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公开(公告)号：KR1020080035992A
公开(公告)日：2008-04-24
申请号：KR1020070105751
申请日：2007-10-19
CPC classification number: H04J11/0069 , H04B7/2643 , H04L27/2662 , H04L27/2678
Abstract: Cell search and BCH(Broadcasting Channel) demodulation methods for an OFDM(Orthogonal Frequency Division Multiplexing) system are provided to obtain the synchronization with low complexity and to offer a simple receiver structure without blind detection due to time ambiguity. A terminal obtains a sync block synchronization and the first sync channel sequence number by the first sync channel symbol included in the received frame(S1200). The boundary and scrambling code group is detected by the sync block synchronization and the second sync channel symbol included in the frame received by the terminal(S1210). A process for obtaining the scrambling code is performed by the first sync channel sequence number and the scrambling code group(S1220). A BCH included in the frame received by the terminal is modulated by the scrambling code so that the information of the wireless communication system is obtained. In the boundary and scrambling code group detection process, the number of BCH antennas or the length of CP(Cyclic Prefix) are obtained.
Abstract translation: 提供用于OFDM（正交频分复用）系统的小区搜索和BCH（广播信道）解调方法以获得低复杂度的同步，并且由于时间模糊性而提供简单的接收机结构而不会盲目检测。 终端通过接收到的帧中包括的第一同步信道符号获得同步块同步和第一同步信道序列号（S1200）。 通过由终端接收的帧中包含的同步块同步和第二同步信道符号来检测边界和扰码组（S1210）。 通过第一同步信道序列号和扰码组来执行用于获得扰码的处理（S1220）。 由终端接收的帧中包括的BCH被扰频调制，从而获得无线通信系统的信息。 在边界和扰码组检测过程中，获得BCH天线的数量或CP的长度（循环前缀）。
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公开(公告)号：KR1020080033055A
公开(公告)日：2008-04-16
申请号：KR1020070081612
申请日：2007-08-14
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2655 , H04J3/0638 , H04L27/2628 , H04W56/00 , H04W84/042
Abstract: An apparatus and a method for synchronization channel transmission in a wireless communication system are provided to increase diversity gain by transmitting two main synchronization channel signals with different beams and using a precoder vector for each frame. A method for synchronization channel transmission includes the steps of: multiplexing a plurality of main synchronization channel signals(S210); and multiplying different first plural precoding vectors by the main synchronization channel signals. The first precoding vectors are perpendicular to each other. The first precoding vectors are different from second precoding vectors used at the time of precoding the main synchronization channel signals at a previous synchronization channel signal transmission time. The first precoding vectors are perpendicular to the second precoding vectors. The precoding vectors are different from third plural precoding vectors used at the time of precoding the main synchronization channel signal in a previous frame.
Abstract translation: 提供了一种用于在无线通信系统中同步信道传输的装置和方法，以通过用不同波束发送两个主同步信道信号并使用每帧的预编码器向量来增加分集增益。 一种用于同步信道传输的方法包括以下步骤：复用多个主同步信道信号（S210）; 以及将不同的第一多个预编码矢量乘以主同步信道信号。 第一预编码矢量彼此垂直。 第一预编码矢量不同于在先前同步信道信号传输时间对主同步信道信号进行预编码时使用的第二预编码矢量。 第一预编码矢量垂直于第二预编码矢量。 预编码矢量不同于在前一帧中预编码主同步信道信号时使用的第三多个预编码矢量。
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公开(公告)号：KR100812351B1
公开(公告)日：2008-03-11
申请号：KR1020060082160
申请日：2006-08-29
Applicant: 한국전자통신연구원
Abstract: 직교 주파수 분할 다중(orthogonal frequency division multiplexing, OFDM) 방식 기반의 셀룰러 시스템의 기지국에서 전송된 신호를 수신한 단말의 데이터 복원 방법을 제공한다. 단말은 수신한 신호를 푸리에 변환하여 등화하고, 수신 신호의 서브프레임에 포함된 파일럿 부반송파 신호로부터 복수의 셀 - 단말이 속한 자기셀과 복수의 인접셀을 포함함 - 의 채널 계수, 신호 전력 및 잡음 전력을 검출한다. 그리고 단말은 수신 신호에 포함된 트래픽 부반송파 신호를 이용하여 간섭 전력을 검출하고, 검출된 신호 전력, 간섭 전력 및 잡음 전력을 이용하여 상기 수신 신호의 분산을 계산한 후, 등화된 수신 신호와 분산값을 이용하여 로그 가능도비를 결정하고, 연판정을 수행하여 수신된 신호를 결정한다.
