公开(公告)号：KR1020060008189A

公开(公告)日：2006-01-26

申请号：KR1020040060008

申请日：2004-07-22

Applicant: 삼성전자주식회사 ,  한국과학기술원

Inventor： 정영호 ,  황찬수 ,  이용훈 ,  김경민 ,  윤재연 ,  신원용 ,  정진곤 ,  장우혁 ,  남우석

IPC: H04L27/26

CPC classification number: H04L5/026 ,  H04B1/7143 ,  H04B1/715 ,  H04B2001/7154 ,  H04L1/0003 ,  H04L1/0009 ,  H04L5/0012

Abstract: 본 발명은 전체 주파수 대역을 다수의 서브 캐리어 대역들로 분할하고, 미리 설정된 설정 개수의 서브 캐리어 대역들의 집합인 다수의 서브 채널들을 구비하며, 다수의 셀들을 구비하는 주파수 도약-직교 주파수 분할 다중 접속(FH-OFDMA: Frequency Hopping-Orthogonal Frequency Division Multiple Access) 통신 시스템에서, 상기 다수의 셀들 각각에 대해, 미리 설정한 조건에 상응하게 상기 다수의 서브 채널들중 미리 설정한 개수의 서브 채널들을 적응적 변조 및 코딩(AMC: Adaptive Modulation and Coding) 방식을 적용하기 위한 AMC 서브 채널들로 할당하고, 상기 다수의 서브 채널들중 상기 AMC 서브 채널들을 제외한 서브 채널들을 FH-OFDMA 방식을 적용하기 위한 FH-OFDMA 서브 채널들로 할당한다.

다중 셀 로딩율, 인접 셀 간섭 신호, AMC 방식, 주파수 도약 방식, 주파수 재사용율

公开(公告)号：KR1020050045470A

公开(公告)日：2005-05-17

申请号：KR1020030079549

申请日：2003-11-11

Applicant: 삼성전자주식회사 ,  한국과학기술원

Inventor： 김동호 ,  정재학 ,  김호진 ,  황찬수 ,  김상우 ,  남승훈 ,  김응선

IPC: H03M13/23

CPC classification number: H03M13/2975 ,  H04L1/0051

Abstract: 후술 될 본 발명에서는 터보코드의 복호화 과정에서 복호 지연시간과 복호 연산량을 줄이기 위한 반복 복호 조기정지 기법에 대해 제안할 것이다. 여기서 제안하는 조기정지 기법은 터보코드의 반복 복호에서 비트 단위로 조기정지 여부를 결정하고, 정지되지 않은 비트에 한하여 추가적으로 반복적인 복호를 수행함으로써 복호 연산량과 지연시간을 줄이는 방법이다.

公开(公告)号：KR1020050043297A

公开(公告)日：2005-05-11

申请号：KR1020030078133

申请日：2003-11-05

Applicant: 삼성전자주식회사

Inventor： 황찬수 ,  송기봉 ,  이동준

IPC: H04L27/26

CPC classification number: H04L1/0071 ,  H04L1/06

Abstract: 본 발명은 임의의 수신안테나로부터 수신된 수신심벌에 대한 에러 추정을 이용하여 다른 수신안테나로부터 수신된 수신심벌에 대한 에러 추정을 수행하는 복수개의 안테나를 사용하는 이동통신 시스템에 있어서, 상기 복수 개의 송신안테나들로 송신하는 송신심벌을 일정 비트 수만큼 중첩되지 않게 쉬프터를 수행한 후 전송한다. 이와 같이 함으로서, 다른 수신안테나로부터 수신된 수신심볼에 대한 에러 추정을 함에 있어 상기 임의의 수신안테나로부터 수신된 수신심벌의 에러에 대한 영향을 감소시킨다.

公开(公告)号：KR1020050027564A

公开(公告)日：2005-03-21

申请号：KR1020030063851

申请日：2003-09-15

Applicant: 삼성전자주식회사

Inventor： 서창호 ,  황찬수 ,  박동식

IPC: H04J11/00

CPC classification number: H04L5/0046 ,  H04L1/0026 ,  H04L5/0007 ,  H04L5/0037 ,  H04L27/2601

Abstract: An apparatus and a method for transmitting/receiving multicast data in a multicast orthogonal frequency division multiple communication system are provided to enhance frequency efficiency when transmitting scalable multicast data by adaptively modulating real time link parameters obtained by sub-optimal solutions. A multicast data transmission apparatus divides an overall frequency band into plural sub-carrier bands and transmits hierarchical multicast data. A sub-carrier allocator(402) uses channel quality information fed back from respective mobile terminals to allocate the sub-carriers for the respective mobile stations. A bit allocator(403) uses the channel quality information and the allocation information of the sub-carriers to allocate the number of bits to be transmitted via each of the sub-carriers. A transmitter modulates the multicast data such that the multicast data corresponds to the allocated bit numbers, and transmits the modulated result to the mobile stations.

