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公开(公告)号：KR1020100106924A
公开(公告)日：2010-10-04
申请号：KR1020100024088
申请日：2010-03-18
Applicant: 한국전자통신연구원
CPC classification number: H04B7/0473 , H04L27/2636
Abstract: 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).
Abstract translation: 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）。
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公开(公告)号：KR1020100004051A
公开(公告)日：2010-01-12
申请号：KR1020090057692
申请日：2009-06-26
Applicant: 한국전자통신연구원
CPC classification number: H04B7/12 , H04L1/0042 , H04L1/04 , H04L5/0023 , H04L5/0044 , H04L25/03159 , H04L25/03866 , H04L2025/03414
Abstract: PURPOSE: A method and an apparatus for transmitting and receiving transmission antenna diversity using cyclic subcarrier shift are provided to use multi antennas while keeping a PAPR(Peak to Average Power Ratio) low, thereby transmitting data in a form for providing transmission diversity. CONSTITUTION: A DFT(Discrete Fourier Transform) spread unit(110) performs DFT on a modulated symbol. The spread unit generates frequency domain symbols. A resource mapper(120) maps each frequency domain symbol on a plurality of frequency domain streams. Cyclic shift units cyclically transits each frequency domain stream. Signal transmission units transmit the time domain streams.
Abstract translation: 目的：提供一种使用循环子载波移位发送和接收发送天线分集的方法和装置，以使PAPR（峰均功率比）保持较低，从而以提供发送分集的形式发送数据。 构成：DFT（离散傅立叶变换）扩展单元（110）对调制符号执行DFT。 扩展单元生成频域符号。 资源映射器（120）映射多个频域流上的每个频域符号。 循环移位单元循环地转换每个频域流。 信号传输单元传输时域流。
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公开(公告)号：KR100901760B1
公开(公告)日：2009-06-11
申请号：KR1020070113568
申请日：2007-11-08
Applicant: 한국전자통신연구원 , 동국대학교 산학협력단
CPC classification number: H04L1/206
Abstract: 순환 지연 다이버시티(CDD, cyclic delay diversity)에 관한 것으로서, 특히 최적의 순환 지연 값을 갖는 순환 지연 다이버시티 방법 및 장치를 개시한다.
다이버시티 차수에 따른 신호대잡음간섭 함수를 결정하는 단계와, 채널 추정 오류 분산 함수를 결정하는 단계 및 상기 신호대잡음간섭 함수 및 채널 추정 오류 분산 함수에 따라서 시스템에 요구되는 SINR을 결정하는 단계를 포함하는 최적의 순환 지연 값을 결정하는 방법을 제공한다.
CDD(cyclic delay diversity), SINR, 순환 지연,-
公开(公告)号：KR1020080052323A
公开(公告)日：2008-06-11
申请号：KR1020070095440
申请日：2007-09-19
Applicant: 한국전자통신연구원 , 재단법인서울대학교산학협력재단
CPC classification number: H04L27/261 , H04B7/2621 , H04L27/2626
Abstract: 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.
Abstract translation: 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。
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公开(公告)号：KR1020080052133A
公开(公告)日：2008-06-11
申请号：KR1020070018976
申请日：2007-02-26
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2614 , H04L5/0007 , H04L25/0204 , H04L25/0224 , H04L25/0226 , H04L27/2602 , H04L27/2607 , H04L27/2613 , H04L5/0048 , H04L5/0032 , H04L27/2675
Abstract: 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.
Abstract translation: 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。
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Patent Agency Ranking
公开(公告)号：KR100829817B1
公开(公告)日：2008-05-16
申请号：KR1020070011015
申请日：2007-02-02
Applicant: 한국전자통신연구원
CPC classification number: H04B7/15542
Abstract: 중계기간의 간섭과 기지국 및 중계기 사이의 간섭을 줄여 자원 이용 효율을 높일 수 있는 셀룰러 시스템의 설계 방법에 따른 기지국, 중계기 및 단말이 개시된다.
