公开(公告)号：KR1020120071127A

公开(公告)日：2012-07-02

申请号：KR1020100132736

申请日：2010-12-22

Applicant: 한국전자통신연구원

Inventor： 유덕현

IPC: H04J11/00

CPC classification number: H04L27/2675 ,  H03J7/04 ,  H04L27/2657 ,  H01J11/00

Abstract: PURPOSE: An automatic frequency control apparatus and method are provided to maintain good channel environment by correcting a frequency error more precisely in a high speed moving environment. CONSTITUTION: An error measurement part(310) measures errors of a receiving frequency and a transmission frequency. The error measurement part stores the measured frequency errors. A comparison part(320) compares the number of times of frequency error measurement at the error measurement part with the reference number of times for compensating for frequency estimation. A first compensation part(330) compensates for frequencies by using the frequency errors according to a comparison result by the comparison part. A second compensation part(340) compensates for a frequency value to be used before a next frequency control cycle according to the comparison result by the comparison part.

Abstract translation: 目的：提供一种自动频率控制装置和方法，通过在高速移动环境中更准确地校正频率误差来保持良好的信道环境。 构成：误差测量部分（310）测量接收频率和传输频率的误差。 误差测量部分存储测量的频率误差。 比较部分（320）将误差测量部分的频率误差测量次数与用于补偿频率估计的参考次数进行比较。 第一补偿部件（330）根据比较部分的比较结果通过使用频率误差来补偿频率。 第二补偿部件（340）根据比较部分的比较结果来补偿在下一个频率控制周期之前要使用的频率值。

公开(公告)号：KR1020110068790A

公开(公告)日：2011-06-22

申请号：KR1020100047605

申请日：2010-05-20

Applicant: 한국전자통신연구원

Inventor： 좌혜경 ,  김일규 ,  신무용 ,  신형철 ,  유덕현

IPC: H04L27/26

CPC classification number: H04L27/2695 ,  H04L27/2636

Abstract: PURPOSE: An apparatus and method for estimating a channel in a frequency domain are provided to estimate a channel using a cell specified reference signal and a user specified reference signal. CONSTITUTION: A data receiving unit(200) receives data by including a plurality of antennas. The data receiving unit converts a received RF band signal into a baseband signal. A CP(Cyclic Prefix) is removed from the converted signal. A frequency selection degree obtaining unit(210) obtains a frequency selection degree of received data. The frequency selection degree obtaining unit includes a noise signal distribution calculating unit(214) and a signal to noise ratio calculating unit(216). The signal to noise ratio calculating unit calculates a signal to noise ratio using a channel frequency response. A channel estimating unit(220) estimates a channel frequency response by a selected channel estimating technique.

Abstract translation: 目的：提供用于估计频域中的信道的装置和方法，以使用小区指定的参考信号和用户指定的参考信号来估计信道。 构成：数据接收单元（200）通过包括多个天线来接收数据。 数据接收单元将接收的RF频带信号转换为基带信号。 从转换的信号中移除CP（循环前缀）。 频率选择度获取单元（210）获得接收数据的频率选择程度。 频率选择度获取单元包括噪声信号分布计算单元（214）和信噪比计算单元（216）。 信噪比计算单元使用信道频率响应来计算信噪比。 信道估计单元（220）通过所选择的信道估计技术估计信道频率响应。

公开(公告)号：KR102029467B1

公开(公告)日：2019-10-07

申请号：KR1020120001654

申请日：2012-01-05

Applicant: 한국전자통신연구원 ,  엠티에이치 주식회사 ,  엘지전자 주식회사

Inventor： 유덕현

IPC: H04J11/00

公开(公告)号：KR1020160028972A

公开(公告)日：2016-03-14

申请号：KR1020150123723

申请日：2015-09-01

Applicant: 한국전자통신연구원 ,  주식회사 감마누

Inventor： 홍승은 ,  유덕현 ,  김일규 ,  오경섭 ,  김상진

IPC: H04B7/04 ,  H04B7/06

Abstract: 부하변조기반빔공간 MIMO 전송방법및 장치가개시된다. 빔공간 MIMO 전송장치는, 복수의허수임피던스소자를각각포함하는복수의임피던스로딩회로, 공간다중화신호에대응하여복수의허수임피던스소자의로딩값을계산하는빔공간 MIMO 제어부, 그리고소정의캐리어주파수를가지는제1 신호를생성하는 RF 체인부를포함할수 있다.

