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    DEMODULATION DEVICE AND METHOD IN TRANSMISSION SYSTEM
    3.
    发明申请
    DEMODULATION DEVICE AND METHOD IN TRANSMISSION SYSTEM 审中-公开
    传输系统中的解调装置和方法

    公开(公告)号：WO2009020275A1

    公开(公告)日：2009-02-12

    申请号：PCT/KR2008/002695

    申请日：2008-05-14

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  SEO, Jae Hyun ,  KIM, Young Su ,  YANG, Kyu Tae ,  KIM, Ju Yeun ,  CHOI, Seomee ,  BAE, Jae-Hwui ,  LEE, Gwang Soon ,  YUN, Joung il ,  KIM, Kwang-Yong ,  KIM, Heung Mook ,  LIM, Jong Soo ,  LEE, Soo In

    Inventor： SEO, Jae Hyun ,  KIM, Young Su ,  YANG, Kyu Tae ,  KIM, Ju Yeun ,  CHOI, Seomee ,  BAE, Jae-Hwui ,  LEE, Gwang Soon ,  YUN, Joung il ,  KIM, Kwang-Yong ,  KIM, Heung Mook ,  LIM, Jong Soo ,  LEE, Soo In

    IPC: H04L27/26

    CPC classification number: H04L27/2604 ,  H04L25/0224 ,  H04L27/2649

    Abstract: A hierarchical demodulation device channel estimates a reference symbol based on a given symbol to generate a channel estimate of the reference symbol, channel estimates a plurality of information symbols based on the channel estimate of the reference symbol to generate channel estimates of a plurality of information symbols, channel estimates a plurality of service symbols based on the channel estimates of a plurality of information symbols to generate channel estimates of a plurality of service symbols, channel equalizes a signal based on the channel estimate of the reference symbol, the channel estimates of a plurality of information symbols, and the channel estimates of a plurality of service symbols, and hierarchically separates the channel equalized signal to generate a first hierarchical modulation signal and a second hier¬ archical modulation signal. Therefore, receiving performance of the low priority signals can be improved without influencing the high priority signals while maintaining compatibility with the existing system.

    Abstract translation: 分层解调设备信道基于给定符号估计参考符号以生成参考符号的信道估计，信道基于参考符号的信道估计来估计多个信息符号，以生成多个信息符号的信道估计 信道基于多个信息符号的信道估计来估计多个服务符号以生成多个服务符号的信道估计，信道根据参考符号的信道估计来均衡信号，多个信道符号的信道估计 的信息符号和多个服务符号的信道估计，并且分级地分离信道均衡信号以生成第一分层调制信号和第二等级调制信号。 因此，可以提高低优先级信号的接收性能，而不影响高优先级信号，同时保持与现有系统的兼容性。

    APPARATUS AND METHOD FOR SELECTING OPTIMAL SIGNAL USING AUXILIARY EQUALIZATION IN DIVERSITY RECEIVER
    5.
    发明申请
    APPARATUS AND METHOD FOR SELECTING OPTIMAL SIGNAL USING AUXILIARY EQUALIZATION IN DIVERSITY RECEIVER 审中-公开
    在多样化接收机中使用辅助均衡选择最佳信号的装置和方法

    公开(公告)号：WO2007066904A1

    公开(公告)日：2007-06-14

    申请号：PCT/KR2006/004626

    申请日：2006-11-07

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  KIM, Ju-Yeun ,  KIM, Young-Su ,  BAE, Jae-Hwui ,  LEE, Hyun ,  LIM, Jong-Soo ,  LEE, Soo-In

    Inventor： KIM, Ju-Yeun ,  KIM, Young-Su ,  BAE, Jae-Hwui ,  LEE, Hyun ,  LIM, Jong-Soo ,  LEE, Soo-In

    IPC: H04B7/08

    CPC classification number: H04B7/082

    Abstract: Provided are an apparatus and method for selecting an optimal signal using auxiliary equalization in a diversity receiver. The optimal signal selecting apparatus includes: a plurality of sync recovery units for extracting sync information from baseband signals, which are candidate signals, except a baseband signal selected as a current optimal signal a plurality of auxiliary equalizers for channel-equalizing the candidate signals based on the extracted sync information; a plurality of SNR measuring units for measuring signal-to-noise ratios (SNRs) of the candidate signals inputted to the auxiliary equalizers and the candidates signals equalized in the auxiliary equalizers; and an optimal signal selector for selecting an optimal candidate signal from the candidate signals by using the extracted sync information and the measured SNRs, and replacing the optimal signal with the optimal candidate signal when reception quality of the current optimal signal is poor.

