公开(公告)号：JP2010193468A

公开(公告)日：2010-09-02

申请号：JP2010051164

申请日：2010-03-08

Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

Inventor： KETCHUM JOHN W ,  WALLACE MARK ,  WALTON J R ,  HOWARD STEVEN J

IPC: H04J99/00 ,  H04B7/005 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04J11/00 ,  H04L1/00 ,  H04L1/06 ,  H04L1/08 ,  H04L1/16 ,  H04L12/28 ,  H04L12/56 ,  H04L25/02 ,  H04L25/03 ,  H04L27/00 ,  H04L27/26 ,  H04W16/28 ,  H04W28/20 ,  H04W52/50

CPC classification number: H04B7/0421 ,  H04B7/043 ,  H04B7/0615 ,  H04B7/0669 ,  H04B7/0684 ,  H04B7/0697 ,  H04B7/0854 ,  H04L1/0001 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0017 ,  H04L1/0071 ,  H04L1/0618 ,  H04L1/08 ,  H04L1/16 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/006 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/03343 ,  H04L27/2613 ,  H04L2027/0089 ,  H04W16/28 ,  H04W28/20 ,  H04W52/50

Abstract: PROBLEM TO BE SOLVED: To provide pilots suitable for use in MIMO (multiple-input multiple-output) systems and capable of supporting various functions. SOLUTION: Various types of pilots include: a beacon pilot, a MIMO pilot, a steered reference or steered pilot, and a carrier pilot. The beacon pilot is transmitted from all transmit antennas and can be used for timing and frequency acquisition. The MIMO pilot is transmitted from all transmission antennas but is covered with different orthogonal codes assigned to the transmission antennas. The MIMO pilot can be used for channel estimation. The steered reference is transmitted on specific eigenmodes of a MIMO channel and specific to a user terminal. The steered reference can be used for channel estimation. The carrier pilot can be transmitted on designated sub-bands/antennas and can be used for phase tracking of a carrier signal. Various pilot transmission schemes can be devised based on different combinations of these various types of pilots. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：提供适合用于MIMO（多输入多输出）系统并能够支持各种功能的导频。 解决方案：各种类型的导频包括：信标导频，MIMO导频，转向引导或导向导频，以及载波导频。 信标导频从所有发射天线发射，可用于定时和频率采集。 MIMO导频从所有发送天线发送，但被分配给发送天线的不同的正交码覆盖。 MIMO导频可用于信道估计。 引导参考在MIMO信道的特定本征模式上发送并且特定于用户终端。 转向参考可用于信道估计。 载波导频可以在指定的子带/天线上传输，并可用于载波信号的相位跟踪。 可以基于这些各种类型的飞行员的不同组合来设计各种导频传输方案。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2013051693A

公开(公告)日：2013-03-14

申请号：JP2012214642

申请日：2012-09-27

Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

Inventor： SHRAVAN K SURINENI ,  J RODNEY WALTON ,  WALLACE MARK ,  HOWARD STEVEN J

IPC: H04J99/00 ,  H04B7/04 ,  H04B7/10 ,  H04W16/28 ,  H04W74/08

CPC classification number: H04B7/0636 ,  H04B7/0417 ,  H04B7/0634 ,  H04L1/1671

Abstract: PROBLEM TO BE SOLVED: To provide techniques for quickly sending feedback information for beamforming.SOLUTION: A transmitter sends a first frame comprising training symbols. A receiver receives the first frame, determines the amount of time to generate feedback information, and determines the amount of time to send the feedback information. The receiver then determines the length of a second frame based on the amount of time to generate and send the feedback information. The receiver sends the second frame after waiting a short interframe space (SIFS) period from the end of the first frame, without performing channel access. The receiver generates the feedback information based on the training symbols and sends the information in the second frame when ready. The transmitter receives the second frame, derives at least one steering matrix based on the feedback information, and sends a third frame with the at least one steering matrix.