OFDM, 간섭, 로그 가능도비, 직교 시퀀스, 동기 채널-
194.发明授权
公开(公告)号：KR100809016B1
公开(公告)日：2008-03-03
申请号：KR1020060063050
申请日：2006-07-05
Applicant: 한국전자통신연구원
Abstract: 본 발명은 빔 형성, MIMO, 다이버서티 기법이 결합된 다중 안테나 전송 기술을 이용하는 송신 방법 및 장치에 관한 것이다.
이를 위하여 본 발명은 이동 단말기로 전송할 데이터 채널 신호를 생성하고, 데이터 채널 신호를 전송할 다중 안테나 전송 모드를 결정한 뒤, 데이터 채널 신호, 공통 파일럿 및 제어 신호를 합하여 순방향 신호를 생성하여 사전에 설정된 송신 각도에 따라 이동 단말기로 송출하는 다중 안테나 전송 기술을 이용한 송신 방법을 제공한다. 또한, 본 발명에 따른 다중 안테나 전송 기술을 이용한 송신 방법은 이동 단말기로부터 전송된 순방향 신호에 대한 피드백 신호를 수신하면, 피드백 신호를 이용하여 순방향 신호의 전송을 위한 다중 안테나 전송 모드를 결정한 뒤, 결정된 다중 안테나 전송 모드에 따라 순방향 신호를 생성하여 송출한다.
본 발명에 의하면, 기지국이 MIMO 및 다이버서티와 빔 형성을 간단하게 결합하여 데이터 채널 신호를 이동 단말기로 전송할 수 있으며, 이동 단말기도 다중 안테나 전송 모드를 채널 상황에 따라 용이하게 선택할 수 있다.
빔 형성, MIMO, 다이버서티, 다중 안테나 전송 모드, Beam Forming-
公开(公告)号：KR1020080012151A
公开(公告)日：2008-02-11
申请号：KR1020070072450
申请日：2007-07-19
CPC classification number: H04B7/0604 , H04W74/0833 , H04L27/2636 , H04W48/08
Abstract: A random access method using heterogeneous frequency hopping patterns between cells and a mobile communication device for performing the method are provided to use hopping patterns when an RACH(Random Access Channel) of an MS(Mobile Station) is transmitted, thereby preventing collision of random access bursts between neighboring cells as obtaining a diversity gain in a frequency domain. A receiver(220) receives RACH information on a cell group to which an MS(200) belongs from a base station. A channel allocator(230) allocates channels to RACH bursts based on the RACH information. A transmitter(260) transmits the RACH bursts by the allocated channels. The allocator(230) comprises as follows. A controller(240) extracts random access hopping patterns set in the cell group from the transmitted burst information, and selects sub channels to which the bursts are to be transmitted according to the extracted patterns. An OFDMA(Orthogonal Frequency Division Multiple Access) modulator(250) allocates the sub channels to the bursts, and OFDMA-modulates the bursts.
Abstract translation: 提供了一种在小区之间使用异构跳频模式的随机接入方法和用于执行该方法的移动通信设备，以便在发送MS（移动台）的RACH（随机接入信道）时，使用跳频模式，从而防止随机接入的冲突 在相邻小区之间突发，以获得频域中的分集增益。 接收机（220）从基站接收关于MS（200）所属的小区组的RACH信息。 信道分配器（230）基于RACH信息将信道分配给RACH突发。 发射机（260）通过所分配的信道发送RACH脉冲串。 分配器（230）包括如下。 控制器（240）从发送的脉冲串信息中提取在单元组中设置的随机接入跳变模式，并且根据提取的模式选择要发送脉冲串的子信道。 OFDMA（正交频分多址）调制器（250）将子信道分配给脉冲串，并且OFDMA调制脉冲串。
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Patent Agency Ranking
公开(公告)号：KR1020080010344A
公开(公告)日：2008-01-30
申请号：KR1020070074705
申请日：2007-07-25
Applicant: 한국전자통신연구원
CPC classification number: H04W56/001 , H04J11/0069 , H04J11/0093 , H04L5/0037 , H04L5/005 , H04L5/0053 , H04L27/2613 , H04L27/2655 , H04L27/2675 , H04W36/0061 , H04W36/08 , H04W56/00 , H04J11/0073 , H04J11/0076
Abstract: A forward link frame transmission method, a cell search method, an apparatus using the same and a forward link frame structure are provided to obtain low complexity and to reduce the cell search time of a mobile station in an OFDM(Orthogonal Frequency Division Multiplexing) cellular system. A forward link frame transmission method includes the steps of: generating a frame composed of a plurality of sync blocks; and transmitting the frame through a forward link. The frame includes a primary synchronization channel sequence to provide sync block timing information and a plurality of secondary synchronization channel sequences to provide frame timing information. A cell identifier(40) is specified by the combination of the primary synchronization channel sequence and a hopping codeword specified by the plurality of second synchronization channel sequences.
