公开(公告)号：US20050094741A1

公开(公告)日：2005-05-05

申请号：US10922911

申请日：2004-08-23

Applicant: Shinichi Kuroda

Inventor： Shinichi Kuroda

IPC: H04J99/00 ,  H04B7/06 ,  H04B7/08 ,  H04L1/02 ,  H04L1/06

CPC classification number: H04L25/0224 ,  H04B7/0413 ,  H04B7/0421 ,  H04B7/0456 ,  H04B7/06 ,  H04B7/0619 ,  H04B7/0665 ,  H04B7/0854 ,  H04B7/0862 ,  H04L1/0656 ,  H04L25/0202 ,  H04L27/12 ,  H04L27/2601 ,  H04L2025/0377 ,  H04W72/0406

Abstract: In performing SVD-MIMO transmission, a set-up procedure is simplified while assuring a satisfactory decoding capability with a reduced number of antennas. A transmitter estimates channel information based on reference signals sent from a receiver, determines a transmit antenna weighting coefficient matrix based on the channel information, calculates a weight to be assigned to each of components of a multiplexed signal, and sends, to the receiver, training signals for respective signal components, the training signals being weighted by the calculated weights. On the other hand, the receiver determines a receive antenna weighting coefficient matrix based on the received training signals.

Abstract translation: 在执行SVD-MIMO传输时，简化了建立过程，同时确保了具有减少数量的天线的令人满意的解码能力。 发射机基于从接收机发送的参考信号估计信道信息，基于信道信息确定发射天线加权系数矩阵，计算要分配给复用信号的每个分量的权重，并向接收机发送训练 对于各个信号分量的信号，训练信号由所计算的权重加权。 另一方面，接收机基于接收到的训练信号来确定接收天线加权系数矩阵。

公开(公告)号：US20050078765A1

公开(公告)日：2005-04-14

申请号：US10964275

申请日：2004-10-13

Applicant: Hong-Sil Jeong ,  Jae-Yoel Kim ,  Chan-Byoung Chae

Inventor： Hong-Sil Jeong ,  Jae-Yoel Kim ,  Chan-Byoung Chae

IPC: H04B7/02 ,  H04J99/00 ,  H04L1/00 ,  H04L1/06

CPC classification number: H04L1/0057 ,  H04L1/0071 ,  H04L1/0656

Abstract: A mobile communication system and method for transmitting signals through a plurality of transmission antennas by space-time coding the signals. The signals are transmitted using a low density parity check code. A lifting low density parity check matrix is formed by expanding values of elements in a low density parity check matrix with a sub-matrix corresponding to a number of the transmission antennas. The signals to be transmitted are coded using the lifting low density parity check matrix. Thereafter, the coded signals are serial/parallel converted and transmitted through the transmission antennas.

Abstract translation: 一种用于通过对信号进行空时编码来通过多个发送天线发送信号的移动通信系统和方法。 使用低密度奇偶校验码传输信号。 通过使用与多个发送天线对应的子矩阵在低密度奇偶校验矩阵中扩展元素的值来形成提升低密度奇偶校验矩阵。 要发送的信号使用提升低密度奇偶校验矩阵进行编码。 此后，编码信号被串行/并行转换并通过发送天线发送。

公开(公告)号：US20040203395A1

公开(公告)日：2004-10-14

申请号：US10176453

申请日：2002-06-20

Inventor： Dmitry Chizhik ,  Hao Xu

IPC: H04B001/10

CPC classification number: H04L27/367 ,  H04B7/01 ,  H04L1/0656

Abstract: A method and apparatus for reducing the observed rate of change of the channel characteristics in a system with multiple antennas at a mobile terminal. The slowing down of the observed channel fluctuations is effectuated on the downlink by either calculating or receiving signals that have a similar Doppler shift, referred to herein as Doppler-compensatable signals, and processing one or more of the Doppler-compensatable signals to compensate for Doppler shift. The slowing down of the observed channel fluctuations is effectuated on the uplink by pre-compensating symbol streams with the Doppler shift associated with the direction in which they are transmitted, so that the observed Doppler shift of these signals when they are received is reduced or even eliminated.