Abstract translation: 要解决的问题：提供快速发送波束成形反馈信息的技术。 解决方案：发射机发送包括训练符号的第一帧。 接收器接收第一帧，确定产生反馈信息的时间量，并确定发送反馈信息的时间量。 然后，接收机基于生成和发送反馈信息的时间量确定第二帧的长度。 接收机在等待来自第一帧结束的短帧间间隔（SIFS）周期之后发送第二帧，而不执行信道接入。 接收机根据训练符号生成反馈信息，并在准备就绪时发送第二帧中的信息。 所述发射机接收所述第二帧，基于所述反馈信息导出至少一个导引矩阵，并且发送具有所述至少一个导引矩阵的第三帧。 版权所有（C）2013，JPO＆INPIT

公开(公告)号：JP2011160440A

公开(公告)日：2011-08-18

申请号：JP2011045443

申请日：2011-03-02

Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

Inventor： WALLACE MARK S ,  KETCHUM JOHN W ,  WALTON JAY RODNEY ,  HOWARD STEVEN J

IPC: H04J99/00 ,  H04B7/04 ,  H04B7/06 ,  H04B17/00 ,  H04L25/03

CPC classification number: H04B7/0421 ,  H04B17/20 ,  H04B17/21 ,  H04L25/03343 ,  H04L2025/03375 ,  H04L2025/03802

Abstract: PROBLEM TO BE SOLVED: To provide calibration of downlink and uplink to account for differences in the responses of transmit and receive chains at an access point and a user terminal. SOLUTION: For initial calibration, the access point and user terminal transmit MIMO pilots, which are used to derive channel estimates including the responses of the applicable transmit/receive chains, on the downlink and uplink. Correction matrices are derived based on these channel estimates, and thereafter they are used by the access point and user terminal, respectively. For follow-on calibration, one entity transmits the MIMO pilot and a steered reference. The other entity derives a first transmit matrix based on the steered reference, and a second transmit matrix based on the MIMO pilot and calibration error matrices which contain estimates of the errors. The calibration error matrices may be iteratively adjusted based on an adaptive procedure to minimize the errors between the two transmit matrices. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供下行链路和上行链路的校准以考虑接入点和用户终端处的发射和接收链的响应的差异。 解决方案：对于初始校准，接入点和用户终端发送MIMO导频，用于在下行链路和上行链路上导出包括适用的发射/接收链的响应的信道估计。 基于这些信道估计导出校正矩阵，然后分别由接入点和用户终端使用校正矩阵。 对于后续校准，一个实体发送MIMO导频和转向引用。 另一个实体基于导向参考导出第一发射矩阵，以及基于MIMO导频的第二发射矩阵和包含误差估计的校准误差矩阵。 可以基于自适应过程来迭代地调整校准误差矩阵，以最小化两个发射矩阵之间的误差。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2011101414A

公开(公告)日：2011-05-19

申请号：JP2011005178

申请日：2011-01-13

Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

Inventor： LUNDBY STEIN A ,  HOWARD STEVEN J ,  WALTON JAY RODNEY

IPC: H04J99/00 ,  H04B7/04 ,  H04B7/06 ,  H04J11/00 ,  H04L27/26

CPC classification number: H04L27/2602

Abstract: PROBLEM TO BE SOLVED: To much more increase the efficiency of data sending in a multi-antenna communication system utilizing orthogonal frequency division multiplexing (OFDM). SOLUTION: A sending entity uses a different steering vector for a different sub-band in order to accomplish a steering diversity. Each steering vector demarcates, in short, forms beams for a pertinent sub-band. An arbitrary steering vector may be used for the steering diversity. The steering vector may be demarcated so as to change consecutively in place of an abrupt change in the entire sub-band. This may be accomplished by applying a consecutively changing phase shift ranging over the entire sub-band for each sending antenna. As one example, the phase shift may change ranging over the entire sub-band for each sending antenna, and each antenna may be correlated with a different phase slope. When the phase shift changing linearly is applied to a modulation symbol in a frequency area, the application may be accomplished by either retarding a corresponding time area sample, or circularly shifting it. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：利用正交频分复用（OFDM）在多天线通信系统中进一步提高数据发送的效率。 解决方案：发送实体为不同的子带使用不同的导向向量，以便实现转向多样性。 简而言之，每个导向矢量对相关子带形成光束。 任意导向矢量可用于转向分集。 可以划分导向矢量以便连续地改变整个子带的突然变化。 这可以通过在每个发送天线的整个子带上应用连续变化的相移范围来实现。 作为一个示例，相移可以改变对于每个发送天线的整个子带的测距，并且每个天线可以与不同的相位斜率相关。 当相位线性地变化到频率区域中的调制符号时，可以通过延迟对应的时区采样或循环移位来实现应用。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2011061807A

