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公开(公告)号：KR1020080044793A
公开(公告)日：2008-05-21
申请号：KR1020070117200
申请日：2007-11-16
Applicant: 한국전자통신연구원
CPC classification number: H04L5/0053 , H04L5/0007 , H04L25/0202 , H04L1/0031
Abstract: A method for generating and transmitting a down-link frame is provided to improve reception quality of BCH information without increasing complexity of a mobile station. A plurality of synchronous channel symbols and a plurality of broadcasting channel symbols are arranged adjacently to a time axis. A plurality of down-link frames corresponding to a plurality of antennas are generated by applying pre-coding vectors to the synchronous channel symbols and broadcasting channel symbols. The pre-coding vectors are changed according to sectors to which the down-link frames are transmitted. The pre-coding vectors are further changed according to sectors on which the broadcasting channel symbols are positioned. The pre-coding vectors are independently of indexes of sub-carriers.
Abstract translation: 提供用于生成和发送下行链路帧的方法，以提高BCH信息的接收质量，而不增加移动台的复杂性。 多个同步信道符号和多个广播信道符号被布置成与时间轴相邻。 通过将预编码矢量应用于同步信道符号和广播信道符号来生成对应于多个天线的多个下行链路帧。 预编码向量根据下行链路帧发送的扇区而改变。 根据广播信道符号所在的扇区进一步改变预编码矢量。 预编码矢量独立于子载波的索引。
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公开(公告)号：KR1020080042676A
公开(公告)日：2008-05-15
申请号：KR1020070095208
申请日：2007-09-19
Applicant: 한국전자통신연구원
CPC classification number: H04B7/0456 , H04B7/0634 , H04B7/0639 , H04L25/03343
Abstract: A data transmission method is provided to generate precoding vector groups including precoding vectors crossing each other and transmit data by using the precoding vectors included in the precoding vector groups, thereby improving diversity gain. A data transmission method comprises the following steps of: generating plural precoding vector groups including plural precoding vectors crossing adjacent precoding vectors(S101); determining a precoding vector group including the plural precoding vector groups(S102); and transmitting data by switching the precoding vectors included in the precoding vector group(S103).
Abstract translation: 提供数据传输方法来产生包括彼此交叉的预编码矢量的预编码矢量组，并且通过使用预编码矢量组中包括的预编码矢量来发送数据，从而提高分集增益。 数据传输方法包括以下步骤：产生包括与相邻预编码矢量交叉的多个预编码矢量的多个预编码矢量组（S101）; 确定包括所述多个预编码矢量组的预编码矢量组（S102）; 以及通过切换包含在预编码矢量组中的预编码矢量来发送数据（S103）。
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公开(公告)号：KR1020080040553A
公开(公告)日：2008-05-08
申请号：KR1020070072149
申请日：2007-07-19
IPC: H04B7/26
CPC classification number: H04W72/0413 , H04W72/0453 , H04W72/085
Abstract: A source allocation requesting method and a resource allocation method are provided to allow a BS(Base Station) to preferentially allocate verified resources to a mobile terminal which is in a bad channel state. An MS(Mobile Station) measures CQI(Channel Quality Information) by using a common pilot signal transmitted from a BS(S101). The measured CQI is included in an RACH(Random Access Channel) preamble and transmitted to the BS(S102). The MS checks whether or not the BS has normally received the RACH preamble(S103). When an RACH response message is received from the BS, the MS checks whether resource allocation information included in the RACH response message indicates that a frequency band that was used for transmitting the preamble has been allocated(S105). If a frequency band different from the frequency band used for transmitting the RACH preamble has been allocated, the MS extracts resource allocation information from the RACH response message(S106) and transmits the first uplink message by using a frequency band corresponding to the resource allocation information(S107).