Abstract translation: 一种用于在移动终端处降低具有多个天线的系统中的信道特性的观察到的变化率的方法和装置。 观察到的信道波动的减慢通过计算或接收具有类似多普勒频移的信号而在下行链路上实现，这里称为多普勒可补偿信号，并且处理多普勒可补偿信号中的一个或多个以补偿多普勒 转移。 观察到的信道波动的减慢通过预先补偿具有与它们被发送的方向相关联的多普勒频移的符号流来实现上行链路，使得当这些信号被接收时观察到的这些信号的多普勒频移减少甚至 消除了

公开(公告)号：US20040141566A1

公开(公告)日：2004-07-22

申请号：US10737398

申请日：2003-12-16

Inventor： Young-Doo Kim ,  Inhyoung Kim ,  Heejung Yu ,  Jihoon Choi ,  Taehyun Jeon ,  Jae-Young Ahn ,  Yong-Hoon Lee

IPC: H04L001/02

CPC classification number: H04B7/0891 ,  H04B7/0417 ,  H04B7/0626 ,  H04B7/0697 ,  H04L1/0003 ,  H04L1/0656 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0028 ,  H04L5/0046 ,  H04L5/006 ,  H04W52/42

Abstract: An apparatus for adaptively modulating/demodulating signals in a multi-input multi-output (MIMO) system having a layered time-space architecture detector and a method thereof is disclosed. The apparatus includes: a bit and power allocation information calculator for deciding an equivalent channel gain in a reverse order of Vertical-Bell laboratories Space Time (V-BLAST) based on MIMO channel information feedbacked from a receiver and determining the number of bits and transmission power to be transmitted to each transmitting antenna by using the equivalent channel gain; and adaptive modulation means for modulating signal of each layer with corresponding modulation method based on the determined number of bits and transmitting power, controlling the transmitting power and transmitting the adaptively modulated signal through each transmitting antenna. The present invention can improve performance without increase of implementation complexity and easily expand to MIMO-OFDM system by adaptively modulating and demodulating signals in reverse order of conventional V-BLAST detection method.

Abstract translation: 公开了一种用于在具有分层时空架构检测器及其方法的多输入多输出（MIMO）系统中自适应地调制/解调信号的装置。 该装置包括：位和功率分配信息计算器，用于基于从接收机反馈的MIMO信道信息来确定垂直贝尔实验室空时（V-BLAST）的相反顺序的等效信道增益，并确定比特数和传输次数 通过使用等效信道增益发送到每个发射天线的功率; 以及自适应调制装置，用于根据所确定的比特数和发送功率，通过相应的调制方法对每一层的信号进行调制，控制发送功率，并通过每个发送天线发送自适应调制信号。 本发明可以通过以常规V-BLAST检测方法的相反顺序自适应调制和解调信号，而不增加实现复杂度并且容易地扩展到MIMO-OFDM系统。

公开(公告)号：US20040052235A1

公开(公告)日：2004-03-18

申请号：US10245233

申请日：2002-09-17

Applicant: Lucent Technologies Inc.

Inventor： Gerard J. Foschini

IPC: H04B007/216

CPC classification number: H04B7/0891 ,  H04B7/0669 ,  H04L1/0656

Abstract: The present invention is directed to a formatter, a method of formatting encoded symbols and a wireless communication system employing the same. In one embodiment, the formatter includes a symbol generator that provides a plurality of encoded symbols from a bit stream. The formatter also includes a symbol mapping organizer that maps the plurality of encoded symbols into information cells, each having a unique space coordinate, time coordinate and degree of freedom within a frequency band. The information cells are arranged in a parallelopiped communication resource volume.

