公开(公告)号：KR1020080079577A

公开(公告)日：2008-09-01

申请号：KR1020070118511

申请日：2007-11-20

Applicant: 한국전자통신연구원

Inventor： 장갑석 ,  박형근 ,  고영조 ,  이효석 ,  김일규 ,  김영훈 ,  방승찬

IPC: H04B7/06 ,  H04B15/00 ,  H04B7/26

CPC classification number: H04L1/0618 ,  H04B7/0613 ,  H04B7/0697 ,  H04L1/0031 ,  H04L27/2662

Abstract: A signal transmission method is provided to be capable of magnifying a diversity gain within a transmission time interval of broadcasting channel information by applying a cyclic delay diversity method to the broadcasting channel information, as efficiently removing interference. Plural cyclic delay values individually corresponding to plural transmission antennas are set(S201-S207). The plural cyclic delay values are individually applied to plural broadcasting channel symbols(S209). The plural broadcasting channel symbols are transmitted through the plural transmission antennas(S211). The cyclic delay values are determined according to time assigned with the broadcasting channel symbols.

Abstract translation: 提供了一种信号传输方法，其能够通过对广播信道信息应用循环延迟分集方法来扩大广播信道信息的传输时间间隔内的分集增益，从而有效地去除干扰。 分别对应于多个发送天线的多个循环延迟值被设定（S201〜S207）。 多个循环延迟值分别应用于多个广播信道符号（S209）。 通过多个发送天线发送多个广播信道符号（S211）。 根据分配有广播频道符号的时间确定循环延迟值。

公开(公告)号：KR1020080071065A

公开(公告)日：2008-08-01

申请号：KR1020070132635

申请日：2007-12-17

Applicant: 한국전자통신연구원 ,  삼성전자주식회사

Inventor： 김일규 ,  장갑석 ,  박형근 ,  고영조 ,  이효석 ,  이준환 ,  김영훈 ,  방승찬

IPC: H04B7/02 ,  H04L27/26 ,  H04J11/00 ,  H04L1/00

CPC classification number: H04B1/707 ,  H04B7/02 ,  H04L5/0053 ,  H04L27/2626

Abstract: A transmission diversity method for a forward link channel in a wireless communication system and a signal processing method are provided to improve transmission diversity for an MC-CDMA(Multi-Carrier Code Division Multiple Access) type channel in an OFDM(Orthogonal Frequency Division Multiplexing)-based downlink by being used to ACK/NACK channels. Predetermined different output symbols are generated from plural input symbols at one random modulation symbol interval(S900). Orthogonal codes are generated(S910). The output symbols are spread by using the orthogonal codes. The spread output symbols are crossed together as being combined, and the combined output symbols are outputted to each transmission path.

Abstract translation: 提供了一种用于无线通信系统中的前向链路信道的传输分集方法和信号处理方法，以改善OFDM（正交频分复用）中的MC-CDMA（多载波码分多址）类型信道的传输分集， 的下行链路用于ACK / NACK信道。 以一个随机调制符号间隔从多个输入符号生成预定的不同输出符号（S900）。 生成正交码（S910）。 输出符号通过使用正交码进行扩展。 扩展输出符号被组合在一起，并且组合的输出符号被输出到每个传输路径。

公开(公告)号：KR1020080066467A

公开(公告)日：2008-07-16

申请号：KR1020070003952

申请日：2007-01-12

Applicant: 한국전자통신연구원 ,  삼성전자주식회사

Inventor： 이효석 ,  김일규 ,  고영조 ,  장갑석 ,  박형근 ,  김영훈 ,  방승찬

IPC: H04L27/26 ,  H04J11/00 ,  H04B7/26 ,  H04L29/02

CPC classification number: H04W74/08 ,  H04L5/0007 ,  H04L27/26 ,  H04L27/2672

Abstract: A method for multiplexing a random access preamble for a low speed mobile station and a random access preamble for a high speed mobile station based on a frequency axis is provided to reduce interference between mobile stations by multiplexing a random access band based on a frequency axis in an uplink of a cellular system. A method for multiplexing a random access preamble for a low speed mobile station and a random access preamble for a high speed mobile station based on a frequency axis includes the steps of: multiplexing a random access band using a preamble(100) which is used in a mobile station of a high speed, and a random access band using a preamble(110) which is used in a mobile station of a low speed on a frequency band. All of the mobile station of a high speed and the mobile station of a low speed perform easily a random access by allocating the different number of random access band using the preamble which is used in the mobile station of the high speed and random access band using the preamble which is used in the mobile station of the low speed to the cell based on the characteristics of the cell.

