公开(公告)号：US20070201575A1

公开(公告)日：2007-08-30

申请号：US11449413

申请日：2006-06-08

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

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

IPC分类号： H04L1/02

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：US20070104288A1

公开(公告)日：2007-05-10

申请号：US11327690

申请日：2006-01-06

申请人： Joonsuk Kim

发明人： Joonsuk Kim

IPC分类号： H04L1/02

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.

摘要翻译： 提出了一种在显式反馈信息中利用非对称波束成形矩阵的Givens旋转表达式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。 可以基于多个Givens矩阵的矩阵乘积来计算反馈波束形成矩阵。 反馈波束形成矩阵可以利用比编码未旋转矩阵所需要的位少的位来进行编码。

公开(公告)号：US20070104163A1

公开(公告)日：2007-05-10

申请号：US11327752

申请日：2006-01-06

申请人： Joonsuk Kim

发明人： Joonsuk Kim

IPC分类号： H04Q7/24

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：US20060274687A1

公开(公告)日：2006-12-07

申请号：US11183018

申请日：2005-07-14

申请人： Joonsuk Kim

发明人： Joonsuk Kim

IPC分类号： H04Q7/00

CPC分类号： H04L1/0071 ,  H04L1/0041 ,  H04L1/0054 ,  H04L1/0057 ,  H04L1/06

摘要： Aspects of a method and system for parsing bits in an interleaver for adaptive modulations in a multiple input multiple output (MIMO) wireless local area network (WLAN) system are provided. The interleaver may generate a lookup table, which is utilized to assign at least one binary bit of information, among a plurality of binary bits of information to be transmitted, to at least one of a plurality of spatial streams. The lookup table may be utilized to assign binary bits of information among the plurality of spatial streams to improve performance of a MIMO transceiver.

公开(公告)号：US20060239373A1

公开(公告)日：2006-10-26

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 ,  H04L27/00

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：US20050185730A1

公开(公告)日：2005-08-25

申请号：US11057842

申请日：2005-02-15

申请人： Christopher Hansen ,  Joonsuk Kim ,  Rajendra Moorti ,  Nambirajan Seshadri ,  Jason Trachewsky

发明人： Christopher Hansen ,  Joonsuk Kim ,  Rajendra Moorti ,  Nambirajan Seshadri ,  Jason Trachewsky

IPC分类号： H04L1/02

CPC分类号： H04L1/0066 ,  H04L1/0643 ,  H04L1/065 ,  H04L1/1671

摘要： A method of communicating data to M receiving antennas from N transmitting antennas, where M and N are integers and unequal, has the steps of sending a message to determine a number of transmit paths to be used, awaiting an acknowledgement message comprising a number of receiver paths, setting the number of transmit paths based on at least the acknowledgement message, producing data streams from outbound data based on the number of transmit paths, applying the data streams to a space/time encoder to produce encoded signals and transmitting the encoded signals from at least a portion of N transmitting antennas.

摘要翻译： 从N个发送天线向M个接收天线发送数据的方法，其中M和N是整数和不等的，具有发送消息以确定要使用的发送路径的数量的步骤，等待包括多个接收机的确认消息 至少基于确认消息设置发送路径的数量，基于发送路径的数量从出站数据生成数据流，将数据流应用到空间/时间编码器以产生编码信号并从 N个发射天线的至少一部分。

公开(公告)号：US08320283B2

公开(公告)日：2012-11-27

申请号：US13534905

申请日：2012-06-27

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.