Abstract translation: 本发明涉及一种格式化器，一种格式化编码符号的方法和一种使用其的无线通信系统。 在一个实施例中，格式化器包括从比特流提供多个编码符号的符号发生器。 格式化器还包括将多个编码符号映射到信息单元中的符号映射管理器，每个信息单元在频带内具有唯一的空间坐标，时间坐标和自由度。 信息单元被布置成平行六面体通信资源卷。

公开(公告)号：US20040028157A1

公开(公告)日：2004-02-12

申请号：US10385666

申请日：2003-03-12

Applicant: Kabushiki Kaisha Toshiba

Inventor： Tsuguhide Aoki ,  Shuichi Obayashi

IPC: H04L001/02 ,  H04B007/10

CPC classification number: H04L1/006 ,  H04B7/0848 ,  H04L1/0054 ,  H04L1/0656 ,  Y02D70/444

Abstract: The present invention has a N pieces of receiving antennas, a propagation path characterization estimator, a weight generator for interference canceller, an array processing interference canceller, a weight generator for signal estimator, a signal estimator, a transmission signal classification apparatus, and a decoding order decision apparatus. The antenna inference elimination circuit eliminates only signal component relating to transmission signal component which does not belong to groups. The signal estimator performs separation and decoding of the transmission signal belonging to the group. The transmission signal classification apparatus classifies the transmission signals from sets of the transmission antennas in which a cross-correlation value of the vector is larger than a threshold value, into one group, and classifies the transmission signal in which the cross-correlation value is smaller than the threshold value, into another group.

Abstract translation: 本发明具有N条接收天线，传播路径特性估计器，用于干扰消除器的权重发生器，阵列处理干扰消除器，用于信号估计器的加权发生器，信号估计器，传输信号分类装置和解码器 订单决定装置。 天线推断消除电路仅消除与不属于组的传输信号分量相关的信号分量。 信号估计器执行属于该组的传输信号的分离和解码。 发送信号分类装置将来自该矢量的互相关值大于阈值的发送天线的发送信号分类为一组，对互相关值越小的发送信号进行分类 超过阈值，进入另一组。

公开(公告)号：US06510173B1

公开(公告)日：2003-01-21

申请号：US09806805

申请日：2001-04-03

Applicant: Alexandr Vasillevich Garmonov ,  Yuri Evgenievich Karpitski

Inventor： Alexandr Vasillevich Garmonov ,  Yuri Evgenievich Karpitski

IPC: H04B169

CPC classification number: H04L1/0071 ,  H04J13/0077 ,  H04L1/0625 ,  H04L1/0631 ,  H04L1/0656 ,  H04L1/0668 ,  H04L1/08

Abstract: An information stream of binary symbols is divided into serial packets of N binary symbols. The method further includes serial-parallel conversion of binary symbols in each serial packet and repeating N times the parallel packet thus obtained in order to form a serial-parallel packet of binary symbols. The binary symbols are permuted in the duration interval of each serial-parallel packet, and orthogonal codes generated according to the above binary symbol permutation are then applied. A space-diversity channel is then assigned to each serial group of the serial-parallel packet of coded binary symbols thus obtained. All the serial groups of coded binary symbols, each coded binary symbol having been previously spread by a user spreading code, as well as pilot signals of the corresponding space diversity channels are simultaneously transmitted. The method also involves generating on the reception side a serial packet of soft decisions that corresponds to the serial packet of binary symbols on the transmission side.

Abstract translation: 二进制符号的信息流被分成N个二进制符号的串行分组。 该方法还包括串行并行转换每个串行分组中的二进制符号，并重复N次获得的并行分组，以便形成二进制符号的并行分组。 二进制符号在每个串行并行包的持续时间间隔内被置换，然后应用根据上述二进制符号排列产生的正交码。 然后将空间分集信道分配给由此获得的编码二进制符号的串行并行分组的每个串行组。 编码二进制符号的所有串行组，先前已经由用户扩展码扩展的每个编码二进制符号以及对应的空间分集信道的导频信号被同时发送。 该方法还包括在接收侧产生与发送侧的二进制符号的串行分组相对应的软判决的串行分组。

公开(公告)号：US09629155B2

公开(公告)日：2017-04-18

申请号：US15082523

申请日：2016-03-28

Applicant: Apple Inc.

