会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 3. 发明公开
    • 서로 다른 지연 시간을 갖는 OFDMA 기반의 무선 통신 네트워크를 위한 신호 검출 방법 및 장치
    • 基于无线网络的无线网络的信号检测方法和设备,具有不同的时间延迟
    • KR1020120026243A
    • 2012-03-19
    • KR1020100088356
    • 2010-09-09
    • 중앙대학교 산학협력단한국전자통신연구원
    • 조용수박창환임광재
    • H04J11/00
    • H04L27/2665H04J11/0036H04L27/2657
    • PURPOSE: A method for detecting a signal for a wireless communication network based on an OFDMA having different delay time and an apparatus thereof are provided to minimize an interference effect in a wireless communication network by determining an optimal FFT(Fast Fourier Transform) window start location according to each subcarrier. CONSTITUTION: An RF processing unit(400) includes a front end unit and a filter, etc. An ADC(402) changes an analog base band signal of the RF processing unit into a digital signal. A FFT(Fast Fourier Transform) operation unit(404) outputs a signal of a frequency domain by calculating the digital signal in fast fourier transformation. The FFT operation unit performs FFT calculation with the control of a FFT window controller(406). A communication device acquires symbol synchronization, removes CP(Cyclic Prefix), and parallely changes data outputted from the ADC. A FFT window start positioning unit(408) determines a FFT window start location for each subcarrier.
    • 目的:提供一种用于检测基于具有不同延迟时间的OFDMA的无线通信网络的信号的方法及其装置,以通过确定最佳FFT(快速傅立叶变换)窗口开始位置来最小化无线通信网络中的干扰效应 根据每个子载波。 构成:RF处理单元(400)包括前端单元和滤波器等.ADC(402)将RF处理单元的模拟基带信号改变为数字信号。 FFT(快速傅立叶变换)运算单元(404)通过在快速傅立叶变换中计算数字信号来输出频域的信号。 FFT运算单元通过FFT窗口控制器(406)的控制进行FFT运算。 通信设备获取符号同步,删除CP(循环前缀),并且平行地改变从ADC输出的数据。 FFT窗口开始定位单元(408)确定每个子载波的FFT窗口开始位置。
    • 5. 发明公开
    • 무선통신 시스템에서 파일럿 톤 기반의 채널 추정 방법 및장치
    • 基于无线通信系统中的试点通信的信道估计方法与装置
    • KR1020090077136A
    • 2009-07-15
    • KR1020080002908
    • 2008-01-10
    • 한국전자통신연구원중앙대학교 산학협력단
    • 서방원이희수정현규조용수박창환
    • H04L27/26H04B7/26
    • H04L25/0202H04L5/0007H04L27/2602
    • A method and an apparatus for estimating a channel based on pilot tones are provided to remove a process of estimating the phase rotation and correcting the estimated phase rotation by estimating a size and the phase of a channel estimating value of a data subcarrier. A pilot tone channel estimator(210) estimates a channel about a first subcarrier and a second subcarrier where a pilot signal is positioned in a received signal. Interpolation and extrapolation phase estimators(221,231) estimate the phase component of the data subcarrier by the phase component of the first subcarrier and the second subcarrier estimated by the pilot tone channel estimator. Interpolation and extrapolation channel size estimators(222,232) estimate the size of the channel estimation value about the data subcarrier by the channel estimation value of the first subcarrier and the second subcarrier estimated by the pilot tone channel estimator.
    • 提供了一种用于基于导频音频估计信道的方法和装置,以通过估计数据子载波的信道估计值的大小和相位来消除估计相位旋转并校正估计相位旋转的处理。 导频音信道估计器(210)估计关于导频信号位于接收信号中的第一子载波和第二子载波的信道。 插值和外推相位估计器(221,231)通过第一子载波的相位分量和由导频音信道估计器估计的第二副载波来估计数据子载波的相位分量。 插值和外推信道大小估计器(222,232)通过第一子载波的信道估计值和由导频音信道估计器估计的第二子载波来估计关于数据子载波的信道估计值的大小。