Abstract translation: 提供前向链路帧发送方法，小区搜索方法，使用该方法的装置和前向链路帧结构，以获得低复杂度并减少移动台在OFDM（正交频分复用）蜂窝中的小区搜索时间 系统。 前向链路帧传输方法包括以下步骤：产生由多个同步块组成的帧; 并通过前向链路发送帧。 该帧包括提供同步块定时信息的主同步信道序列和多个次同步信道序列以提供帧定时信息。 小区标识符（40）由主同步信道序列和由多个第二同步信道序列指定的跳频码字的组合来指定。
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公开(公告)号：KR1020080009639A
公开(公告)日：2008-01-29
申请号：KR1020070072159
申请日：2007-07-19
CPC classification number: H04L7/0008 , H04L27/2656 , H04L27/2666
Abstract: A method for transmitting a downlink frame in a wireless communication system is provided to improve cell search performance by placing main and sub synchronization channels adjacent to the boundary of a sub frame. A method for transmitting a downlink frame in a wireless communication system includes the step of: generating a first synchronization channel by inserting a first guard interval into a first synchronization channel signal; generating a second synchronization channel by inserting a second guard interval into a second synchronization channel signal; arranging the first synchronization channel in the downlink frame to place the first synchronization channel at the front of the boundary of the sub frame; and arranging the second synchronization channel in the downlink frame to place the second synchronization channel at the rear of the boundary of the sub frame. One of the first and second synchronization channels is a main synchronization channel, and the other is a sub synchronization channel.
Abstract translation: 提供了一种用于在无线通信系统中发送下行链路帧的方法，通过将主和副同步信道放置在子帧的边界附近来提高小区搜索性能。 一种用于在无线通信系统中发送下行链路帧的方法包括以下步骤：通过将第一保护间隔插入到第一同步信道信号中来产生第一同步信道; 通过将第二保护间隔插入到第二同步信道信号中来产生第二同步信道; 在下行链路帧中布置第一同步信道以将第一同步信道置于子帧的边界的前面; 以及在所述下行链路帧中布置所述第二同步信道以将所述第二同步信道置于所述子帧的边界的后面。 第一和第二同步信道中的一个是主同步信道，另一个是子同步信道。
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公开(公告)号：KR1020080005104A
公开(公告)日：2008-01-10
申请号：KR1020070067506
申请日：2007-07-05
IPC: H04B7/26
CPC classification number: H04L27/2634 , H04B7/022 , H04L27/2613 , H04L27/2655 , H04B7/0615
Abstract: A method and an apparatus for transmitting a signal in a communication system are provided to reduce the reception error of the same signal in a terminal by applying weight patterns different from each other to a common signal. A method for transmitting a signal in a communication system comprises the following steps of: setting a weight according to a weight pattern determined by the transmission time of a common signal and a pattern number allocated to a first BS(Base Station); multiplying the common signal by the weight to generate a transmission signal(S420); and transmitting the transmission signal(S440). The common signal is generated by a sequence allocated in common to the first BS and a second BS.