公开(公告)日：2011-03-24

申请号：JP2010224039

申请日：2010-10-01

Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

Inventor： WALTON RODNEY J ,  KETCHUM JOHN W ,  WALLACE MARK S ,  HOWARD STEVEN J

IPC: H04J99/00 ,  H04B7/04 ,  H04B7/06 ,  H04J11/00 ,  H04L1/00 ,  H04L25/02 ,  H04L27/26

CPC classification number: H04L1/0002 ,  H04B7/0417 ,  H04B7/0617 ,  H04L25/0206 ,  H04L25/0212 ,  H04L25/0242 ,  H04L27/2647

Abstract: PROBLEM TO BE SOLVED: To provide frequency-independent eigensteering in MISO and MIMO systems.
SOLUTION: For principal mode and multi-mode eigensteering, a correlation matrix is computed for a MIMO channel on the basis of channel response matrices to obtain steering vectors. ND data symbol streams are transmitted on best spatial channels using steering vectors, where for N
D =1 for principal mode eigensteering and N
D >1 for multi-mode eigensteering. For main path eigensteering, a data symbol stream is transmitted on the best spatial channel for the main propagation path of the MIMO channel. For receiver eigensteering, a data symbol stream is steered toward a receive antenna on the basis of a steering vector obtained for that receive antenna. For all eigensteering schemes, a matched filter is derived for each receive antenna on the basis of the steering vector(s) and channel response vectors for the receive antenna.
COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：在MISO和MIMO系统中提供频率独立的本征导引。 解决方案：对于主模式和多模式特征向导，基于信道响应矩阵为MIMO信道计算相关矩阵以获得导向矢量。 ND数据符号流使用导向向量在最佳空间信道上发送，其中对于主模式本征转向为N D = 1，对于多模式特征向导为N D > 1。 对于主路径特征导向，在MIMO信道的主传播路径的最佳空间信道上发送数据符号流。 对于接收机本征导向，基于为该接收天线获得的导向向量，将数据符号流转向接收天线。 对于所有本征导向方案，基于接收天线的导向矢量和信道响应向量，为每个接收天线导出匹配滤波器。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2010252358A

公开(公告)日：2010-11-04

申请号：JP2010120682

申请日：2010-05-26

Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

Inventor： WALLACE MARK S ,  WALTON JAY RODNEY ,  HOWARD STEVEN J

IPC: H04J99/00 ,  H04B7/04 ,  H04B7/06 ,  H04L25/03 ,  H04L27/26

CPC classification number: H04B7/0615 ,  H04B7/0417

Abstract: PROBLEM TO BE SOLVED: To generate steering matrices for pseudo-random transmit steering (PRTS) to be used for spatial processing. SOLUTION: The steering matrices can be generated by selecting a base matrix which can be a Walsh matrix or a Fourier matrix. Different combinations of scalars are then selected, with each combination including at least one scalar for at least one row of the base matrix. Each scalar is a real or complex value (e.g., +1,-1,+j or -j). Different steering matrices are generated by multiplying the base matrix by each of the different combinations of scalars. The steering matrices are different permutations of the base matrix. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：生成用于空间处理的伪随机发射导向（PRTS）的导引矩阵。 解决方案：可以通过选择可以是沃尔什矩阵或傅立叶矩阵的基本矩阵来生成导引矩阵。 然后选择标量的不同组合，其中每个组合包括用于至少一行基本矩阵的至少一个标量。 每个标量是实数或复数值（例如，+ 1，-1，+ j或-j）。 通过将基本矩阵乘以标量的不同组合中的每一个来生成不同的导向矩阵。 导向矩阵是基本矩阵的不同排列。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2010213288A

