公开(公告)号：US20150188746A1

公开(公告)日：2015-07-02

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: H04L27/26 ,  H04J11/00

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。