Abstract translation: 提供一种用于在通信系统中发送信号的方法和装置，用于通过对公共信号施加彼此不同的加权模式来减少终端中相同信号的接收错误。 一种用于在通信系统中发送信号的方法包括以下步骤：根据由公共信号的发送时间和分配给第一BS（基站）的模式号确定的权重模式来设置权重; 将公共信号乘以权重以产生发送信号（S420）; 并发送发送信号（S440）。 公共信号由对第一BS和第二BS共同分配的序列产生。
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公开(公告)号：KR1020070103703A
公开(公告)日：2007-10-24
申请号：KR1020070038148
申请日：2007-04-19
Applicant: 한국전자통신연구원
CPC classification number: H04W52/42 , H04B7/0617 , H04B7/0623 , H04B7/0689 , H04B7/12 , H04L1/0001 , H04L1/0006 , H04L1/06 , H04L1/1867 , H04L1/188 , H04L1/1893 , H04L5/0053 , H04L5/023 , H04L27/2626 , H04W52/286 , H04W52/48 , H04W74/085 , H04W74/0866
Abstract: A transmission method of a mobile station is provided to enlarge an uplink cell coverage by adopting a switching diversity while detecting an RACH(Random Access CHannel). An OFDMA(Orthogonal Frequency Division Multiple Access) modulating unit(110) allocates an RACH burst into a specific subband, modulates the result, and generates an RACH burst signal. A beam forming unit(120) processes the RACH burst signal from the OFDMA modulating unit according to a predetermined beam forming pattern and transmits a generated beam to multiple reception antennas. A controlling unit(130) includes a subband controller(131), a beam forming pattern controller(132), and a power controller(133). The subband controller generates a first control signal for controlling a subband, which is allocated to the RACH burst. The beam forming pattern controller generates a second control signal for controlling the beam forming pattern of the RACH burst signal. The power controller generates a third control signal for controlling a transmission power of the RACH burst signal.
Abstract translation: 提供移动台的发送方法，通过在检测到RACH（随机接入信道）的同时采用切换分集来扩大上行链路小区覆盖。 OFDMA（正交频分多址）调制部（110）将RACH脉冲串分配给特定的子带，对结果进行调制，生成RACH脉冲串信号。 波束形成单元（120）根据预定的波束形成模式处理来自OFDMA调制单元的RACH脉冲串信号，并将生成的波束发送到多个接收天线。 控制单元（130）包括子带控制器（131），波束形成模式控制器（132）和功率控制器（133）。 子带控制器产生用于控制分配给RACH突发的子带的第一控制信号。 波束形成模式控制器产生用于控制RACH脉冲串信号的波束形成模式的第二控制信号。 功率控制器产生用于控制RACH突发信号的发送功率的第三控制信号。
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200.发明公开송신 다이버시티가 적용된 ＯＦＤＭ 시스템에서 동기채널을 이용하여 브로드캐스팅 채널을 복조하는 방법 및이를 위한 송수신 장치 无效通过在OFDM系统中使用同步信道和发射/接收设备来解调广播信道的方法
公开(公告)号：KR1020070066871A
公开(公告)日：2007-06-27
申请号：KR1020060120716
申请日：2006-12-01
Applicant: 한국전자통신연구원 , 주식회사 케이티 , 에스케이텔레콤 주식회사
CPC classification number: H04L27/2655 , H04B7/06 , H04L5/0007 , H04L27/2602
Abstract: A method for demodulating a broadcast channel by using a synchronization channel at an OFDM(Orthogonal Frequency Division Modulation) system with transmit diversity and transmitting/receiving device therefor are provided to reduce error occurrence in BCH(Broadcasting Channel) frame by coherent-demodulating the BCH through a synchronization signal. A transmitting/receiving device for demodulating a broadcast channel by using a synchronization channel at an OFDM system with transmission diversity includes the rest channel demodulator(530), a cell searcher(550), a channel estimator(572), and a BHC coherent demodulator and combiner(580). The other channel demodulator receives other channel except synchronous channel and BCH channel. The cell searcher(550) performs a cell search. The channel estimator(572) estimates first and second channels for first and second receiving antennas(500,502) respectively. The BHC coherent demodulator and combiner(580) performs coherent demodulation of BCH for each receiving antenna path and combines the BCH.
Abstract translation: 提供一种通过在具有发射分集的OFDM（正交频分调制）系统和其发射/接收装置的OFDM（正交频分调制）系统中使用同步信道来解调广播信道的方法，以通过相干解调BCH（广播信道）帧来减少BCH 通过同步信号。 用于通过在具有发射分集的OFDM系统中使用同步信道来解调广播信道的发送/接收装置包括休息信道解调器（530），小区搜索器（550），信道估计器（572）和BHC相干解调器 和组合器（580）。 另一个信道解调器接收除了同步信道和BCH信道之外的其他信道。 小区搜索器（550）执行小区搜索。 信道估计器（572）分别估计第一和第二接收天线（500,502）的第一和第二信道。 BHC相干解调器和组合器（580）对每个接收天线路径执行BCH的相干解调并组合BCH。
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