公开(公告)号：WO2007066871A3

公开(公告)日：2010-11-11

申请号：PCT/KR2006002924

申请日：2006-07-25

Applicant: KOREA ELECTRONICS TELECOMM ,  LIM HYUNG-SOO ,  LEE YU-RO ,  KWON DONG-SEUNG

Inventor： LIM HYUNG-SOO ,  LEE YU-RO ,  KWON DONG-SEUNG

IPC: H04L27/26 ,  H04J13/00 ,  H04J13/18 ,  H04L5/02

CPC classification number: H04L5/0021 ,  H04J13/0048 ,  H04J13/18 ,  H04L5/0007 ,  H04L5/0039 ,  H04L5/0064 ,  H04L5/0073

Abstract: The present invention relates to a method for allocating a frequency domain spread code in a base station of a multi-carrier code division multiple access (MC-CDMA) communication system. A code allocation priority is established based on interference between previously allocated spread codes and a newly allocated spread code so as to minimize the interference caused by channel fading or a synchronization error according to a transmitting or receiving timing offset when a scheduler of the base station in the MC-CDMA communication system allocates a subcarrier group to the plurality of user terminals or channels, and the spread code is allocated to the plurality of user terminals or channels according to the established priority, by the scheduler of the base station.

Abstract translation: 本发明涉及一种在多载波码分多址（MC-CDMA）通信系统的基站中分配频域扩频码的方法。 基于先前分配的扩展码和新分配的扩展码之间的干扰建立码分配优先级，以便当基站的调度器处于发送或接收定时偏移时，根据发送或接收定时偏移最小化由信道衰落或同步误差引起的干扰 MC-CDMA通信系统向多个用户终端或信道分配子载波组，并且由基站的调度器根据建立的优先级将扩频码分配给多个用户终端或信道。

公开(公告)号：WO2010024603A2

公开(公告)日：2010-03-04

申请号：PCT/KR2009/004785

申请日：2009-08-27

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  KWON, Dong Seung ,  KWAK, Byung-Jae ,  PARK, Bum-Soo

Inventor： KWON, Dong Seung ,  KWAK, Byung-Jae ,  PARK, Bum-Soo

CPC classification number: H04L1/1893 ,  H04L1/0003 ,  H04L1/1816 ,  H04L1/1819 ,  H04L1/1887

Abstract: A retransmission method maps at least some bits of codeword to symbols according to a first modulation method at the time of first transmission. The retransmission method maps at least some bits of the codeword to symbols according to a second modulation method that is different from the first modulation method at the time of second transmission after the first transmission. In this case, the second modulation method may have a lower modulation order than that of the first modulation method, or a sum of average reliability per bit of symbol according to the second modulation may be larger than a sum of average reliability per bit of symbol according to the first modulation method.

Abstract translation: 在第一次发送时，重发方法将码字的至少一些比特根据第一调制方法映射到符号。 根据在第一次传输之后的第二次发送时与第一调制方法不同的第二调制方法，重传方法将码字的至少一些比特映射到符号。 在这种情况下，第二调制方法可以具有比第一调制方法更低的调制次序，或者根据第二调制的符号的每比特的平均可靠性的总和可以大于符号的每比特的平均可靠性的总和 根据第一调制方式。

公开(公告)号：WO2010019015A2

公开(公告)日：2010-02-18

申请号：PCT/KR2009004560

申请日：2009-08-14

Applicant: KOREA ELECTRONICS TELECOMM ,  UNIV KYUNGHEE IACF ,  KIM JI HYUNG ,  SHIN WOORAM ,  KWON DONG SEUNG ,  YEH CHOONGIL ,  HONG EEN KEE

Inventor： KIM JI HYUNG ,  SHIN WOORAM ,  KWON DONG SEUNG ,  YEH CHOONGIL ,  HONG EEN KEE

IPC: H04B7/06 ,  H04B7/08

CPC classification number: H04B7/0617 ,  H04B7/0417 ,  H04B7/0639 ,  Y02D70/00 ,  Y02D70/1262 ,  Y02D70/444

Abstract: A method to generate a beamforming vector by a terminal includes receiving information on a first precoding matrix and a second precoding matrix from a serving base station; and generating a beamforming vector by linearly combining the first precoding matrix and the second precoding matrix.

