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公开(公告)号：KR1020080023163A
公开(公告)日：2008-03-12
申请号：KR1020070090476
申请日：2007-09-06
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2601 , H04B7/02 , H04B7/155 , H04L25/0202 , H04L25/03866
Abstract: A method for transmitting signals, a method for creating a downlink frame, and a method for receiving signals are provided to improve a decoding performance by coherently decoding a broadcasting channel through presuming a channel by using a synchronization channel. A method for transmitting signals includes a step of applying a plurality of precoding vectors to a plurality of synchronous channel symbols. The precoding vector equal to the synchronous channel symbol is applied to a broadcasting channel symbol adjacent at the synchronous channel symbol. One frame has a plurality of sub-frames. The precoding vector has a different value according to each sub-frame. The precoding vector has a different value according to each sector. A precoding vector group has the precoding vectors. The precoding vector is applied with a different sequence in each sector of the sub-frames. The precoding vector is applied with a different sequence according to a cell.
Abstract translation: 提供一种用于发送信号的方法，一种用于创建下行链路帧的方法和一种用于接收信号的方法，用于通过使用同步信道预测信道来对广播信道进行相干解码来提高解码性能。 用于发送信号的方法包括将多个预编码向量应用于多个同步信道符号的步骤。 等同于同步信道符号的预编码向量被应用于在同步信道符号附近的广播信道符号。 一帧具有多个子帧。 根据每个子帧，预编码向量具有不同的值。 预编码向量根据每个扇区具有不同的值。 预编码向量组具有预编码向量。 在子帧的每个扇区中以不同的顺序应用预编码向量。 预编码向量根据小区应用不同的序列。
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公开(公告)号：KR100801284B1
公开(公告)日：2008-02-04
申请号：KR1020060086983
申请日：2006-09-08
Applicant: 한국전자통신연구원
Abstract: 직교 주파수 분할 다중(orthogonal frequency division multiplexing, OFDM) 방식 기반의 셀룰러 시스템의 이동국이 수신된 신호로부터 데이터를 복원하는 방법을 제공한다. 이동국은 수신 신호를 푸리에 변환, 등화하고, 수신 신호에 포함된 상기 이동국과 무선 접속된 셀 내의 페이딩으로 인한 간섭 성분 - 자기셀 페이딩 성분 - 과 인접 셀의 페이딩으로 인한 간섭 성분 - 타셀 페이딩 성분 - 이 포함된 채널 계수를 검출한다. 그리고 이동국은 수신 신호에 포함된 잡음 성분을 검출하여, 등화된 수신 시호, 채널 계수와 상기 수신 신호에 포함된 잡음 성분을 이용하여 로그 가능도비를 계산한 후 연판정을 수행하여 수신된 신호를 결정한다.
OFDM, 간섭, 로그 가능도비Abstract translation: 提供了一种用于基于正交频分复用（OFDM）从蜂窝系统的移动站中的接收信号中恢复数据的方法。 移动站接收的信号进行傅立叶变换，均衡，并且由于在小区接入干扰分量磁性细胞衰落的衰落分量包括在接收的信号和无线电成本的移动站 - 和相邻由于在小区干扰分量-tasel衰落分量衰落 - 并检测包含的频道系数。 通过检测包含在接收信号中的噪声分量，则确定使用包括在接收到的信号中的噪声分量的一个和所述均衡的接收志保，信道系数通过执行软判决信号计算接收后对数似然比的移动站 的。
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公开(公告)号：KR1020070121583A
公开(公告)日：2007-12-27
申请号：KR1020070061198
申请日：2007-06-21
Applicant: 한국전자통신연구원
CPC classification number: H04L25/0204 , H04L1/0071 , H04L1/06 , H04L5/0023 , H04L5/0037 , H04L5/005 , H04L5/0082 , H04L5/0092 , H04L25/0228 , H04L25/03828 , H04L27/2613 , H04L27/2655 , H04L2001/0093 , H04L5/0083
Abstract: Signal transmitting and receiving methods are provided to improve the receiving quality by reducing the block error rate of SCH(Synchronization Channel) and BCH(Broadcasting Channel) information and to decrease complexity of a mobile station as the mobile station needs not to perform blind detection for the number of transmitting antennas of a sector transmitter. A signal transmitting method is composed of steps of mapping plural SCH symbols and plural BCH symbols to the adjacent down-link frame; transmitting the down-link frame; allocating a first antenna to each SCH symbol; and allocating the first antenna to the BCH symbols adjacent to each SCH symbol. A step of mapping the symbols to the down-link frame comprises steps of allocating a first bandwidth to plural SCH symbols and allocating the first bandwidth to plural BCH symbols.
