公开(公告)号：US20090225888A1

公开(公告)日：2009-09-10

申请号：US12388250

申请日：2009-02-18

Applicant: Min Seok Noh ,  Yeong Hyeon Kwon ,  Sung-Ho Moon ,  Jin Sam Kwak ,  Dong Cheol Kim ,  Seung Hee Han ,  Hyun Woo Lee ,  Jin Soo Choi

Inventor： Min Seok Noh ,  Yeong Hyeon Kwon ,  Sung-Ho Moon ,  Jin Sam Kwak ,  Dong Cheol Kim ,  Seung Hee Han ,  Hyun Woo Lee ,  Jin Soo Choi

IPC: H04L27/28 ,  H04B7/02

CPC classification number: H04L1/0643 ,  H04B7/0413 ,  H04L1/0606 ,  H04L1/0656 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0044 ,  H04L5/0048

Abstract: A method for uplink transmission in an OFDMA system is provided. The subcarrier transmission method includes arranging 4 pilot REs at different positions of a frequency axis in a basic unit when the basic unit includes 4 subcarriers on the frequency axis and 6 OFDM(A) symbols in a time axis, arranging data REs at remaining positions of the basic unit, and transmitting the basic unit to a receiving end.

公开(公告)号：US07583747B1

公开(公告)日：2009-09-01

申请号：US11095430

申请日：2005-03-31

Applicant: Mohamed O. Damen ,  Norman C. Beaulieu ,  Hesham El Gamal

Inventor： Mohamed O. Damen ,  Norman C. Beaulieu ,  Hesham El Gamal

IPC: H04B7/02

CPC classification number: H04B7/0669 ,  H04L1/0625 ,  H04L1/0656 ,  H04L27/2626

Abstract: Space-time code, and methods for constructing space-time codes are provided. The space-time coder performs a respective linear transformation on each of P sets of K modulated symbols of a modulated symbol stream to produce P sets of T linearly transformed symbols, applies a respective phase rotation to each set of T linearly transformed symbols to produce a respective set of T phase rotated symbols, and performs a threading operation on the sets of T phase rotated symbols to produce P threaded sequences that define M output sequences; the threading operation being such that each threaded sequence is an allocation of output sequences over time of a respective one of the P sets of T phase rotated symbols in which all of the output sequences are used by each threaded sequence; during each of T symbol periods, a respective one of the P threaded sequences includes a symbol from one of the P sets of phase rotated symbols; and at least one symbol from each set of phase rotated symbols appears in each output sequence; where M>=2, 2 =M and M>=K.

Abstract translation: 提供时空代码和构建时空代码的方法。 空时编码器对调制符号流的K个调制符号的P组中的每一个执行相应的线性变换，以产生T个线性变换符号的P集合，将相应的相位旋转应用于每组T个线性变换的符号，以产生 相应的T相旋转符号组，并对T相旋转符号组进行线程操作，以产生定义M个输出序列的P线程序列; 所述线程操作使得每个线程序列是随着T个相位旋转符号的P组中的相应一个的时间的输出序列的分配，其中所有输出序列由每个线程序列使用; 在T个符号周期的每一个期间，P个线程序列中的相应一个包括来自P组相位旋转符号之一的符号; 并且每个输出序列中出现来自每组相位旋转符号的至少一个符号; 其中M> = 2，2 <= P <= M，T> = M，M> = K。

公开(公告)号：US20090063106A1

公开(公告)日：2009-03-05

申请号：US11662854

申请日：2005-09-14

Applicant: Andreas Burg ,  Moritz Borgmann ,  Markus Wenk ,  Martin Zellweger

Inventor： Andreas Burg ,  Moritz Borgmann ,  Markus Wenk ,  Martin Zellweger

IPC: G06F17/10

CPC classification number: H04L25/03242 ,  H04L1/0656 ,  H04L25/03203

Abstract: The method for decoding a received signal in a multiple input/multiple output system uses QR-decomposition of the linear channel matrix, but then applies a non-Euclidean norm during tree traversal. Two separate hardware units, namely an MCU and a MEU, art provided for concurrent operation. The MCU determines a next child node, while the MEU determines next best parent nodes on the previously processed tree levels, which makes it possible to retrace the path to a next starting node without investing dedicated processing steps (e.g., cycles). On each tree level, the possible coordinates are grouped into several circular sets in the complex plane, and a series of decision boundaries is calculated for each set that allows a quick evaluation of the optimum coordinate in each set.

