公开(公告)号：US20150111595A1

公开(公告)日：2015-04-23

申请号：US14304352

申请日：2014-06-13

Applicant: Electronics and Telecommunications Research Institute

Inventor： Sung-Jin YOO ,  Sung-Hyun HWANG ,  Jung-Sun UM ,  Byung-Jang JEONG

IPC: H04W16/14 ,  H04W72/04

CPC classification number: H04W16/14 ,  H04L27/0006 ,  H04W72/04

Abstract: Provided are a method of scheduling spectrum sensing and a method of allocation uplink radio resource in a cognitive radio communication system. The method of scheduling spectrum sensing in a cognitive radio communication system includes classifying terminals in a cell into terminals affecting spectrum sensing and terminals not affecting spectrum sensing, and performing spectrum sensing when it is determined that uplink signals of other terminals do not affect spectrum sensing based on results of the classification.

Abstract translation: 提供了一种在认知无线电通信系统中调度频谱感测的方法和分配上行链路无线电资源的方法。 在认知无线电通信系统中调度频谱感测的方法包括将小区中的终端分类为影响频谱感测的终端和不影响频谱感测的终端，并且当确定其他终端的上行链路信号不影响基于频谱感测时，执行频谱感测 对分类结果。

公开(公告)号：US20180138995A1

公开(公告)日：2018-05-17

申请号：US15811402

申请日：2017-11-13

Applicant: Electronics and Telecommunications Research Institute

Inventor： Kyu-Min KANG ,  Jae-Cheol PARK ,  Seung-Keun PARK ,  Sung-Jin YOO ,  Hye-Yeon KWON ,  Yun-Bae KIM ,  Igor KIM ,  Jung-Sun UM ,  Young-Hwan LEE ,  Hoi-Yoon JUNG ,  Su-Na CHOI ,  Hyung-Do CHOI ,  Sung-Hyun HWANG

IPC: H04B17/345 ,  H04B3/46

CPC classification number: H04B17/345 ,  H04B3/46 ,  H04B17/14

Abstract: Disclosed herein are an apparatus and method for measuring a broadband Passive Intermodulation Distortion (PIMD) signal. The apparatus for measuring a broadband PIMD signal includes a Radio Frequency (RF) processing unit for combining one or more transmission signals into a single output signal and transmitting the output signal to a feeder so as to measure a PIMD signal and for generating a beat frequency signal using the PIMD signal received from the feeder, and a digital processing unit for transferring a control signal required so as to control the RF processing unit, receiving the beat frequency signal, and then measuring a location of a passive element in the feeder in which the PIMD signal has been generated by performing digital signal processing on the beat frequency signal.

公开(公告)号：US20150092871A1

公开(公告)日：2015-04-02

申请号：US14311579

申请日：2014-06-23

Applicant: Electronics and Telecommunications Research Institute

Inventor： Sung-Hyun HWANG ,  Jung-Sun UM ,  Sung-Jin YOO ,  Byung-Jang JEONG ,  Myung-Sun SONG

IPC: H04L25/02

CPC classification number: H04L25/0204 ,  H04L25/022 ,  H04L25/0232

Abstract: Disclosed herein are an apparatus and a method of estimating a channel in consideration of a residual synchronization offset. The apparatus of estimating a channel in consideration of a residual synchronization offset includes: a channel estimating unit estimating the channel using pilots scattered over a plurality of OFDM symbols and calculating a first channel estimated value as the estimation result, in the case in which an OFDM symbol estimating the channel and an OFDM symbol compensating for the channel are different from each other; and a phase reflecting unit calculating a phase generated by the residual synchronization offset in proportion to a difference between a channel estimation time and a channel compensation time, reflecting the calculated phase in the first channel estimated value, and calculating a second channel estimated value as the reflection result.

Abstract translation: 本文公开了考虑到残余同步偏移来估计信道的装置和方法。 考虑到残余同步偏移来估计信道的装置包括：信道估计单元，其使用在多个OFDM符号上分散的导频并计算第一信道估计值作为估计结果来估计信道，其中OFDM 估计信道的符号和补偿信道的OFDM符号彼此不同; 以及相位反映部，其将所述残差同步偏移产生的相位与信道估计时间和信道补偿时间之间的差成比例地计算，反映所述计算出的所述第一信道估计值的相位，并计算第二信道估计值为 反思结果。