Abstract translation: 提供信号发送和接收方法，以通过减少SCH（同步信道）和BCH（广播信道）信息的块错误率来提高接收质量，并且随着移动台不需要执行盲检测，降低移动台的复杂度 扇区发射机的发射天线的数量。 信号发送方法包括将多个SCH符号和多个BCH符号映射到相邻的下行链路帧的步骤; 发送下行链路帧; 向每个SCH符号分配第一天线; 以及将第一天线分配给与每个SCH符号相邻的BCH符号。 将符号映射到下行链路帧的步骤包括以下步骤：将第一带宽分配给多个SCH符号，并将第一带宽分配给多个BCH符号。
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公开(公告)号：KR100785806B1
公开(公告)日：2007-12-13
申请号：KR1020060115448
申请日：2006-11-21
Applicant: 한국전자통신연구원
IPC: H04B7/26
CPC classification number: H04L5/0048 , H04B7/2621 , H04L5/12 , H04L25/0202
Abstract: A resource allocation method in an SC-FDMA(Single Carrier Frequency Division Multiple Access) communication system for efficient channel estimation and a device are provided to use pilots which are adjacent to all subcarriers allocated to one user for channel estimation even without increasing a PAPR(Peak-to-Average Power Ratio), thereby improving accuracy in channel estimation. Symbols to be sent by a user are divided into at least two groups(S610). DFT(Discrete Fourier Transform) processes are performed for the symbols according to each group to generate DFT data(S620). During resource allocation in long blocks through a distributive method for the DFT data, DFT data of the same sequence of each group are individually allocated to long blocks having neighboring subcarriers(S630). Pilots for the user channel estimation are allocated to short blocks adjacent to the long blocks having the neighboring subcarriers(S640).
Abstract translation: 提供用于高效信道估计的SC-FDMA（单载波频分多址）通信系统中的资源分配方法和设备，以便即使不增加PAPR，也可以使用与分配给一个用户的所有子载波相邻的导频， 峰值功率比），从而提高信道估计的精度。 要由用户发送的符号被划分为至少两个组（S610）。 对于根据每个组的符号执行DFT（离散傅立叶变换）处理以产生DFT数据（S620）。 在通过DFT数据的分配方法的长块资源分配期间，将各组的相同序列的DFT数据分别分配给具有相邻子载波的长块（S630）。 用于用户信道估计的导频被分配给与具有相邻子载波的长块相邻的短块（S640）。
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55.发明授权ＯＦＤＭ 셀룰러 시스템에서의 셀 탐색 방법, 순방향 링크프레임 전송 방법 및 이를 이용하는 장치 및 순방향 링크프레임 구조 失效小区搜索方法，前向链路帧传输方法，使用相同和前向链路帧结构的装置
公开(公告)号：KR100779092B1
公开(公告)日：2007-11-27
申请号：KR1020060074309
申请日：2006-08-07
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2656 , H04J11/0069 , H04L5/0016 , H04L5/005 , H04L27/2613 , H04L27/2675
Abstract: OFDM 셀룰러 시스템에서의 셀 탐색 방법, 순방향 링크 프레임 전송 방법, 이를 이용하는 장치 및 순방향 링크 프레임 구조가 개시된다. 이 셀 탐색 장치는 각 셀로부터, 인접하는 동기 채널 심볼 간의 간격이 서로 다른 동기 채널 심볼을 복수 개 포함하는 순방향 링크 프레임에 따른 신호를 수신하고, 상기 수신신호의 동기 채널을 이용하여, 동기채널 심볼의 동기를 획득하는 동기 획득부; 및 상기 획득된 동기를 기초로, 상기 동기 채널 심볼 간의 간격 패턴을 이용하여 프레임 경계를 검출하는 경계 검출부를 포함한다. 본 발명에 따르면, 낮은 복잡도로 셀 탐색 시간을 줄일 수 있다.
