the limit or higher of interference occurring.

Abstract translation: 公开了一种用于评估关于电磁（EM）区域的多源噪声环境的统计干扰的装置和方法。 用于评估统计干扰的装置可以包括：接收器，用于接收预置频带中的EM波;频谱分析器，用于分析所接收的EM波并测量预置频带中的干扰;频率选择器，用于在 基于所测量的干扰水平的频带，用于测量相对于兴趣频率的干扰信号的APD的幅度概率分布（APD）测量单元，以及将测量的APD与预设极限进行比较并绘制 干扰发生的极限或更高的概率。