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1. 发明授权

US07333549B2 Method and apparatus for estimating a signal sequence in a MIMO-OFDM mobile communication system 有权
标题翻译：用于估计MIMO-OFDM移动通信系统中的信号序列的方法和装置
公开(公告)号：US07333549B2
公开(公告)日：2008-02-19
申请号：US10756073
申请日：2004-01-12
申请人： Jong-Ho Lee , Jae-Hak Chung , Chan-Soo Hwang , Seung-Hoon Nam , Do-Young Kwak , Jae-Choong Han , Seong-Cheol Kim
发明人： Jong-Ho Lee , Jae-Hak Chung , Chan-Soo Hwang , Seung-Hoon Nam , Do-Young Kwak , Jae-Choong Han , Seong-Cheol Kim
IPC分类号： H04L27/28
CPC分类号： H04L25/0236 , H04L1/0618 , H04L25/0212 , H04L27/2649
摘要： A apparatus and method for estimating a sequence of transmitted quadrature amplitude modulation (QAM)-modulated signals and space-time block coded signals using an optimal expectation-maximization (EM)-based iterative estimation algorithm in a multiple-input and multiple-output (MIMO)-orthogonal frequency division multiplexing (OFDM) mobile communication system. An initial sequence estimation value is produced on the basis of a predetermined initial value using a pilot sub-carrier contained in each of OFDM signals received by a receiving side. A normalized value of a received signal on a channel-by-channel basis is produced by a predetermined equation using orthogonality between the OFDM signals received by the receiving side. At least one subsequent sequence estimation value is produced using the initial sequence estimation value and the normalized value of the received signal on the channel-by-channel basis. If the subsequent sequence estimation value converges to a constant value after an operation of producing the subsequent sequence estimation value is iterated the predetermined number of times, the converged subsequent sequence estimation value is designated as a final sequence estimation value.
摘要翻译：一种用于在多输入和多输出中使用最佳期望最大化（EM）的迭代估计算法来估计发送的正交幅度调制（QAM）调制信号和时空块编码信号的序列的装置和方法 MIMO） - 正交频分复用（OFDM）移动通信系统。使用包含在由接收侧接收的每个OFDM信号中的导频子载波，基于预定初始值产生初始序列估计值。通过使用由接收侧接收的OFDM信号之间的正交性的预定方程式，在逐个信道的基础上产生接收信号的归一化值。使用初始序列估计值和逐个信道的接收信号的归一化值来产生至少一个后续序列估计值。如果后续序列估计值在产生后续序列估计值的操作被迭代预定次数之后收敛到常数值，则将收敛后续序列估计值指定为最终序列估计值。

2. 发明授权

US07505527B2 Transmitting and receiving apparatus for supporting transmit antenna diversity using space-time block code 有权
标题翻译：使用时空块码支持发射天线分集的发射和接收装置
公开(公告)号：US07505527B2
公开(公告)日：2009-03-17
申请号：US10681937
申请日：2003-10-09
申请人： Chan-Soo Hwang , Vahid Tarokh , Seung-Hoon Nam , Jae-Hak Chung , Yung-Soo Kim
发明人： Chan-Soo Hwang , Vahid Tarokh , Seung-Hoon Nam , Jae-Hak Chung , Yung-Soo Kim
IPC分类号： H04B7/02
CPC分类号： H04L1/0618 , H04B7/0669 , H04B7/0697 , H04B7/0891 , H04L1/0643
摘要： A transmitter and a receiver are disclosed herein that support transmit antenna diversity using space-time block coding in a wireless communication system. The transmitter produces symbol combinations containing, as their elements, input symbols, the inversions and conjugates of the symbols, and symbols obtained by rotating the phases of the symbols once, forms a matrix having symbols in at least two columns orthogonal to each other with the symbol combinations, and transmits the matrix. The receiver detects symbols that minimize maximum likelihood (ML) decoding metrics over all possible symbols using channel gains from transmit antennas to a receive antenna. Also, the receiver selects candidate symbols among all possible symbols according to the characteristics of transmitted modulation symbols and detects symbols that minimize the ML decoding metrics.
摘要翻译：本文公开的发射器和接收器在无线通信系统中支持使用空时块编码的发射天线分集。发射机产生符号组合，其包含输入符号，符号的反转和共轭以及通过旋转符号的相位获得的符号一次作为其元素，形成具有彼此正交的至少两列中的符号的矩阵，符号组合，并传输矩阵。接收机通过使用从发射天线到接收天线的信道增益，检测所有可能符号上的最大似然（ML）解码度量的符号。此外，接收机根据发送的调制符号的特性来选择所有可能符号中的候选符号，并且检测使ML解码度量最小化的符号。