중계기는 기지국에 의해 서비스되는 단말이 전송하는 제어 신호를 획득하여, 제어 신호의 레벨이 임계값보다 높은 단말을 간섭 단말 리스트에 등록한다. 그리고, 중계기는 기지국의 자원 할당 정보를 통해 간섭 단말 리스트에 속한 간섭 단말에 할당된 자원인 간섭 자원을 파악한다. 그리고, 중계기는 기지국으로부터 할당받은 자원 중에서 간섭 자원을 제외한 자원인 가용 자원을 파악하여, 가용 자원 중 일부를 단말에 할당한다.
중계기, 기지국, 간섭 회피-
公开(公告)号：KR1020080042680A
公开(公告)日：2008-05-15
申请号：KR1020070102610
申请日：2007-10-11
Applicant: 한국전자통신연구원
CPC classification number: H04L5/0007 , H04J11/00 , H04L5/0028 , H04L5/0048 , H04L25/0226 , H04L27/0008 , H04L27/2607 , H04L27/262 , H04L27/261 , H04L27/2628
Abstract: An apparatus and a method of pilot transmission to coexist OFDMA(Orthogonal Frequency Division Multiple Access) and SC-FDMA(Single Carrier-Frequency Division Multiple Access) are provided to use a pilot of a proper form according to a channel environment by allowing a pilot incorporated in an SC-FDMA symbol to have a flexible pattern. An apparatus of pilot transmission to coexist OFDMA and SC-FDMA includes a pilot inserting device(63), an up-sampling processing device(65), an interpolation processor(66), and a cyclic prefix(CP) inserting device(68). The pilot inserting device inserts a pilot into a symbol by receiving pilot information. The up-sampling processing device performs up-sampling parallel data inputted from a serial/parallel converter(64). The interpolation processor performs interpolation for symbols up-sampled by the up-sampling processing device. The cyclic prefix inserting device inserts a cyclic prefix symbol into output data of a parallel/serial converter(67).
Abstract translation: 提供了一种用于共存OFDMA（正交频分多址）和SC-FDMA（单载波 - 频分多址）的导频传输的装置和方法，以便根据信道环境使用适当形式的导频， 并入SC-FDMA符号以具有灵活的图案。 用于共存OFDMA和SC-FDMA的导频传输装置包括导频插入装置（63），上采样处理装置（65），内插处理器（66）和循环前缀（CP）插入装置（68） 。 导频插入装置通过接收导频信息将导频插入符号。 上采样处理装置执行从串行/并行转换器（64）输入的并行数据并行数据。 内插处理器对由上采样处理装置进行上采样的符号进行插值。 循环前缀插入装置将循环前缀符号插入到并行/串行转换器（67）的输出数据中。
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公开(公告)号：KR102207184B1
公开(公告)日：2021-01-25
申请号：KR1020140055724
申请日：2014-05-09
Applicant: 한국전자통신연구원 , 경희대학교 산학협력단
IPC: H04B7/26
Abstract: 본발명은셀룰러네트워크에서의단말간(Device-to-Device; D2D) 직접통신에관한것이다. 상기와같은과제를해결하기위한본 발명의일 실시예에따른셀룰러네트워크상에서의통신방법은제1 단말이기지국에대하여제2 단말과의통신을위한스케줄링요청을전송하는단계, 상기제1 단말이상기제2 단말과통신하기위한제어정보를상기기지국으로부터수신하는단계, 및상기제1 단말이상기제어정보에기초하여상기제2 단말에대하여데이터를물리적하향링크공유채널(PDSCH)을통해전송하는단계를포함한다. .
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公开(公告)号：KR102058538B1
公开(公告)日：2019-12-23
申请号：KR1020130061162
申请日：2013-05-29
Applicant: 한국전자통신연구원
IPC: H04N21/60 , H04N21/478
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