公开(公告)号：US20060291544A1

公开(公告)日：2006-12-28

申请号：US11412388

申请日：2006-04-27

申请人： Matthew Fischer ,  Joonsuk Kim ,  Christopher Hansen ,  Jason Trachewsky

发明人： Matthew Fischer ,  Joonsuk Kim ,  Christopher Hansen ,  Jason Trachewsky

IPC分类号： H04L5/16 ,  H04L1/02

CPC分类号： H04W80/00 ,  H04B7/0421 ,  H04B7/0617 ,  H04B7/0628 ,  H04B7/0634 ,  H04L1/0026 ,  H04L1/0045 ,  H04L1/0068 ,  H04L1/06 ,  H04L27/2601

摘要： A method for feeding back transmitter beamforming information from a receiving wireless communication device to a transmitting wireless communication device includes a receiving wireless communication device receiving a preamble sequence from the transmitting wireless device. The receiving wireless device estimates a channel response based upon the preamble sequence and then determines an estimated transmitter beamforming unitary matrix based upon the channel response and a receiver beamforming unitary matrix. The receiving wireless device then decomposes the estimated transmitter beamforming unitary matrix to produce the transmitter beamforming information and then wirelessly sends the transmitter beamforming information to the transmitting wireless device.

公开(公告)号：US09379858B2

公开(公告)日：2016-06-28

申请号：US12794712

申请日：2010-06-04

申请人： Vinko Erceg ,  Joseph Paul Lauer ,  Matthew James Fischer ,  Peiman Amini ,  Joonsuk Kim

发明人： Vinko Erceg ,  Joseph Paul Lauer ,  Matthew James Fischer ,  Peiman Amini ,  Joonsuk Kim

IPC分类号： H04W40/00 ,  H04L5/00 ,  H04B7/02 ,  H04L1/00 ,  H04L1/06 ,  H04L1/16 ,  H04W88/02

CPC分类号： H04W72/0453 ,  H04L1/0009 ,  H04L1/0065 ,  H04L1/0068 ,  H04L1/0071 ,  H04L1/0618 ,  H04L1/1607 ,  H04L5/0023 ,  H04L27/2602 ,  H04W88/02

摘要： Transmission coordination within multiple user, multiple access, and/or MIMO wireless communications. Within wireless communication systems, there can be various wireless communication devices therein that are not all compliant with a common capability set, communication protocol, communication standard, recommended practice, etc. For example, some communication systems may have some wireless communication devices characterized as ‘legacy’ wireless communication devices, and other wireless communication devices therein may be newer and compliant with newer capability sets, communication protocols, communication standards, recommended practices, etc. In such instances, coordination of transmissions among the various wireless communication devices may be made, when performing simultaneous transmissions, by ensuring that transmissions of devices on different channels is made when aligned on a common boundary of an OFDM symbol. Alternatively, such simultaneous transmissions may be made when offset by some multiple of OFDM symbol duration. When performing non-simultaneous transmissions, transmissions may be made based on channel availability.

摘要翻译： 多用户，多路访问和/或MIMO无线通信中的传输协调。 在无线通信系统中，其中可以有各种各样的无线通信设备，它们都不符合公共能力集，通信协议，通信标准，推荐做法等。例如，一些通信系统可以具有一些无线通信设备， 传统“无线通信设备和其他无线通信设备可能更新，并且符合更新的能力集，通信协议，通信标准，推荐做法等。在这种情况下，可以进行各种无线通信设备之间的传输协调， 当执行同时传输时，通过确保在OFDM符号的公共边界上对准时不同信道上的设备的传输。 或者，当偏移OFDM符号持续时间的某个倍数时，可以进行这种同时传输。 当执行非同时传输时，可以基于信道可用性进行传输。