Abstract translation: 由终端生成波束形成向量的方法包括从服务基站接收关于第一预编码矩阵和第二预编码矩阵的信息; 以及通过线性组合第一预编码矩阵和第二预编码矩阵来生成波束形成向量。

公开(公告)号：WO2009136732A2

公开(公告)日：2009-11-12

申请号：PCT/KR2009002378

申请日：2009-05-06

Applicant: KOREA ELECTRONICS TELECOMM ,  YEH CHOONG IL ,  KWAK BYUNG-JAE ,  KWON DONG SEUNG ,  AHN JEE HWAN

Inventor： YEH CHOONG IL ,  KWAK BYUNG-JAE ,  KWON DONG SEUNG ,  AHN JEE HWAN

IPC: H04W72/04

CPC classification number: H04L5/0007 ,  H04L5/003 ,  H04L5/0053 ,  H04W72/04

Abstract: An access point allocates a resource for ranging to an access terminal included therein, and receives a ranging channel that includes an identifier of the access terminal and a plurality of pilots. The AP checks the access terminal by using the received identifier, and measures a round trip delay of the access terminal based on the received pilots.

Abstract translation: 接入点向其中包括的接入终端分配用于测距的资源，并且接收包括接入终端的标识符和多个导频的测距信道。 AP通过使用接收到的标识符来检查接入终端，并且基于接收的导频测量接入终端的往返延迟。

公开(公告)号：WO2009113792A1

公开(公告)日：2009-09-17

申请号：PCT/KR2009/001179

申请日：2009-03-10

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  KWON, Dong Seung ,  KWAK, Byung-Jae ,  PARK, Bum-Soo ,  YEH, Choong Il ,  SONG, Young Seog ,  LEE, Seung Joon ,  KIM, Ji Hyung

Inventor： KWON, Dong Seung ,  KWAK, Byung-Jae ,  PARK, Bum-Soo ,  YEH, Choong Il ,  SONG, Young Seog ,  LEE, Seung Joon ,  KIM, Ji Hyung

IPC: H04L27/36 ,  H04L27/20 ,  H03M13/29

CPC classification number: H04L27/34 ,  H03M13/256 ,  H03M13/258 ,  H03M13/27 ,  H03M13/2957 ,  H04L1/0045 ,  H04L1/0066 ,  H04L1/0068 ,  H04L1/007 ,  H04L1/0071

Abstract: The present invention provides a method and an apparatus for symbol mapping. The encoder, for example a systematic encoder, of the symbol mapping apparatus encodes transmission data (S410) and outputs data in which a plurality of redundancy bits are added to a plurality of information bits. A puncturer punctures the information bits and the redundancy bits (S420). An information interleaver interleaves the punctured information bits, and a redundancy interleaver interleaves the punctured redundancy bits (S430). Finally, the symbol mapper maps the interleaved information bits and the interleaved redundancy bits onto the symbols (S440). The average log-likelihood ratio (LLR) value of mapped information bits is different from the average LLR value of the mapped redundancy bits.

Abstract translation: 本发明提供了一种用于符号映射的方法和装置。 符号映射装置的编码器（例如系统编码器）对发送数据进行编码（S410），并将多个冗余比特的数据输出到多个信息比特。 穿孔者对信息比特和冗余比特进行穿孔（S420）。 信息交织器对穿孔信息比特进行交织，冗余交织器交织穿孔冗余比特（S430）。 最后，符号映射器将交织的信息比特和交织的冗余比特映射到符号上（S440）。 映射信息位的平均对数似然比（LLR）值与映射冗余位的平均LLR值不同。

公开(公告)号：WO2009075456A1

公开(公告)日：2009-06-18

申请号：PCT/KR2008/004910

申请日：2008-08-22

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  SAMSUNG ELECTRONICS CO., LTD. ,  YEH, Choong il ,  LEE, Seung Joon ,  KWON, Dong Seung

Inventor： YEH, Choong il ,  LEE, Seung Joon ,  KWON, Dong Seung

IPC: H04B7/06

CPC classification number: H04B7/0452 ,  H04B7/0434 ,  H04B7/0439 ,  Y02D70/142 ,  Y02D70/444

Abstract: The present invention relates to a transmission interference cancellation method for a multiuser MIMO system. The method includes decomposing a channel matrix to represent formulae of permutation matrixes including a first matrix and a second matrix; determining an optimal permutation matrix among a plurality of available permutation matrixes using a norm of multiplication of the second matrix and a transmitting data vector; and determining the second matrix using the determined optimal permutation matrix and calculating a transmitting precoding vector using the determined second matrix and the transmitting data vector.