Abstract translation: 公开了用于发送基于负载调制的波束空间MIMO的方法和装置。 用于发送波束空间MIMO的装置包括：分别包括多个虚数阻抗装置的多个阻抗加载电路; 波束空间MIMO控制单元，用于响应于空间复用信号计算虚数阻抗设备的负载值; 以及用于产生具有特定载波频率的第一信号的RF改变单元。

公开(公告)号：KR1020140041348A

公开(公告)日：2014-04-04

申请号：KR1020130112949

申请日：2013-09-24

Applicant: 한국전자통신연구원

Inventor： 유덕현

IPC: H04B7/005 ,  H04B17/00

CPC classification number: H04B7/01 ,  H04L27/0014 ,  H04L2027/0026

Abstract: A method for controlling an uplink frequency and a terminal device using the same are provided. A method for controlling an uplink frequency according to the present invention includes a step of measuring a frequency offset for a first downlink and a second downlink, calculating the difference between the first downlink frequency offset and the second downlink frequency offset, drawing a Doppler frequency offset from the calculated frequency offset difference, and correcting the uplink frequency offset using the Doppler frequency offset component. Thereby, the present invention simplifies a baseband design of a base station and improves an uplink SNR performance by controlling an uplink frequency through simple computation in a terminal. [Reference numerals] (AA) Start; (BB) End; (S610) Measuring a downlink frequency offset for each link; (S620) Calculating the difference of the frequency offset between the link 1 and the link 2; (S630) Deriving the Doppler frequency offset from the difference between the frequency offsets; (S640) Correcting each uplink frequency offset using the derived Doppler frequency offset

Abstract translation: 提供了一种用于控制上行链路频率的方法和使用其的终端设备。 根据本发明的用于控制上行链路频率的方法包括测量第一下行链路和第二下行链路的频率偏移的步骤，计算第一下行链路频率偏移和第二下行链路频率偏移之间的差，绘制多普勒频率偏移 根据计算出的频率偏差差，使用多普勒频偏分量来校正上行频率偏移。 因此，本发明简化了基站的基带设计，并且通过终端中的简单计算来控制上行链路频率来提高上行链路SNR性能。 （附图标记）（AA）开始; （BB）结束; （S610）测量每个链路的下行链路频率偏移量; （S620）计算链路1和链路2之间的频率偏移的差异; （S630）从频率偏移之间的差导出多普勒频偏; （S640）使用导出的多普勒频率偏移校正每个上行频率偏移

公开(公告)号：KR1020130080694A

公开(公告)日：2013-07-15

申请号：KR1020120001654

申请日：2012-01-05

Applicant: 한국전자통신연구원

Inventor： 유덕현

IPC: H04J11/00

CPC classification number: H04L27/2647 ,  H04L27/2657 ,  H04L27/2686 ,  H04J11/00 ,  H04L27/2695

Abstract: PURPOSE: A device and a method for automatically controlling a frequency are provided to reduce errors of a packet by compensating frequency errors of a carrier wave. CONSTITUTION: An automatic frequency control device (100) includes a frequency error detection unit (110), a frequency error prediction unit (120), and a frequency error compensation unit (130). The frequency error detection unit obtains a frequency error detection value of a received carrier wave. The frequency error prediction unit calculates a first frequency error prediction value based on the frequency error detection value when the frequency error detection value satisfies a preset first reference. The frequency error compensation unit calculates a second frequency error prediction value by correcting the first frequency error prediction value and compensates the frequency of the carrier wave based on the calculated second frequency error prediction value when a frequency change rate of the received carrier wave satisfies a preset second reference. [Reference numerals] (110) Frequency error detection unit; (120) Frequency error prediction unit; (130) Frequency error compensation unit

Abstract translation: 目的：提供一种用于自动控制频率的装置和方法，以通过补偿载波的频率误差来减少分组的误差。 构成：自动频率控制装置（100）包括频率误差检测单元（110），频率误差预测单元（120）和频率误差补偿单元（130）。 频率误差检测单元获得接收的载波的频率误差检测值。 当频率误差检测值满足预设的第一参考时，频率误差预测单元基于频率误差检测值来计算第一频率误差预测值。 频率误差补偿单元通过校正第一频率误差预测值来计算第二频率误差预测值，并且当所接收的载波的频率变化率满足预设值时，基于计算出的第二频率误差预测值来补偿载波的频率 第二个参考。 （附图标记）（110）频率误差检测单元; （120）频率误差预测单元; （130）频率误差补偿单元