公开(公告)号：US08346262B2

公开(公告)日：2013-01-01

申请号：US13535024

申请日：2012-06-27

申请人： Joonsuk Kim

发明人： Joonsuk Kim

IPC分类号： H04W36/00 ,  H04W40/00

CPC分类号： H04B7/0456 ,  H04B7/0417 ,  H04B7/043 ,  H04B7/0634 ,  H04B7/0639 ,  H04L27/2626 ,  H04L27/2647

摘要： Aspects of a method and system for utilizing tone grouping with Givens rotations to reduce overhead associated with explicit feedback information are presented. In one aspect of the invention, Givens matrices may be utilized to reduce a quantity of information communicated in explicit feedback information via an uplink RF channel. The explicit feedback information may include specifications for a feedback beamforming matrix that may be utilized when transmitting signals via a corresponding downlink RF channel. The feedback beamforming matrix may represent a rotated version of an un-rotated matrix. The Givens matrices may be utilized to apply one or more Givens rotations to un-rotated matrix. The rotated matrix may reduce the quantity of information communicated in the explicit feedback information. The quantity of information communicated in the explicit feedback information may be further reduced by utilizing tone grouping.

摘要翻译： 提出了利用Givens旋转利用音调分组以减少与显式反馈信息相关的开销的方法和系统的方面。 在本发明的一个方面，可以利用Givens矩阵来经由上行链路RF信道来减少在显式反馈信息中传送的信息量。 显式反馈信息可以包括当经由相应的下行链路RF信道发送信号时可以使用的反馈波束成形矩阵的规范。 反馈波束形成矩阵可以表示未旋转矩阵的旋转版本。 Givens矩阵可以用于将一个或多个Givens旋转应用于未旋转的矩阵。 旋转的矩阵可以减少在显式反馈信息中传达的信息的数量。 可以通过利用音调分组来进一步减少在显式反馈信息中传送的信息量。

公开(公告)号：US08233552B2

公开(公告)日：2012-07-31

申请号：US11327690

申请日：2006-01-06

申请人： Joonsuk Kim

发明人： Joonsuk Kim

IPC分类号： H04W4/00 ,  H04K1/00

CPC分类号： H04L1/0606 ,  H04B7/0417 ,  H04B7/0617 ,  H04B7/0634 ,  H04B7/0639 ,  H04B7/0663 ,  H04L1/001 ,  H04L1/0029 ,  H04L1/0054 ,  H04L1/0068 ,  H04L1/0071 ,  H04L1/0073

摘要： Aspects of a method and system for utilizing Givens rotation expressions for asymmetric beamforming matrices in explicit feedback information are presented. In one aspect of the invention, Givens matrices may be utilized to reduce a quantity of information communicated in explicit feedback information via an uplink RF channel. The explicit feedback information may include specifications for a feedback beamforming matrix that may be utilized when transmitting signals via a corresponding downlink RF channel. The feedback beamforming matrix may represent a rotated version of an un-rotated matrix. The Givens matrices may be utilized to apply one or more Givens rotations to un-rotated matrix. The feedback beamforming matrix may be computed based on a matrix product of a plurality of Givens matrices. The feedback beamforming matrix may be encoded utilizing fewer bits than may be required to encode the un-rotated matrix.

公开(公告)号：US08098755B2

公开(公告)日：2012-01-17

申请号：US12190272

申请日：2008-08-12

申请人： Joonsuk Kim ,  Sirikiat Ariyavisitakul

发明人： Joonsuk Kim ,  Sirikiat Ariyavisitakul

IPC分类号： H04B7/02

CPC分类号： H04L25/03343 ,  H04L1/0026 ,  H04L1/0618 ,  H04L2025/03426 ,  H04L2025/03802

摘要： A method and system for beamforming in a multiple user multiple input multiple output (MIMO) communication system using a codebook may include a processor in a node B that enables generation of an interference cancellation matrix (WR). The interference cancellation matrix, also referred to as a matched filter, may enable a composite signal (Y) to be represented as a plurality of subsidiary signals (yi), each of which is transmitted by the node B for reception at a corresponding ith UE station. Each of the subsidiary signals yi may be generated based on a corresponding one of a plurality of data stream signals (xi). The processor may enable generation of a precoding matrix (WT) based on the interference cancellation matrix. A transmitter within the node B may enable generation of a plurality of signals based on the preceding matrix. The signals may be transmitted via a wireless communication medium.