公开(公告)日：2010-09-24

申请号：JP2010080856

申请日：2010-03-31

Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

Inventor： WALTON J RODNEY ,  KETCHUM JOHN W ,  SMEE JOHN EDWARD ,  WALLACE MARK S ,  HOWARD STEVEN J

IPC: H04J99/00 ,  H04B1/707 ,  H04B7/04 ,  H04B7/06 ,  H04B7/10 ,  H04J11/00 ,  H04L5/02 ,  H04Q7/36 ,  H04W16/28 ,  H04W72/12

CPC classification number: H04B7/043 ,  H04B1/71072 ,  H04B7/0408 ,  H04B7/0413 ,  H04B7/0421 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0697 ,  H04B17/309 ,  H04L5/023 ,  H04W16/28

Abstract: PROBLEM TO BE SOLVED: To provide a steering vector which is used by a terminal for transmission on the uplink by obtaining and decomposing an uplink channel response matrix for each terminal. SOLUTION: An "effective" uplink channel response vector is formed for each terminal based on its steering vector and its channel response matrix. Multiple sets of terminals are evaluated based on their effective channel response vectors to determine the best set for uplink transmission. Each selected terminal performs spatial processing on its data symbol stream with its steering vector and transmits its spatially processed data symbol stream to an access point. The multiple selected terminals simultaneously transmit their data symbol streams via their respective MIMO channels to the access point. The access point performs receiver spatial processing to its received symbol streams. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：提供一种由终端用于在上行链路上进行发送的导向向量，通过获得和分解每个终端的上行链路信道响应矩阵。 解决方案：基于其导向向量及其信道响应矩阵，为每个终端形成“有效”上行链路信道响应向量。 基于其有效信道响应向量来评估多组终端，以确定用于上行链路传输的最佳集合。 每个选择的终端利用其导向向量对其数据符号流执行空间处理，并将其空间处理的数据符号流发送到接入点。 多个选择的终端通过其相应的MIMO信道同时将其数据符号流发送到接入点。 接入点对其接收到的符号流执行接收机空间处理。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2013042506A

公开(公告)日：2013-02-28

申请号：JP2012187907

申请日：2012-08-28

Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

Inventor： HOWARD STEVEN J ,  WALTON JAY RODNEY ,  WALLACE MARK S

IPC: H04J99/00 ,  H04B7/04 ,  H04B7/06 ,  H04B7/10 ,  H04J11/00 ,  H04L5/02 ,  H04L27/26 ,  H04W16/28 ,  H04W72/04

CPC classification number: H04B7/0617 ,  H04B7/0408 ,  H04B7/0417 ,  H04B7/0626 ,  H04B7/0671

Abstract: PROBLEM TO BE SOLVED: To provide continuous beamforming for a MIMO-OFDM system.SOLUTION: A transmitting entity 210 performs spatial processing on data symbols for each subband with an eigenmode matrix, a steering matrix, or an identity matrix to obtain spatially processed symbols for the subband. The data symbols are sent on orthogonal spatial channels with the eigenmode matrix, on different spatial channels with the steering matrix, or from different transmit antennas with the identity matrix. The transmitting entity further performs beamforming on the spatially processed symbols, in the frequency domain or time domain, prior to transmission from the multiple transmit antennas 234. A receiving entity 250 performs complementary processing to recover the data symbols sent by the transmitting entity. The receiving entity derives a spatial filter matrix for each subband on the basis of a MIMO channel response for that subband and performs receiver spatial processing for the subband with the spatial filter matrix.