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Patent Agency Ranking
公开(公告)号：KR1020070108316A
公开(公告)日：2007-11-09
申请号：KR1020060084867
申请日：2006-09-04
Applicant: 한국전자통신연구원
CPC classification number: H04B7/0689 , H04B7/0408 , H04B7/0604 , H04B7/068 , H04B7/0695 , H04L1/0625 , H04L25/022 , H04L25/0228 , H04L27/2647 , Y02D70/142 , Y02D70/444
Abstract: A transmission diversity method for an SCH(Synchronization Channel) and a BCH(Broad casting Channel) in an OFDM(Orthogonal Frequency Division Multiplexing) cellular system is provided to detect OFDM symbol and frame timings during an initial power-on step, to estimate initial frequency offset, and to use the synchronization channel for coherent demodulation in demodulating the BCH by a mobile station. In an OFDM based cellular system defining an SCH and a BCH at a forward link, a transmission diversity method for the SCH and the BCH includes a step for arranging SCH and BCH symbols(192,193) adjacently to each other if two or more transmission antennas of a base station exist and a step for applying the same transmit diversity to the adjacent SCH and BCH symbols and then transmitting the SCH and BCH symbols through the same antenna.
Abstract translation: 提供了OFDM（正交频分复用）蜂窝系统中的SCH（同步信道）和BCH（Broadcast Channel）的传输分集方法，用于在初始加电步骤期间检测OFDM符号和帧定时，以估计初始 并且在移动台解调BCH时使用同步信道进行相干解调。 在前向链路上定义SCH和BCH的基于OFDM的蜂窝系统中，用于SCH和BCH的发送分集方法包括如下两个或更多个发送天线之间相互排列SCH和BCH符号（192,193）的步骤： 存在基站以及将相同的发送分集应用于相邻的SCH和BCH符号，然后通过同一个天线发送SCH和BCH符号的步骤。
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公开(公告)号：KR100763992B1
公开(公告)日：2007-10-08
申请号：KR1020060091571
申请日：2006-09-21
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2614 , H04L5/0007 , H04L5/0023 , H04L5/0037 , H04L5/0044
Abstract: 데이터 전송 속도의 감소 없이 PAPR 특성이 개선되는 OFDM 방식의 신호 전송 장치 및 신호 수신 장치가 개시된다.
신호 전송 장치는 디지털 변조된 심볼에 대해 실수 부분와 허수 부분로 나누고, 실수 부분의 심볼과 허수 부분의 심볼에 대해 각각 이산 코사인 변환과 이산 사인 변환을 수행한 후, 고속 푸리에 역변환을 수행함으로써 OFDM 심볼을 생성한다.
신호 수신 장치는 OFDM 심볼에 대해 고속 푸리에 변환을 수행하고, 이산 코사인 역변환과 이산 사인 역변환을 수행한 후, 디지털 복조를 수행함으로써 최종 이진 데이터 심볼을 생성한다.
OFDM, OFDMA, MIMO, DCT, DST, FFTAbstract translation: 公开了在不降低数据传输速率的情况下改善PAPR特性的OFDM信号传输设备和信号接收设备。
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公开(公告)号：KR1020070083180A
公开(公告)日：2007-08-23
申请号：KR1020070012571
申请日：2007-02-07
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2617 , H04L1/0071 , H04L27/2618
Abstract: An apparatus and a method for transmitting data through a resource block are provided to prevent the increase of demodulation errors and decoding errors due to the punching by changing a coding rate and a demodulation rate according to the degree of punching. A method for transmitting data through a resource block includes the steps of: channel-encoding data for a predetermined resource block and generating the encoded data(S130); interleaving the encoded data and generating the interleaved data(S140); digital-modulating the interleaved data and generating the digital-modulated data(S150); punching the digital-modulated data as much as data of a synchronization channel or a broadcast channel for the predetermined resource block and generating the punched data(S160); multiplexing the data of the synchronization channel or the broadcast channel for the predetermined resource block and the punched data for each resource block and generating a multiplexed signal(S170); and transmitting the multiplexed signal(S190).