    Abstract translation: 提供了一种用于在分集接收机中使用辅助均衡来选择最佳信号的装置和方法。 最佳信号选择装置包括：多个同步恢复单元，用于从作为候选信号的基带信号中提取同步信息，除了选择为当前最优信号的基带信号，多个辅助均衡器，用于对候选信号进行信道均衡，基于 提取的同步信息; 多个SNR测量单元，用于测量输入到辅助均衡器的候选信号的信噪比（SNR）和在辅助均衡器中均衡的候选信号; 以及最优信号选择器，用于通过使用所提取的同步信息和测量的SNR从候选信号中选择最佳候选信号，并且当当前最佳信号的接收质量差时，用最佳候选信号替换最佳信号。

    BEAM COMBINING AND HYBRID BEAM SELECTION METHOD FOR IMPROVING DIGITAL BROADCASTING RECEPTION PERFORMANCE, AND DIGITAL BROADCASTING RECEIVING APPARATUS USING THE SAME
    6.
    发明申请
    BEAM COMBINING AND HYBRID BEAM SELECTION METHOD FOR IMPROVING DIGITAL BROADCASTING RECEPTION PERFORMANCE, AND DIGITAL BROADCASTING RECEIVING APPARATUS USING THE SAME 审中-公开
    用于改善数字广播接收性能的光束组合和混合光束选择方法以及使用该数字广播接收装置的数字广播接收装置

    公开(公告)号：WO2006065011A1

    公开(公告)日：2006-06-22

    申请号：PCT/KR2005/002117

    申请日：2005-07-04

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  KIM, Ju-Yeun ,  KIM, Young-Su ,  BAE, Jae-Hwui ,  LEE, Hyun ,  LIM, Jong-Soo ,  LEE, Soo-In

    Inventor： KIM, Ju-Yeun ,  KIM, Young-Su ,  BAE, Jae-Hwui ,  LEE, Hyun ,  LIM, Jong-Soo ,  LEE, Soo-In

    IPC: H04N7/015

    CPC classification number: H01Q25/00 ,  H04B7/088 ,  H04N5/211 ,  H04N5/4401 ,  H04N21/42638

    Abstract: Provided are a beam combining and hybrid beam selection method that can improve digital broadcasting reception performance by combining more than two beam output signals (beam combination type) instead of simply selecting one of beam output signals (beam selection type), or even selecting an optimal method between the beam selection type and the beam combination type, and a digital broadcasting receiving apparatus using the same. The beam selecting method includes: a) calculating SMNRs (mainpath signal to multipath signal and noise ratios) with respect to a plurality of beam output signals, formed according to directions from a plurality of antenna output signals whose phases are shifted depending on arrangement positions of array antennas, by using corresponding channel impulse responses; b) selecting a first predetermined number of beam output signals according to magnitudes of the SMNRs by comparing the calculated SMNRs with respect to the respective beam output signals; c) calculating a delay time between mainpath signals of the selected beam output signals, and generating a combined beam output signal by combining the two beam output signals by adjusting the calculated delay time; d) when the SMNR of the combined beam output signal is less than the maximal SMNR of the selected beam output signals, calculating an SDMR (mainpath signal to dominant multipath signal ratio) with respect to the respective beam output signals, and selecting a beam output signal having the greatest SDMR; and e) calculating an SMNR of the combined beam output signal using channel impulse response of the combined beam output signal, and comparing the calculated SMNR with a maximal value among the SMNRs of the selected beam output signals; and f) when the SMNR of the combined beam output signal is greater than or equal to the maximal SMNR of the selected output signals, selecting the combined beam output signal generated in step c).

    Abstract translation: 提供了一种通过组合两个以上的光束输出信号（光束组合型）而不是简单地选择光束输出信号（光束选择型）中的一种，或者甚至选择最优的光束组合和混合光束选择方法来提高数字广播接收性能 波束选择类型和波束组合类型之间的方法以及使用它们的数字广播接收装置。 波束选择方法包括：a）相对于多个波束输出信号计算SMNR（主路径信号与多径信号和噪声比），根据多个天线输出信号的方向形成，所述多个天线输出信号的相位根据 阵列天线，通过使用相应的信道脉冲响应; b）通过将所计算的SMNR相对于各个波束输出信号进行比较，根据SMNR的幅度来选择第一预定数量的波束输出信号; c）计算所选择的光束输出信号的主路径信号之间的延迟时间，并且通过通过调整所计算的延迟时间来组合两个光束输出信号来产生组合光束输出信号; d）当组合光束输出信号的SMNR小于所选光束输出信号的最大SMNR时，相对于各个光束输出信号计算SDMR（主路径信号与主要多径信号比），并且选择光束输出 SDMR信号最大; 以及e）使用所述组合光束输出信号的信道脉冲响应来计算组合光束输出信号的SMNR，并且将所计算的SMNR与所选光束输出信号的SMNR中的最大值进行比较; 以及f）当组合光束输出信号的SMNR大于或等于所选输出信号的最大SMNR时，选择在步骤c）中产生的组合光束输出信号。

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