Abstract translation: 要解决的问题：为MIMO-OFDM系统提供连续波束成形。 解决方案：发送实体210对具有本征模式矩阵，导向矩阵或单位矩阵的每个子带的数据符号执行空间处理，以获得子带的空间处理符号。 数据符号在具有本征模式矩阵的正交空间信道上，在具有导引矩阵的不同空间信道上，或者从具有单位矩阵的不同发射天线发送。 发射实体在从多个发射天线234发射之前，在频域或时域中进一步对空间处理符号进行波束成形。接收实体250执行补充处理以恢复由发射实体发送的数据符号。 接收实体根据该子带的MIMO信道响应为每个子带导出空间滤波器矩阵，并利用空间滤波器矩阵对子带执行接收机空间处理。 版权所有（C）2013，JPO＆INPIT

公开(公告)号：JP2011147143A

公开(公告)日：2011-07-28

申请号：JP2011025958

申请日：2011-02-09

Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

Inventor： HOWARD STEVEN J ,  KETCHUM JOHN W ,  WALLACE MARK S ,  MONSEN PETER ,  WALTON JAY RODNEY

IPC: H04J99/00 ,  H04B7/04

CPC classification number: H04B7/0854 ,  H04B7/0413 ,  H04L25/0246 ,  H04L25/0248 ,  H04L2025/03426 ,  H04L2025/03605 ,  H04L2025/03611

Abstract: PROBLEM TO BE SOLVED: To efficiently derive a spatial filter matrix. SOLUTION: In a first scheme, a Hermitian matrix is iteratively derived based on a channel response matrix, and a matrix inversion is indirectly calculated by deriving the Hermitian matrix iteratively. The spatial filter matrix is derived based on the Hermitian matrix and the channel response matrix. In a second scheme, multiple rotations are performed to iteratively obtain first and second matrices for a pseudo-inverse matrix of the channel response matrix. The spatial filter matrix is derived based on the first and second matrices. In a third scheme, a matrix is formed based on the channel response matrix and decomposed to obtain a unitary matrix and a diagonal matrix. The spatial filter matrix is derived based on the unitary matrix, the diagonal matrix, and the channel response matrix. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：有效地导出空间滤波器矩阵。 解决方案：在第一种方案中，基于信道响应矩阵迭代地导出Hermitian矩阵，并且通过迭代地导出Hermitian矩阵来间接计算矩阵求逆。 基于Hermitian矩阵和信道响应矩阵导出空间滤波矩阵。 在第二方案中，执行多次旋转以迭代地获得用于信道响应矩阵的伪逆矩阵的第一和第二矩阵。 基于第一和第二矩阵导出空间滤波器矩阵。 在第三方案中，基于信道响应矩阵形成矩阵并分解以获得酉矩阵和对角矩阵。 基于单一矩阵，对角矩阵和信道响应矩阵导出空间滤波器矩阵。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2010239653A

公开(公告)日：2010-10-21

申请号：JP2010132185

申请日：2010-06-09

Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

Inventor： WALTON JAY R ,  KETCHUM JOHN W ,  HOWARD STEVEN J ,  WALLACE MARK

IPC: H04J11/00 ,  H04L1/00 ,  H04Q7/38

CPC classification number: H04L1/0015 ,  H04L1/0002 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0025 ,  H04L1/0026 ,  Y02D50/10

Abstract: PROBLEM TO BE SOLVED: To provide a technology for adaptively controlling a data transmission rate in a radio (e.g., OFDM) communication system.
SOLUTION: In one viewpoint, various kinds of metrics may be derived and used to select a suitable rate for data transmission. Some kinds of metrics relate to different characteristics of a communication channel such as an SNR, a frequency selection degree, a time selection degree and the like. One kind of metrics relates to data transmission performance. In another viewpoint, the various kinds of metrics may be used in a different way to adaptively control the rate. Some metrics may be used for open-loop control, other metrics may be used for closed-loop control, and some may be used for both. For example, a channel metrics may be used to decide or select the rate, and a performance metrics may be used to decide whether or not to adjust the rate.
COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供一种用于在无线电（例如，OFDM）通信系统中自适应地控制数据传输速率的技术。 解决方案：从一个角度来看，可以导出各种度量来用于选择用于数据传输的合适的速率。 某些度量涉及通信信道的不同特性，例如SNR，频率选择度，时间选择度等。 一种度量与数据传输性能有关。 另一方面，可以以不同的方式使用各种度量来自适应地控制速率。 一些度量可以用于开环控制，其他度量可以用于闭环控制，一些度量可以用于两者。 例如，可以使用信道度量来决定或选择速率，并且可以使用性能度量来决定是否调整速率。 版权所有（C）2011，JPO＆INPIT