Inventor： Hang Zhang ,  Jianglei Ma ,  Ming Jia ,  Sophie Vrzic ,  Mo-Han Fong ,  Dong-Sheng Yu ,  Hua Xu

IPC: H04W28/04 ,  H04W72/04 ,  H04B7/12 ,  H04L5/00 ,  H04L25/02 ,  H04L29/06 ,  H04B7/06 ,  H04L1/00 ,  H04L1/06 ,  H04L1/18 ,  H04L25/03 ,  H04L27/26

CPC classification number: H04W72/0446 ,  H04B7/02 ,  H04B7/0669 ,  H04B7/12 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0071 ,  H04L1/0656 ,  H04L1/1812 ,  H04L1/1887 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0039 ,  H04L5/0041 ,  H04L5/0042 ,  H04L5/0046 ,  H04L5/0048 ,  H04L5/0051 ,  H04L5/0053 ,  H04L5/006 ,  H04L5/0085 ,  H04L5/0096 ,  H04L25/0226 ,  H04L25/0228 ,  H04L25/03057 ,  H04L27/2627 ,  H04L27/2655 ,  H04L65/1066 ,  H04W72/0453

Abstract: Systems and methods for OFDM channelization are provided that allow for the coexistence of sub-band channels and diversity channels. Methods of defining diversity sub-channels and sub-band sub-channels are provided and systematic channel definition and labeling schemes are provided.

公开(公告)号：US20170026096A1

公开(公告)日：2017-01-26

申请号：US15288706

申请日：2016-10-07

Applicant: LG Electronics Inc.

Inventor： Dong Wook Roh ,  Bong Hoe Kim ,  Young Woo Yun ,  Dong Youn Seo ,  Joon Kui Ahn ,  Ki Jun Kim

IPC: H04B7/04 ,  H04L1/08

CPC classification number: H04B7/0473 ,  H04B7/0691 ,  H04B7/0697 ,  H04B7/10 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0011 ,  H04L1/0026 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0061 ,  H04L1/0066 ,  H04L1/0067 ,  H04L1/0068 ,  H04L1/007 ,  H04L1/0071 ,  H04L1/06 ,  H04L1/0656 ,  H04L1/08 ,  H04L1/1812 ,  H04L5/0023 ,  H04L5/0039 ,  H04L25/0204 ,  H04L25/0248 ,  H04L2025/03414 ,  H04L2025/03426

Abstract: A method for indicating a combination between a codeword and a layer in a MIMO communication, system, a layer mapping method, and a data transmission method using the same are disclosed. A minimum number of codeword-layer mapping combinations from among all available combinations based on the' numbers of all codewords and all layers are pre-defined in consideration of a ratio of a codeword to a layer, a reception performance of a receiver, and reduction of combinations, so that a data transmission method using the predefined combinations is implemented. If a.specific one codeword is mapped to at least two layers, a diversity gain can be acquired.

Abstract translation: 公开了一种用于指示MIMO通信中的码字和层之间的组合的方法，系统，层映射方法和使用该组合的数据传输方法。 考虑到码字与层的比例，接收机的接收性能和减少量，预先定义了基于所有码字和所有层的所有可用组合的码字层映射组合的最小数量 的组合，从而实现使用预定义组合的数据传输方法。 如果特定的一个码字被映射到至少两个层，则可以获取分集增益。

公开(公告)号：US09325394B2

公开(公告)日：2016-04-26

申请号：US13953812

申请日：2013-07-30

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Yanmeng Sun

IPC: H04J3/00 ,  H04B7/04 ,  H04L1/00 ,  H04L1/06

CPC classification number: H04B7/0417 ,  H04B1/04 ,  H04L1/0001 ,  H04L1/0015 ,  H04L1/0017 ,  H04L1/0026 ,  H04L1/0028 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0656 ,  H04L1/0687

Abstract: A MIMO ARC transmitter derives demux streams (15, 20) carrying different parts of the information, at given data rates, processes each demux stream by coding and modulation (25, 30) before transmission over the channels, and varies (50, 165) the coding or modulation according to channel conditions, and controls the data rates (50, 155) according to conditions of the channels independently of the variations in coding and modulation. The separate control of processing and of data rates for each demux stream can provide a better balance of rapid response to changing conditions and efficiency in less rapidly changing conditions. The frequency of updating the processing can be limited since these take more time to adapt in the receiver. Sensitivity to rapid changes can be achieved by the data rate changes since these involve less overhead than changes in the processing.