公开(公告)号：WO2012064030A3

公开(公告)日：2012-07-19

申请号：PCT/KR2011007963

申请日：2011-10-25

Applicant: KOREA ELECTRONICS TELECOMM ,  CHO SANG IN ,  KANG KYU MIN

Inventor： CHO SANG IN ,  KANG KYU MIN

IPC: H04J11/00

CPC classification number: H04L27/265 ,  H04L27/0006 ,  H04L27/2647

Abstract: The present invention relates to a method and device for sensing frequency for orthogonal frequency-division multiplexing (OFDM) systems, and more particularly, to a method for sensing the frequency of a reception signal received from the outside in order to perform one of a plurality of wireless communications. An OFDM device is required to examine a necessary frequency band before or after performing one of a plurality of wireless communications, and to determine whether the frequency band is used by another wireless communication.

Abstract translation: 本发明涉及用于检测正交频分复用（OFDM）系统的频率的方法和装置，更具体地说，涉及一种用于感测从外部接收的接收信号的频率以便执行多个 的无线通信。 需要OFDM装置在执行多个无线通信之一之前或之后检查必要的频带，并且确定频带是否被另一无线通信使用。

公开(公告)号：KR20100042133A

公开(公告)日：2010-04-23

申请号：KR20080101275

申请日：2008-10-15

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： CHO SANG IN ,  KANG KYU MIN ,  CHOI SANG SUNG

IPC: H04J11/00

CPC classification number: G06F17/142 ,  H04L27/2628 ,  H04L27/265

Abstract: PURPOSE: An apparatus and a method for executing a fourier transform is provided to reduce hardware capacity and power consumption of a fourier transform device by using a lookup table which is stored in advance instead of a butterfly operation. CONSTITUTION: A first stage part(310) outputs a first sequence including 32 complex values according to a search table which is stored in advance. A first rotation factor application part(320) outputs a second sequence including the 32 complex value. A second stage part(330) outputs a third sequence including 32 complex values. A third stage part(340) outputs a fourth sequence including 32 complex values. A second rotation factor application part(350) outputs a fifth sequence including the 32 complex value. A fourth stage part(360) outputs a sixth sequence including the 32 complex value.

Abstract translation: 目的：提供一种用于执行傅里叶变换的装置和方法，以通过使用预先存储的查找表而不是蝴蝶操作来降低傅里叶变换装置的硬件容量和功耗。 构成：第一阶段部分（310）根据预先存储的搜索表输出包括32个复数值的第一序列。 第一旋转因子应用部分（320）输出包括32个复数值的第二序列。 第二级部分（330）输出包括32个复数值的第三序列。 第三级部分（340）输出包括32个复数值的第四序列。 第二旋转因子应用部分（350）输出包括32个复数值的第五序列。 第四级部（360）输出包括32个复数值的第六序列。