3. 发明申请

US20060146856A1 Adaptive subchannel and bit allocation method using partial channel information feedback in an orthogonal frequency division multiple access communication system 有权
标题翻译：在正交频分多址通信系统中使用部分信道信息反馈的自适应子信道和比特分配方法
公开(公告)号：US20060146856A1
公开(公告)日：2006-07-06
申请号：US11321546
申请日：2005-12-29
申请人： Young-Ho Jung , Jae-Hak Chung , Chan-Soo Hwang , Seung-Hoon Nam
发明人： Young-Ho Jung , Jae-Hak Chung , Chan-Soo Hwang , Seung-Hoon Nam
IPC分类号： H04L12/28
CPC分类号： H04L5/0094 , H04L1/0017 , H04L1/0029 , H04L1/0035 , H04L5/0007 , H04L5/0046 , H04L5/006 , H04W24/00 , H04W24/10 , H04W28/06 , H04W72/042 , H04W72/0453
摘要： An adaptive subchannel and bit allocation method in a wireless communication system. A mobile station analyzes channel quality information of a subchannel at a predetermined period and determines a feedback band index with a maximum decision criterion. The mobile station feeds back the determined feedback band index with the maximum decision criterion to a base station. The base station generates band allocation information using the feedback information from the mobile station, and transmits the band allocation information to the mobile station. The mobile station transmits AMC information using the band allocation information received from the base station. The base station estimates a channel using the AMC information transmitted from the mobile station and allocates bits to the allocated band according to the channel estimation result.
摘要翻译：一种无线通信系统中的自适应子信道和比特分配方法。移动台以预定周期分析子信道的信道质量信息，并以最大决策准则确定反馈频带索引。移动台将确定的具有最大决策准则的反馈频带索引反馈给基站。基站使用来自移动台的反馈信息生成频带分配信息，并将该频带分配信息发送到移动台。移动台使用从基站接收到的频带分配信息来发送AMC信息。基站使用从移动站发送的AMC信息来估计信道，并根据信道估计结果向所分配的频带分配比特。

4. 发明申请

US20060056538A1 Apparatus and method for transmitting data using full-diversity, full-rate STBC 审中-公开
标题翻译：使用全分集，全速率STBC传输数据的装置和方法
公开(公告)号：US20060056538A1
公开(公告)日：2006-03-16
申请号：US11205931
申请日：2005-08-17
申请人： Seung-Hoon Nam , Chan-Soo Hwang , Jae-Hak Chung , Young-Ho Jung , Won-Il Roh , Chan-Byoung Chae
发明人： Seung-Hoon Nam , Chan-Soo Hwang , Jae-Hak Chung , Young-Ho Jung , Won-Il Roh , Chan-Byoung Chae
IPC分类号： H04L27/36 , H04B7/06
CPC分类号： H04L27/34 , H04B7/0613 , H04B7/0669 , H04L1/0643
摘要： A data transmission apparatus and method using a full-diversity, full-rate STBC are provided. In the data transmission apparatus, a serial-to-parallel converter converts an input bit stream to parallel binary vectors. A bit/symbol mapper generates modulator input symbols by combining the bits of the binary vectors. A modulator modulates the modulator input symbols to complex symbols. A transmit matrix block encoder encodes the complex symbols using a transmit matrix and transmits the coded symbols through corresponding transmit antennas.
摘要翻译：提供了一种使用全分集全速率STBC的数据传输装置和方法。在数据传输装置中，串行到并行转换器将输入比特流转换为并行二进制向量。位/符号映射器通过组合二进制向量的位来产生调制器输入符号。调制器将调制器输入符号调制为复数符号。传输矩阵块编码器使用发送矩阵对复符号进行编码，并通过对应的发射天线发送编码符号。

