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    • 121. 发明公开
    • MΙMO 시스템을 위한 레이어 혼합 방법 및 장치
    • MIMO通信系统中层移位的方法与装置
    • KR1020100106924A
    • 2010-10-04
    • KR1020100024088
    • 2010-03-18
    • 한국전자통신연구원
    • 서방원정병장고영조안재영
    • H04B7/04H04L27/26
    • H04B7/0473H04L27/2636
    • PURPOSE: A method and an apparatus for layer shifting in a MIMO communication system are provided to use a multi-antenna technique with an orthogonal frequency division multiple access technique while maintaining the characteristics of a single carrier frequency division multiple access signal having a low maximum/minimum power ratio. CONSTITUTION: A method for layer shifting in a MIMO communication system comprises the steps of: dividing at least one codeword comprising modulation symbols(810); mapping at least one divided codeword to plural layers; mixing the plural layers by DFT symbol unit(820); performing a DFT conversion for the mixed plural layers(830); and mapping the plural layer to at least one antenna port(840-850).
    • 目的:提供一种在MIMO通信系统中进行层移的方法和装置,以使用具有正交频分多址技术的多天线技术,同时保持具有低最大/最小值的单载波频分多址信号的特性, 最小功率比。 构成:MIMO通信系统中的层移动方法包括以下步骤:将至少一个包含调制符号的码字(810)进行划分; 将至少一个划分的码字映射到多个层; 通过DFT符号单元(820)混合多个层; 对混合的多层(830)执行DFT转换; 以及将所述多层映射到至少一个天线端口(840-850)。
    • 124. 发明公开
    • OFDMA/FDD 방식 통신 시스템에서의 상향링크사운딩 신호 전송 제어 장치 및 그 제어 방법
    • 用于控制在OFDMA / FDD电信系统中发送上行信号的装置和方法
    • KR1020080052323A
    • 2008-06-11
    • KR1020070095440
    • 2007-09-19
    • 한국전자통신연구원재단법인서울대학교산학협력재단
    • 이효진정병장정현규최정민이판형이재홍
    • H04L27/26H04B7/26
    • H04L27/261H04B7/2621H04L27/2626
    • An apparatus and a method for controlling a transmission of an uplink sounding signal in an OFDMA/FDD communication system are provided to improve a data transmission rate and a proportional fairness of a proportional fair scheduler by transmitting a sounding signal to terminals based on the proportional fairness. An apparatus for controlling a transmission of an uplink sounding signal in an OFDMA/FDD communication system includes a data sub-band number determination unit(410), and a sounding sub-band number determination unit(420). The data sub-band determination unit determines the number of data sub-bands to be used in a transmission of a data signal through an uplink frame based on a channel gain of each of terminals. The sounding sub-band determination unit determines the number of sounding sub-bands to be used in a sounding signal transmission through the uplink frame in proportion to the number of sub-bands to be used in terminals.
    • 提供了一种用于控制OFDMA / FDD通信系统中的上行链路探测信号的传输的装置和方法,以通过基于比例公平性向终端发送探测信号来提高比例公平调度器的数据传输速率和比例公平性 。 一种用于在OFDMA / FDD通信系统中控制上行探测信号的传输的装置包括数据子带号确定单元(410)和探测子带号确定单元(420)。 数据子带确定单元基于每个终端的信道增益来确定通过上行链路帧在数据信号的传输中要使用的数据子带的数量。 探测子波段确定单元与终端中要使用的子带的数量成比例地确定通过上行链路帧的探测信号传输中使用的探测子带的数量。
    • 125. 发明公开
    • 무선 통신 시스템의 파일롯 신호 송수신 장치 및 그 방법
    • 无线通信系统收发机试点信号的装置及方法
    • KR1020080052133A
    • 2008-06-11
    • KR1020070018976
    • 2007-02-26
    • 한국전자통신연구원
    • 정병장노태균정현규
    • H04J11/00H04L27/26
    • H04L27/2614H04L5/0007H04L25/0204H04L25/0224H04L25/0226H04L27/2602H04L27/2607H04L27/2613H04L5/0048H04L5/0032H04L27/2675
    • An apparatus and a method for transmitting/receiving a pilot signal of a wireless communication system are provided to support at least two channels in an SC-FDMA system simultaneously by maintaining frequency resolution of a frequency area. An apparatus for transmitting a pilot signal of a wireless communication system comprises a digital Fourier transformer(213), a pilot signal generator(220), a time division multiplexer(218), and a symbol and sub-carrier mapping unit(214). The digital Fourier transformer performs a digital Fourier transform for a data signal. The pilot signal generator generates a pilot signal shifted for a predetermined interval in a frequency area. The time division multiplexer performs time division multiplexing for the pilot signal and the transformed data signal and transmits the time division multiplexed signal through an antenna. The symbol and sub-carrier mapping unit determines a sub-carrier transmitting the pilot signal and the data signal and maps the data signal to the determined sub-carrier.
    • 提供用于发送/接收无线通信系统的导频信号的装置和方法,以通过维持频率区域的频率分辨率来同时支持SC-FDMA系统中的至少两个信道。 用于发送无线通信系统的导频信号的装置包括数字付里叶变换器(213),导频信号发生器(220),时分复用器(218)和符号和子载波映射单元(214)。 数字傅立叶变换器对数据信号进行数字傅里叶变换。 导频信号发生器产生在频率区域中移动预定间隔的导频信号。 时分复用器对导频信号和变换后的数据信号进行时分复用,并通过天线发送时分复用信号。 符号和子载波映射单元确定发送导频信号和数据信号的子载波,并将数据信号映射到确定的子载波。