Abstract translation: 提供源分配请求方法和资源分配方法以允许BS（基站）优先地将经过验证的资源分配给处于不良信道状态的移动终端。 MS（移动站）通过使用从BS发送的公共导频信号来测量CQI（信道质量信息）（S101）。 所测量的CQI包括在RACH（随机接入信道）前同步码中，并发送给BS（S102）。 MS检查BS是否正常接收到RACH前导码（S103）。 当从BS接收到RACH响应消息时，MS检查包括在RACH响应消息中的资源分配信息是否已经分配了用于发送前同步码的频带（S105）。 如果已经分配了与用于发送RACH前导码的频带不同的频带，则MS从RACH响应消息中提取资源分配信息（S106），并且通过使用与资源分配信息对应的频带来发送第一上行链路消息 （S107）。
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公开(公告)号：KR1020080035498A
公开(公告)日：2008-04-23
申请号：KR1020070105209
申请日：2007-10-18
CPC classification number: H04J11/0069 , H04L5/0007 , H04L5/0023 , H04L5/0048 , H04L25/0204 , H04L25/0226 , H04L25/0228 , H04L25/03866 , H04L27/261 , H04L27/2613 , H04L27/2656 , H04L27/2657 , H04L27/2675 , H04W56/0085 , Y02D70/00 , Y02D70/1262 , H04W48/16
Abstract: A cell search method in an OFDM(Orthogonal Frequency Division Multiplexing) cellular system including primary and secondary synchronous channels formed according to TDM(Time Division Multiplexing) is provided to smoothly perform handover by effectively searching an adjacent cell and reduce power consumption of a battery of a mobile station. A sync block synchronization is acquired(S1200). A frame boundary and scrambling code group, the number of BCH(Broadcasting Channel) antennas, and whether or not a pilot hopping has been performed are detected(S1210). Scrambling codes of a group are detected based on the acquired information by using a pilot symbol(S1220). A BCH is coherent-demodulated by using the acquired scrambling codes(S1230). It is checked whether or not a CRC(Cyclic Redundancy Check) error occurs(S1240).
Abstract translation: 提供了包括根据TDM（时分多路复用）形成的主同步信道和辅同步信道的OFDM（正交频分复用）蜂窝系统中的小区搜索方法，以通过有效地搜索相邻小区来平滑地执行切换，并且降低电池的功率消耗 一个移动台。 获取同步块同步（S1200）。 检测帧边界和扰码组，BCH（广播信道）天线的数量以及是否执行了导频跳频（S1210）。 基于通过使用导频符号获取的信息来检测组的加扰码（S1220）。 通过使用所获取的扰码对BCH进行相干解调（S1230）。 检查是否发生CRC（循环冗余校验）错误（S1240）。
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公开(公告)号：KR1020080031619A
公开(公告)日：2008-04-10
申请号：KR1020070095207
申请日：2007-09-19
Applicant: 한국전자통신연구원
CPC classification number: H04L7/0091 , H04B7/0617 , H04L7/10 , H04W56/0015
Abstract: A method for transmitting an SCH(Synchronization Channel) signal is provided to improve a beam forming gain by applying the same precoding vector to a plurality of SCH symbols included in at least one frame. A method for transmitting an SCH signal includes the steps of: generating a precoding vector group including a plurality of precoding vectors with a precoding vector orthogonal to an adjacent precoding vector(S101); and transmitting the SCH signal by using the precoding vector group(S103). The maximum number of the precoding vectors included in the precoding vector group corresponds to lengths of the precoding vectors. The number of the precoding vectors included in the precoding vector group is the number of SCH symbols included in at least one frame.
Abstract translation: 提供一种用于发送SCH（同步信道）信号的方法，以通过将相同的预编码矢量应用于至少一帧中所包括的多个SCH符号来提高波束形成增益。 一种用于发送SCH信号的方法包括以下步骤：产生包括具有与相邻预编码矢量正交的预编码矢量的多个预编码矢量的预编码矢量组（S101）; 并通过使用预编码矢量组发送SCH信号（S103）。 包含在预编码矢量组中的预编码矢量的最大数量对应于预编码矢量的长度。 包含在预编码矢量组中的预编码矢量的数量是包括在至少一帧中的SCH符号的数量。
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Patent Agency Ranking
公开(公告)号：KR1020080023162A
公开(公告)日：2008-03-12
申请号：KR1020070090472
申请日：2007-09-06
Applicant: 한국전자통신연구원
CPC classification number: H04L5/0032 , H04L5/0007 , H04L27/2647
Abstract: A method for transmitting signals and a method for receiving signals are provided to solve the unbalance of performance at the boundary between sectors in an identical cell by allocating sector-by-sector phase rotation values in the case of demodulating BCH(Broadcast CHannel) information, incoming from the sectors, using a delay diversity technique. In case a cell includes 3 sectors, a code application part in each of the sectors divides resources for BCH symbol transmission into the first through third resource groups(351-353). Each code application part allocates respectively different phase rotation values to the first through third resource groups(351-353). In other words, the phase rotation value of each of the resource groups(351-353) is differently set for each of the sectors. For example, for the first sector, the first through third phase rotation values respectively are allocated to the first through third resource groups(351-353).