Abstract translation: 本发明涉及一种用于多用户MIMO系统的传输干扰消除方法。 该方法包括分解信道矩阵以表示包括第一矩阵和第二矩阵的置换矩阵的公式; 使用所述第二矩阵和发送数据向量的乘法范数来确定多个可用置换矩阵中的最优置换矩阵; 以及使用所确定的最优置换矩阵确定所述第二矩阵，并使用所确定的第二矩阵和所述发送数据向量来计算发送预编码向量。

公开(公告)号：WO2008054077A1

公开(公告)日：2008-05-08

申请号：PCT/KR2007/005083

申请日：2007-10-17

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  SAMSUNG ELECTRONICS CO., LTD. ,  SONG, Young-Seog ,  KWON, Dong-Seung

Inventor： SONG, Young-Seog ,  KWON, Dong-Seung

IPC: H04B7/04

CPC classification number: H04B7/0452

Abstract: Disclosed is a beam-based transmission method and device. A multi-user MIMO system forms a spatial channel matrix including a precoding matrix by using a unitary matrix, estimates performance based on the spatial channel matrix to extract and store an optimized terminal set combination and an optimized beam, and performs a scheduling process by using the optimized terminal set combination. Therefore, the optimized multi-user MIMO system can be provided by scheduling various terminals and increasing the number of terminals applied to the MIMO system.

Abstract translation: 公开了一种基于波束的传输方法和装置。 多用户MIMO系统通过使用酉矩阵形成包括预编码矩阵的空间信道矩阵，基于空间信道矩阵估计性能来提取和存储优化的终端组合和优化的波束，并且通过使用 优化终端机组合。 因此，可以通过调度各种终端并增加应用于MIMO系统的终端的数量来提供优化的多用户MIMO系统。

公开(公告)号：WO2005050887A3

公开(公告)日：2007-10-11

申请号：PCT/KR2004001958

申请日：2004-08-04

Applicant: KOREA ELECTRONICS TELECOMM ,  SAMSUNG ELECTRONICS CO LTD ,  KT CORP ,  SK TELECOM CO LTD ,  KT FREETEL CO LTD ,  HANARO TELECOM INC ,  LEE YU-RO ,  KWON DONG-SEUNG ,  KIM SEONG-RAG ,  CHOI IN-KYEONG ,  YEH CHOONG-IL ,  LIM HYOUNG-SOO ,  CHO SEONG-CHUL ,  OH JONG-EE ,  HWANG SEUNG-KU ,  AHN JEE-HWAN ,  YOON SOON-YOUNG ,  SUNG SANG-HOON ,  CHO JAE-HEE ,  HWANG IN-SEOK ,  HUH HOON

Inventor： LEE YU-RO ,  KWON DONG-SEUNG ,  KIM SEONG-RAG ,  CHOI IN-KYEONG ,  YEH CHOONG-IL ,  LIM HYOUNG-SOO ,  CHO SEONG-CHUL ,  OH JONG-EE ,  HWANG SEUNG-KU ,  AHN JEE-HWAN ,  YOON SOON-YOUNG ,  SUNG SANG-HOON ,  CHO JAE-HEE ,  HWANG IN-SEOK ,  HUH HOON

IPC: H04J11/00 ,  H04L27/26 ,  H04L20060101

CPC classification number: H04L5/023 ,  H04L25/023

Abstract: Disclosed is a method for configuring an uplink frame in an OFDMA based wireless communication system. The total band of the uplink frame is divided into a predetermined number of subcarrier groups. Subcarriers within the respective allocated subcarrier groups are allocated to the subchannel defined for a predetermined number of consecutive symbols defined by slots in the uplink frame. Pilot subcarriers are allocated by the unit of the predetermined number of symbols so as to allow channel estimation from among the allocated subcarriers. Accordingly, data subcarriers are allocated by minimizing collision with specific users of adjacent cells so as to enable channel estimation using preambles in a cellular system, and some positions of the data subcarriers are allocated for pilots, thereby allowing synchronous demodulation and improving frequency reuse rates.