摘要翻译： 在使用码本的多用户多输入多输出（MIMO）通信系统中的波束成形的方法和系统可以包括能够产生干扰消除矩阵（WR）的节点B中的处理器。 也称为匹配滤波器的干扰消除矩阵可以使得复合信号（Y）能够被表示为多个辅助信号（yi），每个辅助信号由节点B发送以在对应的第i个UE处接收 站。 辅助信号yi中的每一个可以基于多个数据流信号（xi）中的对应的一个生成。 处理器可以使得能够基于干扰消除矩阵生成预编码矩阵（WT）。 节点B内的发射机可以使得能够基于先前的矩阵生成多个信号。 信号可以经由无线通信介质发送。

公开(公告)号：US20110164578A1

公开(公告)日：2011-07-07

申请号：US12720945

申请日：2010-03-10

申请人： Joonsuk Kim ,  Sirikiat Lek Ariyavisitakul

发明人： Joonsuk Kim ,  Sirikiat Lek Ariyavisitakul

IPC分类号： H04W72/04

CPC分类号： H04L5/003 ,  H04L5/0016

摘要： A method and system for multiband user scheduling in a multiple user multiple input multiple output (MU-MIMO) communication system are presented. In one aspect of the method and system a plurality of users in a user group may be selectively assigned to individual frequency bands among a plurality of frequency bands (referred to as a multiband). In an exemplary aspect, a modified greedy user scheduling algorithm may be utilized for assigning users, selected from the user group, to each of the frequency bands. Assigned users for a given frequency band are determined based on channel norm values computed for each of the users in the user group and on chordal distances computed between users in the user group. Pairs of users, selected from the user group, are assigned to each frequency band in the multiband to maximize aggregate data rate capacity for the MIMO communication system.

摘要翻译： 提出了一种多用户多输入多输出（MU-MIMO）通信系统中多频段用户调度的方法和系统。 在方法和系统的一个方面，用户组中的多个用户可以被选择性地分配给多个频带（被称为多频带）中的各个频带。 在示例性方面，可以使用修改的贪心用户调度算法来将从用户组中选择的用户分配给每个频带。 基于针对用户组中的每个用户计算的信道范数值以及在用户组中的用户之间计算的弦距来确定给定频带的分配用户。 从用户组中选择的成对用户被分配给多频带中的每个频带，以最大化MIMO通信系统的汇总数据速率容量。

公开(公告)号：US07778366B2

公开(公告)日：2010-08-17

申请号：US11093054

申请日：2005-03-30

申请人： Joonsuk Kim

发明人： Joonsuk Kim

IPC分类号： H03D1/04

CPC分类号： H04L1/0668 ,  H04L25/0244

摘要： A MISO wireless LAN includes multiple inputs and a single output. The present invention includes a method and apparatus of compensating for time sensitive or frequency sensitive channel fading using zero forcing. The time sensitive channel fading is represented by the vector [H(t)], and the interference compensation is performed by multiplying the incoming data by a zero forcing factor that is determined as [(H*·H)−1·H*]. More specifically, the H* represents channel matching and (H*·H)−1 represents interference cancellation due to channel fading over time or frequency.

摘要翻译： MISO无线局域网包括多个输入和一个输出。 本发明包括使用零强制补偿时间敏感或频率敏感信道衰落的方法和装置。 时间敏感信道衰落由矢量[H（t）]表示，干扰补偿通过将输入数据乘以确定为[（H *·H）-1·H *]的零强制因子来执行， 。 更具体地，H *表示信道匹配，（H *·H）-1表示由于信道衰落随时间或频率引起的干扰消除。