Abstract translation: 提供了一种用于在多播正交频分多址通信系统中发送/接收组播数据的装置和方法，用于通过对通过次优解决方案获得的实时链路参数进行自适应调制来发送可扩展组播数据，提高频率效率。 组播数据发送装置将总频带划分为多个子载波频带，并发送分层多播数据。 子载波分配器（402）使用从各个移动终端反馈的信道质量信息来分配各个移动台的子载波。 位分配器（403）使用信道质量信息和子载波的分配信息来分配经由每个子载波发送的比特数。 发射机调制组播数据，使得组播数据对应于分配的比特数，并将调制结果发送到移动台。

公开(公告)号：KR1020050008388A

公开(公告)日：2005-01-21

申请号：KR1020030048461

申请日：2003-07-15

Applicant: 삼성전자주식회사

Inventor： 서창호 ,  황찬수 ,  카츠마르코스다니엘 ,  채찬병 ,  최호규

IPC: H04J11/00

CPC classification number: H04J13/0014 ,  H04B7/068 ,  H04J11/003 ,  H04J13/16 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0226 ,  H04L27/262 ,  H04L27/2657

Abstract: PURPOSE: An apparatus and a method for generating the preamble sequences in an orthogonal frequency division multiplexing(OFDM) communication system using a plurality of transmission antennas are provided to allow the preamble sequence generation having the minimum PAPR in the OFDM system, thereby improving the overall performance of the OFDM communication system. CONSTITUTION: An apparatus for generating the preamble sequences in an orthogonal frequency division multiplexing communication system using a first predetermined number of sub-carriers and a second predetermined number of transmission antennas includes the second predetermined number of sequence generators(610,620,630) and the second predetermined number of sequence preamble sequence mapping devices(613,623,633). The sequence generators generate the sequence having the third length obtained by dividing the first predetermined number by the second predetermined number. The sequence preamble sequence mapping devices insert the null data corresponding to the sub-carrier waves representing the interference removal components between the DC component and the sub-carrier waves among the N number of sub-carrier waves. And, the sequence preamble sequence mapping devices perform the mapping corresponding each of the sequence components to each of the sub-carriers inserting the null data and generate the mapped data as the preamble sequences of the transmission antennas.

Abstract translation: 目的：提供一种在使用多个发送天线的正交频分复用（OFDM）通信系统中生成前同步码序列的装置和方法，以允许在OFDM系统中具有最小PAPR的前导序列生成，从而改善整体 OFDM通信系统的性能。 构成：在使用第一预定数量的子载波和第二预定数量的发送天线的正交频分复用通信系统中生成前导码序列的装置包括第二预定数量的序列发生器（610,620,630）和第二预定数 的序列前导序列映射设备（613,623,633）。 序列生成器生成具有通过将第一预定数除以第二预定数而获得的第三长度的序列。 序列前导码序列映射装置在N个子载波之间插入与代表DC分量和子载波之间的干扰去除分量的子载波对应的空数据。 并且，序列前导码序列映射设备执行对应于每个子载波的每个序列分量的映射，插入空数据，并产生映射的数据作为发送天线的前导码序列。

公开(公告)号：KR1020040074325A

公开(公告)日：2004-08-25

申请号：KR1020030009878

申请日：2003-02-17

Applicant: 삼성전자주식회사

Inventor： 타로크바히드 ,  정재학 ,  김영수 ,  황찬수

IPC: H04J11/00

CPC classification number: H04L27/2623 ,  H04L1/0618 ,  H04L27/2615

Abstract: PURPOSE: A method for reducing a PAPR(Peak to Average Power Ratio) in a MIMO(Multiple Input Multiple Output) antenna OFDM(Orthogonal Frequency Division Multiplexing) communication system is provided, which integrates a space-time coding technique and the PAPR reducing technique. CONSTITUTION: A PAPR reducing part(250) encodes inputted serial signal sequence to reduce PAPR using a Golay code. A space-time coding part(260) encodes the serial signal sequence into N signal sequences to transmit them to N antennas. A serial-to-parallel transformer(200) transforms the serial input sequence into parallel sequence. An IFFT transformation part(210) transforms an input QAM symbol into an OFDM signal. A parallel-to-serial transformer(220) transforms the parallel OFDM signal into a serial OFDM signal. A cyclic prefix adder(230) extends the OFDM symbol cyclically, by inserting a cyclic prefix to a guard interval of the OFDM signal.

