公开(公告)号：KR1020030056269A

公开(公告)日：2003-07-04

申请号：KR1020010086466

申请日：2001-12-28

Applicant: 한국전자통신연구원

Inventor： 서재현 ,  이용태 ,  김형남 ,  김승원 ,  류영재 ,  김정진 ,  한동석

IPC: H04N7/015

CPC classification number: H04L25/03019 ,  H04L2027/0065 ,  H04L2027/0069

Abstract: PURPOSE: An apparatus and method for compensating for a carrier frequency offset using comparison of power of spectrum edge are provided to compensate for a frequency offset rapidly and accurately even when pilot power is reduced or distortion is generated in a pilot signal. CONSTITUTION: An analog/digital converter(101) converts an analog input signal into a digital signal. An automatic frequency controller(103) compares powers of outer portions of both sides of a baseband signal spectrum converted into a digital signal to estimate a frequency offset. A loop filter(106) and a numerical controlled oscillator(102) compensates for the estimated frequency offset. A phase controller(104) compensates for a remaining phase offset of carrier. The loop filter accumulates the number of times of changing the sign of a signal output from a sign determinator of the phase offset estimator to judge a remaining frequency offset and variably adjusts the bandwidth of the loop filter to compensate for the estimated frequency offset.

Abstract translation: 目的：提供使用频谱边缘功率比较来补偿载波频率偏移的装置和方法，即使当导频功率降低或导频信号中产生失真时，也可以快速，准确地补偿频偏。 构成：模拟/数字转换器（101）将模拟输入信号转换为数字信号。 自动频率控制器（103）比较转换成数字信号的基带信号频谱的两侧的外部功率来估计频率偏移。 环路滤波器（106）和数控振荡器（102）补偿估计的频率偏移。 相位控制器（104）补偿载波的剩余相位偏移。 环路滤波器累积改变从相位偏移估计器的符号确定器输出的信号的符号的次数，以判断剩余频率偏移，并可变地调整环路滤波器的带宽以补偿估计的频率偏移。

公开(公告)号：KR101988893B1

公开(公告)日：2019-09-30

申请号：KR1020120144273

申请日：2012-12-12

Applicant: 한국전자통신연구원

Inventor： 고상춘 ,  문재경 ,  민병규 ,  박영락 ,  안호균 ,  김정진 ,  남은수

IPC: H01L21/78 ,  H01L21/301

公开(公告)号：KR101923972B1

公开(公告)日：2018-11-30

申请号：KR1020120148675

申请日：2012-12-18

Applicant: 한국전자통신연구원

Inventor： 안호균 ,  임종원 ,  김정진 ,  김해천 ,  문재경 ,  남은수

IPC: H01L29/778 ,  H01L21/335

CPC classification number: H01L29/7787 ,  H01L29/2003 ,  H01L29/201 ,  H01L29/205 ,  H01L29/42316 ,  H01L29/4236 ,  H01L29/42376 ,  H01L29/51 ,  H01L29/518 ,  H01L29/66462 ,  H01L29/7786

Abstract: 전계효과트랜지스터가제공된다. 이트랜지스터는기판상에순차적으로적층된활성층및 캡핑층, 캡핑층상에서로이격되어배치된소스오믹전극및 드레인오믹전극, 및소스오믹전극과드레인오믹전극사이의기판상에배치되되, 캡핑층을관통하여활성층에연결된게이트전극을포함한다. 게이트전극은활성층에연결된좁은폭을갖는다리부및 다리부보다넓은폭을갖는다리부상의머리부로구성된다. 게이트전극이연장되는방향의게이트전극의양 말단부위들의게이트전극의다리부는나머지부위의게이트전극의머리부보다좁고, 그리고다리부보다넓은폭을갖는다.

公开(公告)号：KR100399054B1

公开(公告)日：2003-09-26

申请号：KR1020010086466

申请日：2001-12-28

Applicant: 한국전자통신연구원

Inventor： 서재현 ,  이용태 ,  김형남 ,  김승원 ,  류영재 ,  김정진 ,  한동석

IPC: H04N7/015

Abstract: PURPOSE: An apparatus and method for compensating for a carrier frequency offset using comparison of power of spectrum edge are provided to compensate for a frequency offset rapidly and accurately even when pilot power is reduced or distortion is generated in a pilot signal. CONSTITUTION: An analog/digital converter(101) converts an analog input signal into a digital signal. An automatic frequency controller(103) compares powers of outer portions of both sides of a baseband signal spectrum converted into a digital signal to estimate a frequency offset. A loop filter(106) and a numerical controlled oscillator(102) compensates for the estimated frequency offset. A phase controller(104) compensates for a remaining phase offset of carrier. The loop filter accumulates the number of times of changing the sign of a signal output from a sign determinator of the phase offset estimator to judge a remaining frequency offset and variably adjusts the bandwidth of the loop filter to compensate for the estimated frequency offset.

Abstract translation: 目的：提供一种利用频谱边缘的功率比较来补偿载波频率偏移的设备和方法，以即使在导频信号中导频功率减小或失真时也快速和准确地补偿频率偏移。 构成：模拟/数字转换器（101）将模拟输入信号转换为数字信号。 自动频率控制器（103）比较转换成数字信号的基带信号频谱两侧的外部部分的功率，以估计频率偏移。 环路滤波器（106）和数控振荡器（102）补偿估计的频率偏移。 相位控制器（104）补偿载波的剩余相位偏移。 环路滤波器累加改变从相位偏移估计器的符号确定器输出的信号的符号的次数以判断剩余频率偏移并且可变地调整环路滤波器的带宽以补偿估计的频率偏移。