Abstract translation: 提供一种用于发送信号的方法和用于接收信号的方法，用于通过在解调BCH（广播信道）信息的情况下分配逐个扇区相位旋转值来解决相同小区中扇区边界的性能不平衡， 使用延迟分集技术从扇区传入。 在小区包括3个扇区的情况下，每个扇区中的代码应用部分将用于BCH符号传输的资源划分到第一至第三资源组（351-353）中。 每个代码应用部分分别将不同的相位旋转值分配给第一至第三资源组（351-353）。 换句话说，对于每个扇区，不同地设定每个资源组（351-353）的相位旋转值。 例如，对于第一扇区，分别将第一至第三相位旋转值分配给第一至第三资源组（351-353）。
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公开(公告)号：KR1020080022065A
公开(公告)日：2008-03-10
申请号：KR1020070089928
申请日：2007-09-05
CPC classification number: H04J11/0073 , H04J11/0076 , H04L7/0008 , H04L27/2656 , H04W56/001
Abstract: A structure of a synchronization channel in an OFDM(Orthogonal Frequency Division Multiplexing) cellular mobile communication system is provided to improve a frequency error tracking performance of a terminal by increasing the number of repetition patterns in a secondary synchronous channel signal. A frame is formed by using plural symbols. The frame is transmitted through a forward link. The frame includes a primary SCH(Synchronous Channel) and a secondary SCH which are classified according to a frequency in the symbol at the same time. A cell ID is specified by a pattern in a code number which is detected by using the main and secondary synchronous channels. The primary synchronous channels are allocated at predetermined intervals according to the frequency in the symbol. The secondary synchronous channel is allocated in the frequency in the non-allocated symbol, so that more secondary SCHs are allocated in the symbol than the main synchronous channels.
Abstract translation: 提供了OFDM（正交频分复用）蜂窝移动通信系统中的同步信道的结构，以通过增加辅同步信道信号中的重复模式的数量来改善终端的频率误差跟踪性能。 通过使用多个符号形成帧。 帧通过前向链路传输。 帧包括主SCH（同步信道）和辅SCH，它们根据符号中的频率被同时分类。 小区ID由通过使用主和辅同步信道检测到的码号中的模式指定。 根据符号中的频率，以预定间隔分配主同步信道。 次同步信道在未分配符号中以频率分配，使得在符号中比主同步信道更多的次SCH被分配。
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公开(公告)号：KR1020080020472A
公开(公告)日：2008-03-05
申请号：KR1020070072179
申请日：2007-07-19
Applicant: 한국전자통신연구원
CPC classification number: H04L5/005 , H04B1/707 , H04B2001/70724
Abstract: A method and an apparatus for transmitting a downlink pilot signal in a mobile communication system are provided to enable a BS(Base Station) to change a scrambling code allocated to each sector and change an interference sector in each sub frame and randomize interference between the sectors, thereby preventing the continuous deterioration of channel estimation capability generated by the multiple path of the interference sector. A method for transmitting a downlink pilot signal in a mobile communication system comprises the following steps of: generating and transmitting a first downlink pilot signal corresponding to a first sector; generating and transmitting a second downlink pilot signal which corresponds to a second sector and is different from the first downlink pilot signal; and differently generating the first downlink pilot signal and the second downlink pilot signal in each sub frame.