Abstract translation: 用于对多输入/多输出系统中的接收信号进行解码的方法使用线性信道矩阵的QR分解，然后在树遍历期间应用非欧几里得范数。 两个独立的硬件单元，即MCU和MEU，用于并发操作。 MCU确定下一个子节点，而MEU确定先前处理的树级别上的下一个最佳父节点，这使得可以在不投入专用处理步骤（例如周期）的情况下将路径回溯到下一个起始节点。 在每个树级上，可能的坐标被分组成复平面中的几个圆形集合，并且为每个集合计算出一系列决策边界，其允许快速评估每个集合中的最佳坐标。

公开(公告)号：US20090059880A1

公开(公告)日：2009-03-05

申请号：US12261708

申请日：2008-10-30

Applicant: Shinichi KURODA

Inventor： Shinichi KURODA

IPC: H04W4/00

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：US20090044069A1

公开(公告)日：2009-02-12

申请号：US11994624

申请日：2006-07-04

Applicant: Yutaka Murakami ,  Shutai Okamura ,  Kiyotaka Kobayashi ,  Masayuki Orihashi

Inventor： Yutaka Murakami ,  Shutai Okamura ,  Kiyotaka Kobayashi ,  Masayuki Orihashi

IPC: H03M13/27 ,  H04J11/00 ,  G06F11/10

CPC classification number: H04L1/0041 ,  H03M13/13 ,  H03M13/255 ,  H03M13/2721 ,  H03M13/2909 ,  H04L1/0003 ,  H04L1/0057 ,  H04L1/0071 ,  H04L1/0656 ,  H04L5/0023

Abstract: A transmitter apparatus wherein a relatively simple structure is used to suppress burst errors without changing the block sizes of encoded blocks even when the number of modulation multi-values is increased. There are included an encoding part (11) that subjects transport data to a block encoding process to form block encoded data; a modulating part (15) that modulates the block encoded data to form data symbols; and an arranging (interleaving) part (12) that arranges (interleaves) the block encoded data in such a manner that the intra-block encoded data of the encoded blocks, which include their respective single different data symbol, get together, and then supplies the arranged (interleaved) block encoded data to the modulating part (15). In this way, there can be provided a transmitter apparatus (10) wherein a relatively simple structure is used to suppress burst errors without changing the block sizes of encoded blocks even when the number of modulation multi-values is increased.

Abstract translation: 一种发射机装置，即使当调制多值的数量增加时，使用相对简单的结构来抑制突发错误，而不改变编码块的块大小。 包括编码部分（11），其对传输数据进行块编码处理以形成块编码数据; 调制部分（15），其对所述块编码数据进行调制以形成数据符号; 以及排列（交织）部分（12），其以使得包括它们各自的单个不同数据符号的编码块的块内编码数据在一起的方式布置（交织）块编码数据，然后提供 将经排列（交错）块编码的数据传送到调制部分（15）。 以这种方式，可以提供一种发射机装置（10），其中即使当调制多值的数量增加时，使用相对简单的结构来抑制突发错误，而不改变编码块的块大小。

公开(公告)号：US20080285488A1

公开(公告)日：2008-11-20

申请号：US12112728

申请日：2008-04-30

Applicant: J. Rodney Walton ,  Mark S. Wallace ,  John W. Ketchum ,  Steven J. Howard

Inventor： J. Rodney Walton ,  Mark S. Wallace ,  John W. Ketchum ,  Steven J. Howard

IPC: H04J3/00 ,  H04K1/10

CPC classification number: H04L5/0048 ,  H04B7/022 ,  H04B7/0421 ,  H04B7/043 ,  H04B7/0443 ,  H04B7/0669 ,  H04B7/0689 ,  H04B7/0697 ,  H04B7/0854 ,  H04B7/0871 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0017 ,  H04L1/0025 ,  H04L1/0059 ,  H04L1/0061 ,  H04L1/0069 ,  H04L1/0071 ,  H04L1/0606 ,  H04L1/0625 ,  H04L1/0656 ,  H04L1/08 ,  H04L1/16 ,  H04L1/1887 ,  H04L5/0023 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/0228 ,  H04L25/0248 ,  H04L25/03343 ,  H04L27/2602 ,  H04L27/2607 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04W28/20 ,  H04W28/22 ,  H04W52/42 ,  H04W52/50 ,  H04W72/12 ,  H04W84/12

Abstract: A multiple-access MIMO WLAN system that employs MIMO, OFDM, and TDD. The system (1) uses a channel structure with a number of configurable transport channels, (2) supports multiple rates and transmission modes, which are configurable based on channel conditions and user terminal capabilities, (3) employs a pilot structure with several types of pilot (e.g., beacon, MIMO, steered reference, and carrier pilots) for different functions, (4) implements rate, timing, and power control loops for proper system operation, and (5) employs random access for system access by the user terminals, fast acknowledgment, and quick resource assignments. Calibration may be performed to account for differences in the frequency responses of transmit/receive chains at the access point and user terminals. The spatial processing may then be simplified by taking advantage of the reciprocal nature of the downlink and uplink and the calibration.

