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91. 发明公开

KR1020100028478A ＯＦＤＭ 또는 ＯＦＤＭＡ 시스템에서 다중 송신 안테나에 대한 레퍼런스 신호 전송 장치 失效
标题翻译：用于OFDM或OFDMA系统的多个发射天线的参考信号传输装置
公开(公告)号：KR1020100028478A
公开(公告)日：2010-03-12
申请号：KR1020090072717
申请日：2009-08-07
申请人： 한국전자통신연구원
发明人： 서방원 , 고영조 , 안재영
IPC分类号： H04J11/00 , H04B7/04 , H04W88/08
CPC分类号： H04L27/2611 , H04L5/0048 , H04L25/0224 , H04W88/02 , H04W88/08
摘要： PURPOSE: A device for transmitting a reference signal about a multiple transmission antenna in an OFDM or OFDMA system is provided to improve a data transmission rate by transmitting four data streams or more in a base station at the same time. CONSTITUTION: A base station includes a reference signal generator(810), a wireless resource allocator(820), and a transmitter(850). The reference signal generator generates a second reference signal based on a first reference signal. The wireless resource allocator allocates the same wireless resource to the first and second reference signals. The transmitter transmits the first and second reference signals to the terminal using the wireless resource. The reference signal generator generates the second reference signal by changing the phase of the first reference signal.
摘要翻译：目的：提供一种用于在OFDM或OFDMA系统中发送关于多发射天线的参考信号的装置，以通过在基站中同时发送四个数据流或更多数据来提高数据传输速率。构成：基站包括参考信号发生器（810），无线资源分配器（820）和发射机（850）。参考信号发生器基于第一参考信号产生第二参考信号。无线资源分配器向第一和第二参考信号分配相同的无线资源。发射机使用无线资源向终端发送第一和第二参考信号。参考信号发生器通过改变第一参考信号的相位产生第二参考信号。

92. 发明公开

KR1020090114336A 단일 캐리어 주파수 분할 다중 접속 시스템을 위한 다중 안테나 송신 장치 및 방법 有权
标题翻译：用于使用多个天线发送数据的装置和方法用于信号载波频分多址接入系统
公开(公告)号：KR1020090114336A
公开(公告)日：2009-11-03
申请号：KR1020090037576
申请日：2009-04-29
申请人： 한국전자통신연구원
发明人： 정병장 , 안재영 , 고영조 , 서방원
IPC分类号： H04J11/00 , H04B7/208
CPC分类号： H04L5/0023 , H04L1/0041 , H04L25/03343 , H04L27/2636 , H04L27/2647 , H04L2025/03426 , H04B7/0697 , H04L27/2614
摘要： PURPOSE: A multiple antenna for a single carrier frequency division multiple access system is provided to improve system performance of a single carrier frequency division multiplexing access system by implementing efficient spatial multiplexing. CONSTITUTION: In a multiple antenna for a single carrier frequency division multiple access system, layer mappers(140,141) map a modulation symbol included in a coding word to at least layer. Layer shifters(150,151) divide the modulation symbol mapped in each layer in a plurality of time domain streams equally. Signal transmission parts(160,161) produce a single carrier frequency multiplex connection signal based on the plural time domain streams. A signal transmission part transmits the single carrier frequency multiplex connection signal to a receiving device by using a plurality of antennas. The layer shifter changes a order or a phase of the modulation symbol mapped in each layer.
摘要翻译：目的：提供单载波频分多址系统的多天线，通过实现高效的空间复用来提高单载波频分复用接入系统的系统性能。构成：在用于单载波频分多址系统的多天线中，层映射器（140,141）将包括在编码字中的调制符号映射到至少层。层移位器（150,151）平均地划分多个时域流中映射在每个层中的调制符号。信号传输部分（160,161）基于多个时域流产生单载波频率复用连接信号。信号发送部通过使用多个天线将单载波频率复用连接信号发送到接收装置。层移位器改变映射在每层中的调制符号的顺序或相位。

93. 发明授权

KR100776646B1 ＯＦＤＭ 기반 셀룰러 시스템에서의 채널 추정 방법 및장치 有权
标题翻译： OFDM细胞系统中的信道估计
公开(公告)号：KR100776646B1
公开(公告)日：2007-11-19
申请号：KR1020060095813
申请日：2006-09-29
申请人： 한국전자통신연구원
发明人： 서방원 , 안재영 , 이성은 , 홍대식
IPC分类号： H04L27/26
CPC分类号： H04L25/0212 , H04L27/2628 , H04L27/2675
摘要： A channel estimating method and apparatus in an OFDM(Orthogonal Frequency Division Multiplexing) cellular system is provided to improve a channel estimating performance by estimating and eliminating mutual interference in a channel estimating process. An estimation response to a high-density pilot symbol is calculated by extracting a subcarrier of the high-density pilot symbol(501). The calculated estimation response is divided into several sections at a predetermined interval to calculate a division response in each divided section(504). A channel response to the high-density pilot symbol is calculated by using the first division response(505). An estimation response to a low-density pilot symbol is calculated by extracting a subcarrier of the low-density pilot symbol(506,508). A channel response to the low-density pilot symbol is calculated by subtracting an accumulated value of the division response from the estimation response of the low-density pilot symbol(509).
摘要翻译：提供OFDM（正交频分复用）蜂窝系统中的信道估计方法和装置，以通过估计和消除信道估计过程中的相互干扰来改善信道估计性能。通过提取高密度导频符号（501）的子载波来计算对高密度导频符号的估计响应。将计算出的估计响应以预定间隔分成几个部分，以计算每个分割部分（504）中的分割响应。通过使用第一除法响应（505）来计算对高密度导频符号的信道响应。通过提取低密度导频符号（506,508）的子载波来计算对低密度导频符号的估计响应。通过从低密度导频符号（509）的估计响应中减去分频响应的累积值来计算对低密度导频符号的信道响应。

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