Abstract translation: 目的：提供一种降低MIMO（多输入多输出）天线OFDM（正交频分复用）通信系统中的PAPR（峰均功率比）的方法，其中集成了时空编码技术和PAPR降低技术 。 构成：PAPR减少部分（250）编码输入的串行信号序列，以使用格雷码减少PAPR。 空时编码部分（260）将串行信号序列编码为N个信号序列以将它们发送到N个天线。 串行到并行变压器（200）将串行输入序列转换成并行序列。 IFFT变换部（210）将输入QAM符号变换为OFDM信号。 并行变换器（220）将并行OFDM信号变换为串行OFDM信号。 循环前缀加法器（230）通过将循环前缀插入OFDM信号的保护间隔来循环地扩展O​​FDM码元。

公开(公告)号：KR1020040062335A

公开(公告)日：2004-07-07

申请号：KR1020030000144

申请日：2003-01-02

Applicant: 삼성전자주식회사

Inventor： 황찬수 ,  남승훈 ,  김영수 ,  정재학

IPC: H04B7/06

CPC classification number: H04L1/0054 ,  H04L1/0618

Abstract: PURPOSE: A transceiving device for a wireless communication system having 3 transmission antennas is provided to rotate more than two selected symbols as many as predetermined phase values, respectively, before transmitting the symbols to transmission antennas, thereby obtaining a maximum diversity order and reducing transmission delay time. CONSTITUTION: An S/P(Serial to Parallel) converter(210) binds inputted four symbols in one block, and supplies the symbols to a coder(230). The coder(230) configures four combinations that include 3 symbols, respectively, with symbols of one block that includes phase-rotated two symbols, and transmits the four combinations to three transmission antennas(240,242,244) during four time sections. In order to obtain a maximum diversity order, the coder(230) configures the combinations such that inputted four complex symbols can be transmitted in each antenna(240,242,244) and each time section for only one time.

Abstract translation: 目的：提供一种具有3个发送天线的无线通信系统的收发设备，用于在将符号发送到发送天线之前分别旋转多于两个所选符号的预定相位值，从而获得最大分集阶数并减少传输延迟 时间。 构成：S / P（串行到并行）转换器（210）在一个块中结合输入的四个符号，并将符号提供给编码器（230）。 编码器（230）分别将包括3个符号的四个组合与包括相位旋转的两个符号的一个块的符号配置，并且在四个时间段期间将四个组合发送到三个发送天线（240,242,244）。 为了获得最大分集顺序，编码器（230）配置这样的组合，使得可以在每个天线（240,242,244）和每个时间段中仅传输一次时输入的四个复数符号。

公开(公告)号：KR1020040032730A

公开(公告)日：2004-04-17

申请号：KR1020030021364

申请日：2003-04-04

Applicant: 삼성전자주식회사

Inventor： 황찬수 ,  타로크바히드 ,  남승훈 ,  정재학 ,  김영수

IPC: H04B7/02

CPC classification number: H04L1/0618 ,  H04B7/0669 ,  H04B7/0697 ,  H04B7/0891 ,  H04L1/0643

Abstract: PURPOSE: A transmitting and receiving apparatus for supporting transmission antenna diversity by a space-time block code is provided to obtain the maximum transmission rate and the maximum diversity gain in a communication system using 3 or more transmission antennas. CONSTITUTION: A plurality of transmission antennas(140a-140d) are composed for transmission diversity. A transmission encoding matrix generator has an encoder(120) and phase rotating units(130a,130b). The transmission encoding matrix generator composes a plurality of symbols as a plurality of combinations, and transmits the combinations to the transmission antennas(140a-140d) during a plurality of time intervals for transmitting a plurality of the symbols in each antenna and each time interval. The transmission encoding matrix generator applies inversion and conjugate to a plurality of the symbols, rotates phases of the symbols by a certain phase value, and composes a transmission encoding matrix so that at least two columns of the transmission encoding matrix are mutually orthogonal and a diversity gain is maximized.