Abstract translation: 公开了一种在基于OFDMA的无线通信系统中配置上行链路帧的方法。 将上行链路帧的总频带划分为预定数量的子载波组。 将分配的子载波组内的子载波分配给由上行链路帧中的时隙定义的预定数量的连续符号所定义的子信道。 导频子载波由预定数目的符号的单位分配，以便允许从所分配的子载波中进行信道估计。 因此，通过最小化与相邻小区的特定用户的冲突来分配数据子载波，以便能够使用蜂窝系统中的前同步码进行信道估计，并且为导频分配数据子载波的一些位置，从而允许同步解调和提高频率重用率。

公开(公告)号：WO2007066871A2

公开(公告)日：2007-06-14

申请号：PCT/KR2006/002924

申请日：2006-07-25

Applicant: Electronics and Telecommunications Research Institute ,  LIM, Hyung-Soo ,  LEE, Yu-Ro ,  KWON, Dong-Seung

Inventor： LIM, Hyung-Soo ,  LEE, Yu-Ro ,  KWON, Dong-Seung

IPC: H04L27/26 ,  H04L5/02 ,  H04J13/00

CPC classification number: H04L5/0021 ,  H04J13/0048 ,  H04J13/18 ,  H04L5/0007 ,  H04L5/0039 ,  H04L5/0064 ,  H04L5/0073

Abstract: The present invention relates to a method for allocating a frequency domain spread code in a base station of a multi-carrier code division multiple access (MC-CDMA) communication system. A code allocation priority is established based on interference between previously allocated spread codes and a newly allocated spread code so as to minimize the interference caused by channel fading or a synchronization error according to a transmitting or receiving timing offset when a scheduler of the base station in the MC-CDMA communication system allocates a subcarrier group to the plurality of user terminals or channels, and the spread code is allocated to the plurality of user terminals or channels according to the established priority, by the scheduler of the base station.

Abstract translation: 本发明涉及一种在多载波码分多址（MC-CDMA）通信系统的基站中分配频域扩频码的方法。 基于先前分配的扩展码和新分配的扩展码之间的干扰建立码分配优先级，以便当基站的调度器处于发送或接收定时偏移时，根据发送或接收定时偏移最小化由信道衰落或同步误差引起的干扰 MC-CDMA通信系统向多个用户终端或信道分配子载波组，并且由基站的调度器根据建立的优先级将扩频码分配给多个用户终端或信道。

公开(公告)号：WO2007066869A2

公开(公告)日：2007-06-14

申请号：PCT/KR2006/002915

申请日：2006-07-25

Applicant: Electronics and Telecommunications Research Institute ,  SONG, Young-Seog ,  KWON, Dong-Seung ,  OH, Jong-Ee

Inventor： SONG, Young-Seog ,  KWON, Dong-Seung ,  OH, Jong-Ee

IPC: H04J13/02

CPC classification number: H04L27/2627 ,  H04B1/707 ,  H04B2201/70703 ,  H04J13/10 ,  H04L5/0021 ,  H04L25/03343

Abstract: The present invention relates to a transmitting apparatus using a spread-spectrum transmission scheme. The transmitting apparatus includes a precoder for precoding a data signal by performing a product operation between a first matrix and a diagonal matrix. The precoding outputs a signal responding to the input data by performing a product operation between the first matrix and the diagonal matrix. Such a transmitting apparatus obtains a maximum diversity gain.

Abstract translation: 本发明涉及使用扩频传输方案的发送装置。 发送装置包括预编码器，用于通过执行第一矩阵和对角矩阵之间的乘积运算来预编码数据信号。 预编码通过在第一矩阵和对角矩阵之间执行乘积运算来输出响应于输入数据的信号。 这样的发送装置获得最大分集增益。