Abstract translation: 提供一种用于基于频率轴多路复用低速移动站的随机接入前同步码和高速移动台的随机接入前导码的方法，以通过基于频率轴的随机接入频带复用随机接入频带来减少移动台之间的干扰 蜂窝系统的上行链路。 一种用于低速移动台的随机接入前导码和基于频率轴的高速移动台的随机接入前同步码的方法包括以下步骤：使用前导码（100）多路复用随机接入频带 高速移动站和使用在频带上的低速移动站中使用的前导码（110）的随机接入频带。 所有高速移动站和低速移动站均通过使用在高速和随机接入频带的移动台中使用的前同步码分配不同数量的随机接入频带来轻松执行随机接入，所述前导码使用 基于小区的特性，在低速小区的移动站中使用的前导码。

公开(公告)号：KR1020080045601A

公开(公告)日：2008-05-23

申请号：KR1020070072175

申请日：2007-07-19

Applicant: 한국전자통신연구원 ,  삼성전자주식회사

Inventor： 이효석 ,  김일규 ,  고영조 ,  장갑석 ,  박형근 ,  김영훈 ,  방승찬

IPC: H04B7/14 ,  H04B7/155 ,  H04L27/26 ,  H04J11/00

CPC classification number: H04W74/08 ,  H04B7/0617 ,  H04B7/0639 ,  H04B7/12

Abstract: A random access method and a random access response method are provided to enable a base station to perform beam forming of response data for a random access response message or a first uplink message by using fed-back precoding vector information and transmit the data, thereby improving reliability of a base station response. A random access method comprises the following steps of: transmitting at least one broadcasting signal; receiving an index of a precoding vector, selected based on at least broadcasting signal among plural precoding vectors, from a mobile station(S105); and transmitting a response to random access of the mobile station by using the selected precoding vector(S106).

Abstract translation: 提供了一种随机接入方法和随机接入响应方法，使得基站能够通过使用反馈预编码向量信息并发送数据来对随机接入响应消息或第一上行链路消息执行响应数据的波束形成，由此改善 基站响应的可靠性。 随机接入方法包括以下步骤：发送至少一个广播信号; 从移动台接收至少基于多个预编码矢量中的广播信号选择的预编码矢量的索引（S105）; 以及通过使用所选择的预编码向量来发送对所述移动站的随机接入的响应（S106）。

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

Inventor： 장갑석 ,  김일규 ,  박형근 ,  고영조 ,  이효석 ,  김영훈 ,  방승찬

IPC: H04L7/033 ,  H04L7/10 ,  H04B7/155 ,  H04B7/26

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。

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

Inventor： 박형근 ,  김일규 ,  고영조 ,  장갑석 ,  이효석 ,  김영훈 ,  방승찬

IPC: H04B7/02 ,  H04L1/02

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）。

公开(公告)号：KR1020080040553A

公开(公告)日：2008-05-08

申请号：KR1020070072149

申请日：2007-07-19

Applicant: 한국전자통신연구원 ,  삼성전자주식회사

Inventor： 이효석 ,  김일규 ,  고영조 ,  장갑석 ,  박형근 ,  김영훈 ,  방승찬

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）。

公开(公告)号：KR1020080035498A

公开(公告)日：2008-04-23

申请号：KR1020070105209

申请日：2007-10-18

Applicant: 한국전자통신연구원 ,  삼성전자주식회사

Inventor： 김일규 ,  박형근 ,  장갑석 ,  고영조 ,  이효석 ,  이준환 ,  김영훈 ,  방승찬

IPC: H04B7/26 ,  H04L27/26

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）。

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

Inventor： 박형근 ,  고영조 ,  김일규 ,  장갑석 ,  이효석 ,  김영훈 ,  방승찬

IPC: H04L7/10 ,  H04B7/02 ,  H04L27/26 ,  H04J11/00

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。

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

Inventor： 장갑석 ,  박형근 ,  김일규 ,  고영조 ,  이효석 ,  김영훈 ,  방승찬

IPC: H04B7/26 ,  H04L27/26 ,  H04L27/10

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）。