Abstract translation: 提供了一种通过资源块发送数据的装置和方法，以通过根据冲压程度改变编码率和解调速率来防止解调错误增加和解码错误。 一种通过资源块发送数据的方法包括以下步骤：对预定资源块进行信道编码，生成编码数据（S130）。 交错编码数据并产生交错数据（S140）; 数字调制交错数据并产生数字调制数据（S150）; 将数字调制数据与预定资源块的同步信道或广播信道的数据相冲突，并产生冲孔数据（S160）; 复用用于预定资源块的同步信道或广播信道的数据和每个资源块的穿孔数据并产生多路复用信号（S170）; 并发送多路复用信号（S190）。
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公开(公告)号：KR1020070076372A
公开(公告)日：2007-07-24
申请号：KR1020060082160
申请日：2006-08-29
Applicant: 한국전자통신연구원
CPC classification number: H04B7/2621 , H04B7/005 , H04L27/26 , H04W84/02
Abstract: An apparatus for generating a downlink signal, and a method and an apparatus for restoring data in a cellular system are provided to improve calculating efficiency of a log likelihood ratio for soft decision by getting interference elements and noise elements through orthogonal sequence information included in a pilot signal of the downlink signal. A method for restoring data in a cellular system includes the steps of: Fourier-transforming and equalizing a received signal(S110); detecting a channel coefficient, signal power, and noise power of a plurality of cells from a pilot sub-carrier signal included in a sub frame of the received signal(S120); detecting interference power by using a traffic sub-carrier signal included in the received signal(S130); calculating the dispersion of the received signal by using the detected signal power, interference power, and noise power(S140); and determining a log likelihood ratio and performing soft decision by using the equalized reception signal and the calculated dispersion(S150,S160).
Abstract translation: 提供一种用于生成下行链路信号的装置，以及用于在蜂窝系统中恢复数据的方法和装置，用于通过通过包括在导频中的正交序列信息获得干扰元素和噪声元素来提高用于软判决的对数似然比的计算效率 下行链路信号的信号。 一种用于在蜂窝系统中恢复数据的方法包括以下步骤：对接收信号进行傅里叶变换和均衡（S110）; 从包括在接收信号的子帧中的导频子载波信号中检测多个小区的信道系数，信号功率和噪声功率（S120）; 通过使用包含在接收信号中的业务副载波信号来检测干扰功率（S130）; 通过使用检测的信号功率，干扰功率和噪声功率计算接收信号的色散（S140）; 并且通过使用均衡的接收信号和所计算的色散来确定对数似然比并执行软判决（S150，S160）。
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公开(公告)号：KR1020070073670A
公开(公告)日：2007-07-10
申请号：KR1020070050197
申请日：2007-05-23
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2655 , H04J11/0069 , H04W48/16
Abstract: An apparatus and a method for generating a downlink signal, and an apparatus and a method for searching a cell are provided to estimate a frame synchronization and a cell group search by using a plurality of synchronization patterns formed in one frame. An apparatus for generating a downlink signal includes a pattern generator(110), and a time-frequency mapper(130). The pattern generator(110) generates a synchronization pattern for a plurality of synchronization blocks which form one frame of the downlink signal. The synchronization pattern has a cell group number and start point information of the frame. The plurality of synchronization blocks are a group of a plurality of consecutive sub frames in the frame. The time-frequency mapper(130) generates the downlink signal by mapping the synchronization pattern to a time-frequency domain. The pattern generator(110) generates the synchronization pattern by a combination of a cell group identifying code for identifying a cell group, and a frame synchronization identifying code for indicating a start point of the frame. The synchronization pattern generated by a different code combination is assigned to each of the plurality of synchronization blocks.
Abstract translation: 提供一种用于生成下行链路信号的装置和方法，以及用于搜索小区的装置和方法，以通过使用在一个帧中形成的多个同步模式来估计帧同步和小区组搜索。 用于产生下行链路信号的装置包括模式发生器（110）和时间频率映射器（130）。 模式生成器（110）生成形成下行链路信号的一帧的多个同步块的同步模式。 同步模式具有该帧的单元组编号和起始点信息。 多个同步块是帧中的多个连续子帧的组。 时间映射器（130）通过将同步模式映射到时间 - 频域来生成下行链路信号。 模式生成器（110）通过组合用于识别小区组的小区组识别码和用于指示帧起始点的帧同步识别码来生成同步模式。 由不同的代码组合产生的同步模式被分配给多个同步块中的每一个。
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