公开(公告)号：KR101426033B1

公开(公告)日：2014-08-01

申请号：KR1020130068781

申请日：2013-06-17

Applicant: 숭실대학교산학협력단

Inventor： 임성빈 ,  김선호 ,  문우식

IPC: G11B7/0065 ,  H04N1/409

CPC classification number: H04N1/387 ,  G11B7/0065

Abstract: Disclosed are a repetitive equalization method based on a contraction mapping theorem suitable for a channel environment formed in consideration of a 2D interference of a holographic channel, a system thereof, and a recording medium. The equalization method performed in a holographic data storage system includes the steps of: processing data passing through a preset holographic channel through a predetermined function; detecting a fixed point using contraction mapping on the processed data; and equalizing the data passed through the channel using the detected fixed point.

Abstract translation: 公开了一种基于适合于考虑到全息信道的2D干扰，其系统和记录介质形成的信道环境的收缩映射定理的重复均衡方法。 在全息数据存储系统中执行的均衡方法包括以下步骤：通过预定功能处理通过预设全息通道的数据; 使用经处理的数据的收缩映射来检测固定点; 并使用检测到的固定点均衡通过信道的数据。

公开(公告)号：KR1020110007481A

公开(公告)日：2011-01-24

申请号：KR1020090065027

申请日：2009-07-16

Applicant: 숭실대학교산학협력단

Inventor： 임성빈 ,  문우식 ,  심희성 ,  박혁기

IPC: H04B7/14 ,  H04B7/005

CPC classification number: H04B7/15585 ,  H04W84/08

Abstract: PURPOSE: A wireless repeater with a feedback interference cancelling device and a method thereof are provided to increase quality of a signal by cancelling a feedback interference in a communication system using the same frequency band. CONSTITUTION: A frequency down converter(120) converts a band of an amplified signal into an IF(Intermediate Frequency) band. An ADC(Analog to Digital Converter)(130) converts the down-converted analog signal into a digital signal. A feedback interference cancelling device(140) cancels a feedback interference signal in the digital signal. A DAC(Digital to Analog Converter)(150) converts the feedback interference signal cancelled signal into an analog signal.

Abstract translation: 目的：提供具有反馈干扰消除装置的无线中继器及其方法，以通过消除使用相同频带的通信系统中的反馈干扰来提高信号的质量。 构成：降频转换器（120）将放大信号的频带转换成IF（中频）频带。 ADC（模数转换器）（130）将下变频的模拟信号转换为数字信号。 反馈干扰消除装置（140）抵消数字信号中的反馈干扰信号。 DAC（数模转换器）（150）将反馈干扰信号消除信号转换为模拟信号。

公开(公告)号：KR101295131B1

公开(公告)日：2013-08-16

申请号：KR1020120047801

申请日：2012-05-07

Applicant: 숭실대학교산학협력단

Inventor： 임성빈 ,  문우식

IPC: H04L27/01 ,  H04L27/26

CPC classification number: H04L27/01 ,  H04L27/2695

Abstract: PURPOSE: A time-domain equalization device and method using an orthogonal matching pursuit (OMP) algorithm in an orthogonal frequency division multiplexing (OFDM) system are provided to reduce channel estimation complexity, noise effect, and the number of required filters. CONSTITUTION: A time-domain equalization device (100) includes a signal reception part (110) and a channel estimation part (130). The signal reception part receives an OFDM signal transmitted from an external device and separates a pilot symbol from the received OFDM signal. The channel estimation part selects a support, which is an index showing the location of a non-zero element in a sparse channel vector, and adds to a support set. The channel estimation part estimates original sparse time-varying channel from the pilot symbol obtained through the signal reception part by using a sensing matrix of a pre-set pilot symbol and the support set, and repeatedly performs support selection, support addition, and channel estimation. The channel estimation part estimates a sparse time-varying channel, obtains an inverse function of the estimated sparse time-varying channel, and then equalizes the received OFDM signal. [Reference numerals] (110) Signal reception part; (130) Channel estimation part

Abstract translation: 目的：提供一种在正交频分复用（OFDM）系统中使用正交匹配追踪（OMP）算法的时域均衡设备和方法，以减少信道估计复杂度，噪声效应和所需滤波器数量。 构成：时域均衡装置（100）包括信号接收部（110）和信道估计部（130）。 信号接收部接收从外部装置发送的OFDM信号，并从接收到的OFDM信号中分离导频符号。 信道估计部分选择支持，该支持是表示稀疏信道向量中的非零元素的位置的索引，并将其添加到支持集合。 信道估计部通过使用预先设定的导频符号和支持集的感测矩阵，从通过信号接收部获得的导频符号来估计原始稀疏时变信道，并且重复执行支持选择，支持加法和信道估计 。 信道估计部分估计稀疏时变信道，获得估计的稀疏时变信道的逆函数，然后对接收的OFDM信号进行均衡。 （附图标记）（110）信号接收部; （130）信道估计部