摘要翻译： 提出了一种在显式反馈信息中利用非对称波束成形矩阵的Givens旋转表达式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。 可以基于多个Givens矩阵的矩阵乘积来计算反馈波束形成矩阵。 反馈波束形成矩阵可以利用比编码未旋转矩阵所需要的位少的位来进行编码。

公开(公告)号：US20120106603A1

公开(公告)日：2012-05-03

申请号：US13349282

申请日：2012-01-12

申请人： Joonsuk Kim ,  Sirikiat Ariyavisitakul

发明人： Joonsuk Kim ,  Sirikiat Ariyavisitakul

IPC分类号： H04B1/38

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 precoding 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预编码矩阵生成多个信号。 信号可以经由无线通信介质发送。

公开(公告)号：US08014353B2

公开(公告)日：2011-09-06

申请号：US12616086

申请日：2009-11-10

申请人： Joonsuk Kim

发明人： Joonsuk Kim

IPC分类号： H04L12/28

CPC分类号： H04L1/0013 ,  H04B7/0626 ,  H04L1/0003 ,  H04L1/0026 ,  H04L1/06

摘要： A method and system for bits and coding assignment utilizing Eigen beamforming with fixed rates for a closed loop WLAN is provided. Aspects of the method for communicating information in a communication system may comprise transmitting data via a plurality of radio frequency (RF) channels utilizing a plurality of transmitting antennas and receiving feedback information related to the plurality of RF channels. Bits may be assigned for transmission via at least one of the plurality of RF channels based on the feedback information. At least a portion of subsequent data having at least a first coding rate based on the assignment of bits may be transmitted via at least one of the plurality of RF channels. The method may also comprise receiving data via a plurality of RF channels utilizing a plurality of receiving antennas, and transmitting feedback information related to the plurality of RF channels.

摘要翻译： 提供了利用针对闭环WLAN的固定速率的特征波束形成的比特和编码分配的方法和系统。 用于在通信系统中传送信息的方法的方面可以包括利用多个发射天线经由多个射频（RF）信道发送数据，并且接收与多个RF信道有关的反馈信息。 可以基于反馈信息将位分配给经由多个RF信道中的至少一个的传输。 可以经由多个RF信道中的至少一个来发送具有至少基于比特分配的第一编码率的后续数据的至少一部分。 该方法还可以包括利用多个接收天线经由多个RF信道接收数据，以及发送与多个RF信道有关的反馈信息。

公开(公告)号：US20110158362A1

公开(公告)日：2011-06-30

申请号：US12708025

申请日：2010-02-18

申请人： Joonsuk Kim ,  Sirikiat Lek Ariyavisitakul

发明人： Joonsuk Kim ,  Sirikiat Lek Ariyavisitakul

IPC分类号： H04B1/10 ,  H04L27/00

CPC分类号： H04L1/0625 ,  H04B7/0417 ,  H04B7/0623 ,  H04B7/0669 ,  H04B7/068 ,  H04L1/0606 ,  H04L1/0681

摘要： Aspects of a method and system for a multiple-stream SFBC/STBC using angle feedback are presented. In one aspect of the method and system signals from M distinct spatial streams (NSS=M) are utilized to generate a plurality of 2M distinct transmit chain signals (NTX=2M) that are concurrently transmitted via a plurality of 2M transmitting antennas by a transmitting station. The set of concurrently transmitted transmit chain signals may be received at a receiving station via a plurality of NRX receiving antennas, where NRX≧M. The receiving station may compute a rotation angle value for each of a plurality of M−1 spatial streams among the plurality of M spatial streams. The receiving station may communicate the computed rotation angle values to the transmitting station. The transmitting station may utilize the received rotation angle values to generate subsequent concurrently transmitted signals.

摘要翻译： 提出了使用角度反馈的多流SFBC / STBC的方法和系统的方面。 在该方法的一个方面和来自M个不同空间流（NSS = M）的系统信号被用于产生多个2M个不同的发送链信号（NTX = 2M），其通过发送的多个2M发送天线同时发送 站。 可以在接收站处经由多个NRX接收天线接收并发发射链信号的集合，其中NRX≥M。 接收站可以计算多个M个空间流中的多个M-1个空间流中的每一个的旋转角度值。 接收站可以将计算的旋转角度值传送给发射站。 发射站可以利用接收到的旋转角度值来产生随后的并发发射信号。