5. 发明申请

US20060056528A1 Method of transmitting and receiving preamble sequences in an orthogonal frequency division multiplexing communication system using multiple input multiple output scheme 审中-公开
标题翻译：在使用多输入多输出方案的正交频分复用通信系统中发送和接收前导序列的方法
公开(公告)号：US20060056528A1
公开(公告)日：2006-03-16
申请号：US11202573
申请日：2005-08-12
申请人： Young-Ho Jung , Jae-Hak Chung , Chan-Soo Hwang , Seung-Hoon Nam
发明人： Young-Ho Jung , Jae-Hak Chung , Chan-Soo Hwang , Seung-Hoon Nam
IPC分类号： H04K1/10
CPC分类号： H04B7/0667 , H04B7/04 , H04L27/2613 , H04L27/2656 , H04L27/2657 , H04L27/2662
摘要： A method of transmitting and receiving preamble sequences in a transmitter in an OFDM communication system is provided. A transmitter segments a first sequence of a predetermined length into a predetermined number of second sequences, generates as many preamble sequences as the second sequences by applying different time offsets to the second sequences, selects a predetermined number of preamble sequences among the generated preamble sequences, maps the selected preamble sequences to the transmit antennas, and transmits the mapped preamble sequences through the transmit antennas.
摘要翻译：提供了一种在OFDM通信系统中在发射机中发送和接收前导码序列的方法。发射机将预定长度的第一序列分段成预定数量的第二序列，通过对第二序列应用不同的时间偏移量来产生与第二序列一样多的前导码序列，在所生成的前同步码序列之间选择预定数量的前同步码序列，将所选择的前导码序列映射到发射天线，并且通过发射天线发射所映射的前同步码序列。

6. 发明申请

US20050243939A1 Pilot designing method in an uplink OFDMA system 有权
标题翻译：上行OFDMA系统中的导频设计方法
公开(公告)号：US20050243939A1
公开(公告)日：2005-11-03
申请号：US11078157
申请日：2005-03-11
申请人： Young-Ho Jung , Jae-Hak Chung , Chan-Soo Hwang , Seung-Hoon Nam , Yong-Hoon Lee , Hong-Sun Park
发明人： Young-Ho Jung , Jae-Hak Chung , Chan-Soo Hwang , Seung-Hoon Nam , Yong-Hoon Lee , Hong-Sun Park
IPC分类号： H04J11/00 , H04L27/26 , H04K1/10
CPC分类号： H04L5/0048 , H04L5/0023 , H04L25/0204 , H04L25/0226 , H04L25/0232
摘要： A pilot designing method in an uplink OFDMA system is provided. In the uplink OFDMA system, communications are carried out in a frame divided into time-frequency lattices, and each time-frequency lattice includes a plurality of data symbol periods and a plurality of pilot symbol periods intermittently arranged with respect to the data symbol periods. The frame is divided into a plurality of blocks. The blocks are allocated to the terminals. A predetermined allocated pilot time-frequency lattice is shared between adjacent terminals.
摘要翻译：提供了一种上行链路OFDMA系统中的导频设计方法。在上行链路OFDMA系统中，以划分为时频格点的帧进行通信，并且每个时间频率格子包括相对于数据符号周期间歇地布置的多个数据符号周期和多个导频符号周期。该帧被分成多个块。这些块分配给终端。在相邻的终端之间共享预定的分配的导频时间频率点阵。

