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    • 23. 发明授权
    • 이동통신 시스템의 채널 추정 장치 및 방법
    • 用于在移动通信系统中估计信道的装置和方法
    • KR101478203B1
    • 2014-12-31
    • KR1020080082727
    • 2008-08-25
    • 삼성전자주식회사
    • 이정호김성수
    • H04B7/26
    • 본발명은이동통신시스템에서채널추정에관한것으로, 수신단은, 수신된파일럿(pilot) 신호들을이용하여추정된초기채널추정값들을초기 CIR(Channel Impulse Response)로변환하는제1연산기와, 상기초기 CIR 내에서기준이상의전력을나타내는구간들을그룹들로정의하고, 상기그룹들을전력의내림차순으로정렬하는정렬기와, MMSE(Minimum Mean Square Error) 행렬을압축한압축행렬을이용하여상기그룹들의그룹 CIR들을정렬된순서에따라순차적으로보정하는처리기와, 상기초기 CIR에서보정된그룹 CIR들로인한간섭성분을제거함으로써최적화된 CIR을생성하는제거기와, 상기최적화된 CIR을주파수영역의채널추정값들로변환하는제2연산기를포함하여, 채널추정시전력이존재하는위치에대하여 MMSE(Minimum Mean Square Error) 기법및 간섭제거를이용하여최적의 CIR(Channel Impulse Response)을추정함으로써, 채널추정성능을향상시킬수 있으며, 더욱이, MMSE 기법사용시, 압축된형태의 MMSE 행렬을이용함으로써, 소요되는메모리용량및 처리시간을단축시킬수 있다.
    • 28. 发明公开
    • 엑스선 영상 장치 및 그 제어 방법
    • X射线图像装置及其控制方法
    • KR1020140087246A
    • 2014-07-09
    • KR1020120156718
    • 2012-12-28
    • 삼성전자주식회사
    • 김성수오현화강동구강성훈성영훈이강의한석민
    • A61B6/03
    • A61B6/5294A61B6/0414A61B6/4241A61B6/482A61B6/502A61B6/5258A61B6/583
    • An apparatus for an X-ray image and a method of controlling the same according to an aspect of the present invention estimate an energy response characteristic of an X-ray detection unit, and compensate for distortion of X-ray data based on the estimated response characteristic. The apparatus for an X-ray image according to an aspect of the present invention includes an X-ray generation unit to generate and irradiate an X-ray; an X-ray detection unit to acquire X-ray data by detecting the irradiated X-ray; and a control unit to convert the X-ray data into an X-ray characteristic coordinate, and to estimate a response characteristic function of the X-ray detection unit from a relationship between measurement data converted into the X-ray characteristic coordinate and reference data.
    • 根据本发明的一个方面的X射线图像的装置及其控制方法估计X射线检测单元的能量响应特性,并且基于所估计的响应来补偿X射线数据的失真 特性。 根据本发明的一个方面的用于X射线图像的装置包括用于产生和照射X射线的X射线产生单元; X射线检测单元,其通过检测照射的X射线来获取X射线数据; 以及控制单元,用于将X射线数据转换成X射线特征坐标,并根据转换成X射线特征坐标的测量数据与参考数据之间的关系来估计X射线检测单元的响应特性函数 。