Abstract translation: 采用MIMO，OFDM和TDD的多接入MIMO WLAN系统。 系统（1）使用具有多个可配置传输信道的信道结构，（2）支持基于信道条件和用户终端能力可配置的多种速率和传输模式，（3）采用具有多种类型 （4）实现速率，定时和功率控制环路，实现系统正常运行，（5）采用随机接入方式进行系统接入，由用户终端 ，快速确认和快速的资源分配。 可以执行校准以考虑接入点和用户终端处的发射/接收链的频率响应的差异。 然后可以通过利用下行链路和上行链路的相互性质和校准来简化空间处理。

公开(公告)号：US07453947B2

公开(公告)日：2008-11-18

申请号：US10737398

申请日：2003-12-16

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

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

IPC: H04B7/02

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：US20080159426A1

公开(公告)日：2008-07-03

申请号：US12005992

申请日：2007-12-28

Applicant: Young-Ho Jung ,  Myeon-Kyun Cho ,  Jin-Gon Joung ,  Yong-Hoon Lee

Inventor： Young-Ho Jung ,  Myeon-Kyun Cho ,  Jin-Gon Joung ,  Yong-Hoon Lee

IPC: H04L27/04 ,  H04L27/28

CPC classification number: H04L1/0643 ,  H04B7/0634 ,  H04B7/0669 ,  H04B7/0891 ,  H04L1/0656 ,  H04L25/0204 ,  H04L2025/03426

Abstract: Disclosed is an apparatus and a method for signal transmission and reception according to a pre-processing scheme in a MIMO mobile communication system. The method includes: inputting a symbol; and pre-processing the input symbol according to a pre-processing matrix corresponding to pre-processing matrix information and transmitting the pre-processed symbol through a corresponding transmission antenna, wherein the pre-processing matrix is determined in accordance with a number of transmission antennas and a rate used in the MIMO mobile communication system.

Abstract translation: 公开了根据MIMO移动通信系统中的预处理方案的信号发送和接收的装置和方法。 该方法包括：输入符号; 并根据与预处理矩阵信息相对应的预处理矩阵对输入符号进行预处理，并通过相应的发送天线发送预处理符号，其中根据发送天线的数量来确定预处理矩阵 以及在MIMO移动通信系统中使用的速率。

公开(公告)号：US20080144733A1

公开(公告)日：2008-06-19

申请号：US11842252

申请日：2007-08-21

Applicant: Hesham ElGamal ,  Aykut Bultan ,  Chang-Soo Koo

Inventor： Hesham ElGamal ,  Aykut Bultan ,  Chang-Soo Koo

IPC: H04B7/02 ,  H04L27/28

CPC classification number: H04L1/0003 ,  H04L1/0606 ,  H04L1/0618 ,  H04L1/0625 ,  H04L1/0643 ,  H04L1/0656 ,  H04L1/0687 ,  H04L1/0693 ,  H04L1/1819

Abstract: The downlink (DL) communication of single channel codewords is supported by providing a multiple-input multiple-output (MIMO) transmitter and receiver. The transmitter includes NT transmit antennas for transmitting spatial streams to a receiver having NR receive antennas, a precoder and a space-time or space-frequency matrix construction unit in communication with the precoder and the transmit antennas. The space-time or space-frequency matrix construction unit constructs a matrix that defines a threaded algebraic space-time (TAST) codeword based on a number of virtual antennas, NV, and the number of transmit antennas, NT. The transmitter operates in an open loop mode when no feedback information from the receiver is available, a semi-open loop mode when channel rank information is available, and a closed loop mode when channel state information (CSI) is available. The receiver is configured to provide feedback to the transmitter on a per received spatial stream basis

Abstract translation: 通过提供多输入多输出（MIMO）发射机和接收机来支持单信道码字的下行链路（DL）通信。 发射机包括用于将空间流发送到具有N个N个接收天线的接收机的N T个发射天线，通信中的预编码器和时空或空时矩阵构造单元 与预编码器和发射天线。 空时或空频矩阵构造单元构造一个矩阵，该矩阵基于多个虚拟天线N N V N定义线性代数空时（TAST）码字，并且发射天线的数量 ，N T T。 当没有来自接收机的反馈信息可用时，发射机以开环模式工作，当信道秩信息可用时为半开环模式，当信道状态信息（CSI）可用时为闭环模式）。 接收器被配置为在每个接收到的空间流的基础上向发射机提供反馈

公开(公告)号：US20080137782A1

公开(公告)日：2008-06-12

申请号：US11930047

申请日：2007-10-30

Applicant: Seung-Jae BAHNG ,  Young-Jo BANG ,  Youn-Ok PARK

Inventor： Seung-Jae BAHNG ,  Young-Jo BANG ,  Youn-Ok PARK

IPC: H03D1/00 ,  H04L1/02

CPC classification number: H04B7/0413 ,  H04L1/0656 ,  H04L25/0204 ,  H04L25/0246

Abstract: The present invention relates to a signal detection method and a receiving apparatus in a multiple input multiple output (MIMO) system. More particularly, the present invention relates to a signal detection device in a MIMO system using a spatial multiplexing (SM) method. In the signal detection method, a channel is estimated and layers are rearranged according to a predetermined layer arrangement rule. QR-decomposition is performed by using a rearranged system model, all constellation points in a symbol of a layer having the lowest reliability are considered, and symbols are detected by using a sequential interference elimination method.

Abstract translation: 本发明涉及多输入多输出（MIMO）系统中的信号检测方法和接收装置。 更具体地，本发明涉及使用空间复用（SM）方法的MIMO系统中的信号检测装置。 在信号检测方法中，估计信道并根据预定层布置规则重新布置层。 通过使用重排系统模型进行QR分解，考虑具有最低可靠性的层的符号中的所有星座点，并且通过使用顺序干扰消除方法来检测符号。