7. 发明授权

US07889814B2 Transmitting and receiving apparatus for supporting transmit antenna diversity using space-time block code 有权
标题翻译：使用时空块码支持发射天线分集的发射和接收装置
公开(公告)号：US07889814B2
公开(公告)日：2011-02-15
申请号：US11804126
申请日：2007-05-17
申请人： Chan-Soo Hwang , Vahid Tarokh , Seung-Hoon Nam , Jae-Hak Chung , Yung-Soo Kim
发明人： Chan-Soo Hwang , Vahid Tarokh , Seung-Hoon Nam , Jae-Hak Chung , Yung-Soo Kim
IPC分类号： H04L27/06
CPC分类号： H04L1/0618 , H04B7/0669 , H04B7/0697 , H04B7/0891 , H04L1/0643
摘要： A transmitter and a receiver are disclosed herein that support transmit antenna diversity using space-time block coding in a wireless communication system. The transmitter produces symbol combinations containing, as their elements, input symbols, the inversions and conjugates of the symbols, and symbols obtained by rotating the phases of the symbols once, forms a matrix having symbols in at least two columns orthogonal to each other with the symbol combinations, and transmits the matrix. The receiver detects symbols that minimize maximum likelihood (ML) decoding metrics over all possible symbols using channel gains from transmit antennas to a receive antenna. Also, the receiver selects candidate symbols among all possible symbols according to the characteristics of transmitted modulation symbols and detects symbols that minimize the ML decoding metrics.
摘要翻译：本文公开的发射器和接收器在无线通信系统中支持使用空时块编码的发射天线分集。发射机产生符号组合，其包含输入符号，符号的反转和共轭以及通过旋转符号的相位获得的符号一次作为其元素，形成具有彼此正交的至少两列中的符号的矩阵，符号组合，并传输矩阵。接收机通过使用从发射天线到接收天线的信道增益，检测所有可能符号上的最大似然（ML）解码度量的符号。此外，接收机根据发送的调制符号的特性来选择所有可能符号中的候选符号，并且检测使ML解码度量最小化的符号。

8. 发明授权

US07480339B2 Apparatus and method for transmitting/receiving a pilot sequence in a mobile communication system using space-time trellis code 有权
标题翻译：在使用时空网格码的移动通信系统中发送/接收导频序列的装置和方法
公开(公告)号：US07480339B2
公开(公告)日：2009-01-20
申请号：US10695579
申请日：2003-10-28
申请人： Chan-Soo Hwang , Yung-Soo Kim , Seung-Hoon Nam , Jae-Hak Chung
发明人： Chan-Soo Hwang , Yung-Soo Kim , Seung-Hoon Nam , Jae-Hak Chung
IPC分类号： H04B7/02 , H03D1/00
CPC分类号： H04L1/0069 , H04L1/0618 , H04L25/0202
摘要： A mobile communication system includes M transmission antennas, P encoders for receiving P information bit streams and encoding the received information bit streams with a space-time trellis code (STTC), and M modulators for modulating information bit streams output from the P encoders in a predetermined modulation scheme and outputting modulation symbol streams. A sequence used for channel estimation is generated, and the sequence is transmitted in substitute for at least one modulation symbol in a predetermined position through the M transmission antennas, for each of the modulation symbol streams output from the M modulators.
摘要翻译：一种移动通信系统包括：M个发送天线，用于接收P个信息比特流的P编码器，并用空时格码（STTC）对接收到的信息比特流进行编码; M个调制器，用于调制从P编码器输出的信息比特流预定调制方案并输出调制符号流。产生用于信道估计的序列，并且对于从M个调制器输出的每个调制符号流，通过M个发送天线，发送该序列以代替预定位置中的至少一个调制符号。