Abstract translation: 目的：提供一种用于通过空时块码支持发送天线分集的发送和接收装置，以在使用3个或更多个发送天线的通信系统中获得最大传输速率和最大分集增益。 构成：多个发送天线（140a〜140d）构成发送分集。 传输编码矩阵发生器具有编码器（120）和相位旋转单元（130a，130b）。 发送编码矩阵生成器将多个符号作为多个组合组合，并且在用于在每个天线中发送多个符号的多个时间间隔和每个时间间隔中将该组合发送到发送天线（140a-140d）。 发送编码矩阵生成器对多个符号应用反转和共轭，将符号的相位旋转某一相位值，并且构成发送编码矩阵，使得至少两列的发送编码矩阵相互正交，并且分集 增益最大化。

公开(公告)号：KR1020020038861A

公开(公告)日：2002-05-24

申请号：KR1020000068727

申请日：2000-11-18

Applicant: 삼성전자주식회사

Inventor： 황찬수

IPC: H04L27/26

Abstract: PURPOSE: A method and an apparatus for reducing a PAR(Peak to Average Ratio) for a multi carrier transmission system are provided, which trades off the PAR reduction and the complexity reduction for the PAR reduction. CONSTITUTION: According to the method for a multi carrier transmission system having an IFFT(Inverse Fast Fourier Transform) part and a DAC(Digital Analog Converter) part, a constellation of a digital input signal of a 2 square M QAM(Quadrature Amplitude Modulation) which is generated from the IFFT and has an information to transmit is extended into a constellation of 2 square (M+u) QAM signal(50). Then the constellation of the above digital input signal is mapped to the extended constellation(52). And points reducing the peak value of the absolute value of the digital input signal among equivalent points of the mapped constellation are selected(54) and then are transmitted to the digital/analog converter part.

Abstract translation: 目的：提供一种用于降低多载波传输系统的PAR（峰均比）的方法和装置，其减少了PAR减少和PAR减少的复杂度降低。 构成：根据具有IFFT（逆快速傅立叶变换）部分和DAC（数字模拟转换器）部分的多载波传输系统的方法，具有2平方M QAM（正交幅度调制）的数字输入信号的星座， 将从IFFT产生的并且具有要发送的信息扩展为2平方（M + u）QAM信号（50）的星座。 然后将上述数字输入信号的星座映射到扩展星座（52）。 并且选择减少映射星座的等效点之间的数字输入信号的绝对值的峰值的点（54），然后被发送到数/模转换器部分。

公开(公告)号：KR1020000032875A

公开(公告)日：2000-06-15

申请号：KR1019980049492

申请日：1998-11-18

Applicant: 삼성전자주식회사

Inventor： 황인석 ,  황찬수 ,  이용훈 ,  고정완

IPC: G11B20/10

CPC classification number: G11B20/10009 ,  G11B20/1426

Abstract: PURPOSE: A data detecting apparatus is to sample a reproduction signal by speed corresponding to half of data reproduction speed, and detect data of the reproduction speed by using a sample interpolation. CONSTITUTION: A data detecting apparatus comprises a sampler which samples RLL(Ran Length Limited) coded data by half speed of reproduction speed and provides a plurality of sampled data, and an estimator for estimating sample values of the plurality of sampled data by using a sample interpolation. The sampler is an A/D converter(204) for sampling the RLL coded data by double speed of sample period. The estimator consists of a digital interpolation filter(206). The digital interpolation filter comprise an inserter(208) for insert "0" in the plurality of sampled data, and a filter which has 1/4 bandwidth of sample period and filters an output of the inserter at baseband.

Abstract translation: 目的：数据检测装置以对应于数据再现速度的一半的速度对再现信号进行采样，并通过采样插值来检测再现速度的数据。 构成：数据检测装置包括：采样器，其以再现速度的一半速度对RLL（Ran Length Limited）编码数据进行采样，并提供多个采样数据;以及估计器，用于通过使用样本估计多个采样数据的采样值 插值。 采样器是用于通过采样周期的双倍速度对RLL编码数据进行采样的A / D转换器（204）。 估计器由数字插值滤波器（206）组成。 数字内插滤波器包括用于在多个采样数据中插入“0”的插入器（208）和具有采样周期的1/4带宽并且在基带处对插入器的输出进行滤波的滤波器。