公开(公告)号：KR1020120051460A

公开(公告)日：2012-05-22

申请号：KR1020100112903

申请日：2010-11-12

Applicant: 한국전자통신연구원 ,  충남대학교산학협력단

Inventor： 김병학 ,  신철호 ,  오미경 ,  안재민 ,  김정빈 ,  김재길

IPC: H04J11/00

CPC classification number: H04B1/123 ,  H04J11/00 ,  H04L25/0224 ,  H04L27/2695

Abstract: PURPOSE: A receiving apparatus in an OFDM(Orthogonal Frequency Division Multiplexing) system is provided to detect reception signals by estimating distortion matrices combining the unbalanced component of in-phase signals and Quadrature-phase signals and a channel frequency response characteristic. CONSTITUTION: A distortion matrix estimating unit receives a preamble signal including two different long training field symbols. The distortion matrix estimating unit estimates a distortion matrix. An OFDM(Orthogonal Frequency Division Multiplexing) signal processing unit compensates for distortion components from the reception signals by using the distortion matrix. A transmitter includes a preamble generation unit and an OFDM signal processing unit. The preamble generation unit transmits the preamble through two symbol periods by applying Alamouti technique to make a 2x2 non-singular matrix. The OFDM signal processing unit processes transmission signals and the preamble by OFDM.

Abstract translation: 目的：提供OFDM（正交频分复用）系统中的接收装置，通过估计组合同相信号的不平衡分量和正交相位信号以及信道频率响应特性的失真矩阵来检测接收信号。 构成：失真矩阵估计单元接收包括两个不同的长训练场符号的前导码信号。 失真矩阵估计单元估计失真矩阵。 OFDM（正交频分复用）信号处理单元通过使用失真矩阵来补偿来自接收信号的失真分量。 发射机包括前导码生成单元和OFDM信号处理单元。 前导码生成单元通过应用Alamouti技术来形成2×2个非奇异矩阵，通过两个符号周期来发送前同步码。 OFDM信号处理单元通过OFDM处理发送信号和前导码。

公开(公告)号：KR101097295B1

公开(公告)日：2011-12-22

申请号：KR1020100036259

申请日：2010-04-20

Applicant: 충남대학교산학협력단

Inventor： 안재민 ,  김재길 ,  김정빈 ,  황진용 ,  신동철

IPC: H04L27/26

Abstract: 본발명의일실시예에따른 OFDM 시스템에서직접변환송수신기의 IQ 불균형추정및 보상방법은, 하나의 OFDM(Orthogonal Frequency Division Multiplexing) 심벌을사용하여 I/Q(In-phase/Quadrature-phase) 불균형성분(&egr;, &egr;, &thetas;, &thetas;) 및왜곡성분(α, &bgr;, γ, δ)을추정하는단계; 상기왜곡성분(α, &bgr;)을입력받아역 고속푸리에변환(IFFT: Inverse Fast Fourier Transform) 이후의시간영역에서기저대역송신신호를왜곡시키는단계; 및상기왜곡성분(γ, δ)을입력받아고속푸리에변환(FFT: Fast Fourier Transform) 이전의시간영역에서왜곡된기저대역수신신호를보상하는단계를포함한다.