公开(公告)号：US09137053B2

公开(公告)日：2015-09-15

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: H04K1/10 ,  H04L27/28 ,  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，并且计算第二信道估计值为 反思结果。

公开(公告)号：US09467320B2

公开(公告)日：2016-10-11

申请号：US14450757

申请日：2014-08-04

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jung-Sun Um ,  Sung-Hyun Hwang ,  Sung-Jin Yoo ,  Byung-Jang Jeong ,  Jae-Ick Choi

IPC: H04J3/00 ,  H04L27/26

CPC classification number: H04L27/2663 ,  H04L27/2646 ,  H04L27/2656 ,  H04L27/266 ,  H04W48/16

Abstract: Disclosed herein are a method and a system for performing initial ranging in a cognitive radio network The method for performing initial ranging in a cognitive radio network includes: detecting signals received in one or more ranging sections; estimating a tint time offset based on a correlation between subcarrier indices of the signals detected in the one or more ranging sections; estimating a second time offset based on correlations for the signals detected in the one or more ranging sections and a plurality of codes that are predetermined and detecting an initial ranging code among the plurality of codes; and estimating a time offset of a CPE performing initial ranging with the detected initial ranging code using the first time offset and the second time offset that are estimated.

Abstract translation: 这里公开了一种用于在认知无线电网络中执行初始测距的方法和系统。用于在认知无线电网络中执行初始测距的方法包括：检测在一个或多个测距部分中接收的信号; 基于在所述一个或多个测距段中检测到的信号的子载波索引之间的相关性来估计色调时间偏移; 基于在所述一个或多个测距段中检测到的信号的相关性和预定的多个代码并检测所述多个代码中的初始测距码来估计第二时间偏移; 以及使用所估计的所述第一时间偏移和所述第二时间偏移来估计执行初始测距的CPE与所检测的初始测距码的时间偏移。