Abstract translation: 提供一种用于在移动通信系统中发送下行链路导频信号的方法和装置，以使BS（基站）可以改变分配给每个扇区的扰频码，并改变每个子帧中的干扰扇区，并随机化两个扇区之间的干扰 ，从而防止由干扰扇区的多路径产生的信道估计能力的持续恶化。 一种用于在移动通信系统中发送下行链路导频信号的方法包括以下步骤：生成和发送对应于第一扇区的第一下行链路导频信号; 产生和发送对应于第二扇区并且不同于第一下行链路导频信号的第二下行链路导频信号; 并且在每个子帧中不同地生成第一下行链路导频信号和第二下行链路导频信号。
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69.发明授权공간/코드블록코딩 송신 다이버시티 장치 및 그 방법, 그를 이용한 ＣＤＭＡ다이버시티 송신기와, 그에 따른 ＣＤＭＡ이동국 수신기 失效空间码块编码发射分集的装置和方法，使用它的CDMA分集发射机，根据它们的CDMA移动台接收机
公开(公告)号：KR100790359B1
公开(公告)日：2008-01-02
申请号：KR1020050048940
申请日：2005-06-08
Applicant: 한국전자통신연구원
IPC: H04J13/12 , H04B7/06 , H04B1/7097
CPC classification number: H04L1/0631 , H04B1/707 , H04J13/12 , H04L1/0643
Abstract: 1. 청구범위에 기재된 발명이 속한 기술분야
본 발명은 공간/코드블록코딩 송신 다이버시티 장치 및 그 방법, 그를 이용한 CDMA 다이버시티 송신기와, 그에 따른 CDMA 이동국 수신기에 관한 것임.
2. 발명이 해결하려고 하는 기술적 과제
본 발명은 CDMA 통신시스템에서 하나의 심볼 구간 내에서 송신 다이버시티가 이루어지게 함으로써 무선채널 환경에서 시스템 성능을 향상시킬 수 있게 하는 공간/코드블록코딩(SCBC) 송신 다이버시티 장치 및 그 방법과 그를 이용한 CDMA 다이버시티 송신기, 그리고 송신 다이버시티 신호를 수신하는 CDMA 이동국 수신기를 제공하는데 그 목적이 있음.
3. 발명의 해결방법의 요지
본 발명은, CDMA 통신시스템에서 공간/코드블록코딩(SCBC)을 이용한 송신 다이버시티 장치에 있어서, 하나의 변조심볼구간 동안에 입력되는 복수의 변조심볼에 대하여 공간/코드블록코딩(SCBC) 방식을 적용하여 소정의 개수의 서로 다른 송신데이터를 생성하기 위한 인코딩 수단; 직교코드를 발생시키기 위한 직교코드 발생 수단; 상기 직교코드 발생 수단에서 발생시킨 직교코드를 이용하여 상기 인코딩 수단에서 생성한 각각의 송신데이터를 확산시키기 위한 확산 수단; 및 하나의 변조심볼구간 내에서 송신 다이버시티가 이루어질 수 있도록, 상기 확산 수단에서 확산시킨 송신데이터들을 결합하여 하나의 변조심볼구간에서 송신안테나 경로별로 출력하기 위한 결합 수단을 포함함.
4. 발명의 중요한 용도
본 발명은 CDMA 시스템에서의 송신 다이버시티 등에 이용됨.
MC-CDMA, DS-CDMA, 송신 다이버시티, 공간/코드블록코딩, SCBC-
公开(公告)号：KR100788892B1
公开(公告)日：2007-12-27
申请号：KR1020060136320
申请日：2006-12-28
Applicant: 한국전자통신연구원
Abstract: 하향링크 신호 생성 장치와 셀 탐색 장치가 개시된다.
하향링크 신호 생성 장치는 시간 영역에서 복수의 반복 패턴이 형성되도록 주파수 영역의 하향링크 프레임의 동기 구간에 소정의 셀에 해당하는 셀 그룹 식별 시퀀스를 배치하고, 주파수 영역의 하향링크 프레임을 시간 영역 신호로 변환한다. 그리고 하향링크 신호 생성 장치는 시간 영역 신호에서 프레임 동기 식별 시퀀스를 구성하는 복수의 직교 인식 코드를 복수의 반복 패턴에 각각 곱하여 하향링크 신호를 생성한다.
셀 탐색 장치는 2개의 직교 인식 코드로 구성되는 프레임 동기 식별 시퀀스를 수신 신호에 곱하고, 곱해진 신호와 곱해진 신호의 지연 신호를 상관하여, 상관 결과의 크기가 소정의 레벨 이상이 되는 시점을 찾아 심볼 동기와 프레임 동기를 결정하여 셀 탐색을 수행한다.
프레임, 동기, 셀 탐색, 셀 그룹, 하향링크 신호
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