公开(公告)号：US20100150260A1

公开(公告)日：2010-06-17

申请号：US12706042

申请日：2010-02-16

申请人： Sirikiat Lck Ariyavisitakul ,  Eric Ojard ,  Joonsuk Kim

发明人： Sirikiat Lck Ariyavisitakul ,  Eric Ojard ,  Joonsuk Kim

IPC分类号： H04B7/02

CPC分类号： H04L1/0631

摘要： Aspects of a method and system for minimizing effects of transmitter impairments in multiple input multiple output (MIMO) beamforming communication systems are presented. In one aspect of a system for minimizing effects of transmitter impairments, a MIMO transmitter may enable nulling of transmitter-induced noise by adjusting at least a portion of a plurality of signals transmitted based on a transmitter error vector magnitude (EVM). The transmitter may enable transmission of the plurality of signals subsequent to the nulling. In another aspect of a system for minimizing effects of transmitter impairments a MIMO receiver may enable nulling of transmitter-induced noise contained in a plurality of received signals based on a transmitter EVM. Each of the plurality of received signals may include information contained in a plurality of spatial streams. The receiver may enable detecting estimated values for the information contained in the plurality of spatial streams based on the nulling.

摘要翻译： 提出了一种用于最小化多输入多输出（MIMO）波束成形通信系统中的发射机损伤影响的方法和系统的方面。 在用于最小化发射机损伤的影响的系统的一个方面，MIMO发射机可以通过调整基于发射机误差矢量幅度（EVM）发送的多个信号的至少一部分来实现发射机诱导的噪声的归零。 发射机可以使得能够在归零之后传输多个信号。 在用于最小化发射机损伤的影响的系统的另一方面，MIMO接收机可以基于发射机EVM来使包含在多个接收信号中的发射机诱发的噪声归零。 多个接收信号中的每一个可以包括包含在多个空间流中的信息。 接收机可以使得能够基于归零来检测包含在多个空间流中的信息的估计值。

公开(公告)号：US07738584B2

公开(公告)日：2010-06-15

申请号：US11168838

申请日：2005-06-28

申请人： Joonsuk Kim

发明人： Joonsuk Kim

IPC分类号： H04L1/02

CPC分类号： H04B7/0634 ,  H04B7/0417

摘要： A method for beamforming in a wireless communication begins by receiving a baseband signal. The method continues by receiving a feedback signal that includes a subset of angles, wherein a set of angles provide polar coordinates for a unitary matrix and wherein the subset of angles is a subset of the set of angles. The method continues by determining at least one remaining angle of the set of angles based on the subset of angles. The method continues by determining the polar coordinates for the unitary matrix. The method continues by digitally beamforming the baseband signal using the unitary matrix.

摘要翻译： 无线通信中的波束成形方法通过接收基带信号开始。 该方法通过接收包括角度子集的反馈信号而继续，其中一组角度为单一矩阵提供极坐标，并且其中角度子集是该组角度的子集。 该方法通过基于角度子集确定该组角度的至少一个剩余角度来继续。 该方法通过确定酉矩阵的极坐标继续。 该方法继续通过使用酉矩阵对基带信号进行数字波束成形。

公开(公告)号：US07715350B2

公开(公告)日：2010-05-11

申请号：US10675478

申请日：2003-09-30

申请人： Amit G. Bagchi ,  Joseph Paul Lauer ,  Srinivasa H. Garlapati ,  Rohit V. Gaikwad ,  Joonsuk Kim ,  Paul Anthony Lettieri

发明人： Amit G. Bagchi ,  Joseph Paul Lauer ,  Srinivasa H. Garlapati ,  Rohit V. Gaikwad ,  Joonsuk Kim ,  Paul Anthony Lettieri

IPC分类号： H04Q7/24

CPC分类号： H04W40/02 ,  H04L27/0012 ,  H04W84/12 ,  Y02D70/142 ,  Y02D70/30

摘要： Classifier for communication device. A communication device includes a classifier and a number of PHY (physical layer) receivers communicatively coupled thereto that enable the communication device to process various received signal types. Each of the PHY receivers is operable to perform pre-processing of a received frame (or packet) of data and to calculate a confidence level indicating whether the received frame is intended for that particular PHY receiver; this pre-processing does not involve processing (e.g., demodulation and/or decoding) of the received frame. Those PHY receivers having sufficiently high confidence levels assert claims to the classifier for the received frame. The classifier is operable to arbitrate between competing claims by 2 or more PHY receivers and to ensure that the received frame is provided to the PHY receiver for which it is intended.