9. 发明授权

US07457372B2 Data transmission/reception apparatus and method for achieving both multiplexing gain and diversity gain in a mobile communication system using space-time trellis code 有权
标题翻译：数据发送/接收装置和方法，用于在使用时空网格码的移动通信系统中实现复用增益和分集增益
公开(公告)号：US07457372B2
公开(公告)日：2008-11-25
申请号：US10695493
申请日：2003-10-28
申请人： Chan-Soo Hwang , Yung-Soo Kim , Seung-Hoon Nam , Jae-Hak Chung
发明人： Chan-Soo Hwang , Yung-Soo Kim , Seung-Hoon Nam , Jae-Hak Chung
IPC分类号： H04L27/04 , H04B1/69
CPC分类号： H04L1/065 , H04L1/0069 , H04L1/0625 , H04L1/0631
摘要： A mobile communication system includes at least three transmission antennas of first to third transmission antennas, and uses an overlapped antenna scheme for grouping the first and second transmission antennas into a first transmission antenna group and grouping the second and third transmission antennas into a second transmission antenna group. First and second modulators modulate L information bit streams to be transmitted through the first transmission antenna group and output first and second modulation symbol streams. Third and fourth modulators modulate L other information bit streams to be transmitted through the second transmission antenna group and output third and fourth symbol streams. First to fourth puncturers puncture at least one modulation symbol in a predetermined position among the first to fourth modulation symbol streams. A multiplexer transmits a modulation symbol stream output from the first puncturer through the first transmission antenna, transmits modulation symbol streams output from the second and third puncturers through the second transmission antenna after summation, and transmits a modulation symbol stream output from the third puncturer through the third transmission antenna.
摘要翻译：移动通信系统包括第一至第三发射天线的至少三个发射天线，并且使用重叠的天线方案将第一和第二发射天线分组成第一发射天线组，并将第二和第三发射天线分组成第二发射天线组。第一和第二调制器调制通过第一发送天线组发送的L个信息比特流并输出第一和第二调制符号流。第三和第四调制器调制通过第二发送天线组发送的另外的信息比特流并输出第三和第四符号流。第一至第四穿孔器在第一至第四调制符号流中的预定位置中至少刺穿一个调制符号。复用器通过第一发送天线发送从第一穿孔器输出的调制符号流，在求和之后通过第二发送天线发送从第二和第三穿孔器输出的调制符号流，并且从第三穿孔器输出的调制符号流通过第三发射天线。

10. 发明申请

US20060215784A1 Transmission apparatus and method for MIMO system 有权
标题翻译： MIMO系统的传输装置和方法
公开(公告)号：US20060215784A1
公开(公告)日：2006-09-28
申请号：US11345717
申请日：2006-02-02
申请人： Seung-Hoon Nam , Chan-Soo Hwang , Jae-Hak Chung , Young-Ho Jung , Won-II Roh , Chan-Byoung Chae
发明人： Seung-Hoon Nam , Chan-Soo Hwang , Jae-Hak Chung , Young-Ho Jung , Won-II Roh , Chan-Byoung Chae
IPC分类号： H04B7/06
CPC分类号： H04B7/0689 , H04B7/0691 , H04B7/0871 , H04B7/0874 , H04L1/0071 , H04L1/06
摘要： A transmitter in a multiple input multiple output (MIMO) communication system is provided. The transmitter includes a multiplexer for multiplexing an input bit stream into a plurality of bit streams, and outputting the bit streams in parallel; a bit-order rearranger for reordering bits constituting the bit streams, which are output from the multiplexer in the same time period, and outputting the reordered bits as reordered bit streams; and a modulator for modulating the parallel reordered bit streams output from the bit-order rearranger according to their associated modulation schemes, and transmitting the modulated symbols via their associated antennas.
摘要翻译：提供了一种多输入多输出（MIMO）通信系统中的发射机。发射机包括多路复用器，用于将输入比特流复用成多个比特流，并且并行地输出比特流; 用于重新排序构成比特流的比特序列重排器，其在同一时间段内从多路复用器输出，并将重新排序的比特输出为重新排序的比特流; 以及调制器，用于根据它们相关联的调制方案来调制从位顺序重排器输出的并行重排序比特流，以及经由其相关天线发送调制符号。

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