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    Mimo closed-loop rate control for a communication system
    32.
    发明专利
    Mimo closed-loop rate control for a communication system 有权
    用于MIMO通信系统的闭环速率控制

    公开(公告)号：JP2010268456A

    公开(公告)日：2010-11-25

    申请号：JP2010108586

    申请日：2010-05-10

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

    Inventor： WALTON JAY RODNEY ,  WALLACE MARK S

    IPC: H04J99/00 ,  H04B7/04

    CPC classification number: H04B7/0619 ,  H04B7/0417 ,  H04L1/0002 ,  H04L1/0003 ,  H04L1/0006 ,  H04L1/0009 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/06 ,  H04L1/208 ,  H04L27/2601 ,  Y02D50/10

    Abstract: PROBLEM TO BE SOLVED: To provide a method of executing closed-loop control for an MIMO system. SOLUTION: Rate control of an MIMO system is achieved using an inner loop that selects rates and an outer loop that regulates the operation of the inner loop. For the inner loop, SNR estimates are obtained on a data stream basis based on received pilot symbols and/or received data symbols. An effective SNR is derived for each data stream based on the SNR estimates, a diversity order, an MIMO backoff factor, and an outer loop backoff factor for the data stream. The rates are then selected for the data streams based on the effective SNRs for the data streams. The outer loop adjusts the outer loop backoff factor for each data stream based on the performance (e.g., packet errors and/or decoder metrics) for the data stream. COPYRIGHT: (C)2011,JPO&INPIT

    Abstract translation: 要解决的问题：提供对MIMO系统执行闭环控制的方法。 解决方案：使用选择速率的内部环路和调节内部环路的操作的外部环路来实现MIMO系统的速率控制。 对于内循环，基于接收的导频符号和/或接收的数据符号，在数据流基础上获得SNR估计。 基于用于数据流的SNR估计，分集阶数，MIMO退避因子和外环回退因子，为每个数据流导出有效SNR。 然后基于数据流的有效SNR选择数据流的速率。 外部环路基于数据流的性能（例如，分组错误和/或解码器度量）来调整每个数据流的外环回退系数。 版权所有（C）2011，JPO＆INPIT

    Open loop rate control for tdd communication system
    33.
    发明专利
    Open loop rate control for tdd communication system 审中-公开
    用于TDD通信系统的开环速率控制

    公开(公告)号：JP2010213291A

    公开(公告)日：2010-09-24

    申请号：JP2010086978

    申请日：2010-04-05

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

    Inventor： WALTON JAY RODNEY ,  SURINENI SHRAVAN K ,  MEYLAN ARNAUD ,  NANDA SANJIV

    IPC: H04W28/18 ,  H04J99/00 ,  H04W28/06 ,  H04W28/22

    CPC classification number: H04L1/0015 ,  H04B17/309 ,  H04L1/0002 ,  H04L1/1607 ,  Y02D50/10

    Abstract: PROBLEM TO BE SOLVED: To provide techniques for performing open-loop rate control in a TDD communication system. SOLUTION: In the open-loop rate control, the channel quality of a first link (B, A) is estimated based on a transmission received via the first link (B, A). The channel quality of a second link (A, B) is estimated based on the estimated channel quality of the first link (B, A) and an asymmetric parameter. A rate for a data transmission via the second link (A, B) is selected based on the estimated channel quality of the second link (A, B). The estimated channel quality for each link may be given by a set of SNR estimates for a set of transmission channels on that link. The asymmetric parameter may be determined based on (1) the capabilities (e.g., transmission power, receiver noise figure, and number of antennas) of the transmitting and receiving stations or (2) received SNRs for the first link (B, A) and second link (A, B). COPYRIGHT: (C)2010,JPO&INPIT

    Abstract translation: 要解决的问题：提供在TDD通信系统中执行开环速率控制的技术。 解决方案：在开环速率控制中，基于经由第一链路（B，A）接收的传输来估计第一链路（B，A）的信道质量。 基于第一链路（B，A）的估计信道质量和非对称参数来估计第二链路（A，B）的信道质量。 基于第二链路（A，B）的估计信道质量来选择经由第二链路（A，B）进行数据传输的速率。 每个链路的估计信道质量可以由对该链路上的一组传输信道的一组SNR估计给出。 可以基于（1）发射和接收站的能力（例如，发射功率，接收机噪声系数和天线数量）来确定非对称参数，或者（2）第一链路（B，A）和 第二连接（A，B）。 版权所有（C）2010，JPO＆INPIT

    Continuous beamforming for mimo-ofdm system
    34.
    发明专利
    Continuous beamforming for mimo-ofdm system 审中-公开
    用于MIMO-OFDM系统的连续波束

    公开(公告)号：JP2010178352A

    公开(公告)日：2010-08-12

    申请号：JP2010040561

    申请日：2010-02-25

    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 ,  H04L5/02 ,  H04L27/26

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

    Abstract: PROBLEM TO BE SOLVED: To perform continuous beamforming for a MIMO-OFDM system. SOLUTION: A transmitting entity performs spatial processing on data symbols for each subband with an eigenmode matrix, a steering matrix, or an identity matrix. The data symbols may be sent on orthogonal spatial channels by using the eigenmode matrix, on different spatial channels by using the steering matrix, or from different transmit antennas by using 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. A receiving entity performs the complementary processing to recover the data symbols sent by the transmitting entity. Moreover, the receiving entity may derive a spatial filter matrix for each subband based on a MIMO channel response for that subband and perform receiver spatial processing for the subband by using the spatial filter matrix. COPYRIGHT: (C)2010,JPO&INPIT

    Abstract translation: 要解决的问题：为MIMO-OFDM系统执行连续波束成形。 解决方案：发送实体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。 数据符号可以在正交空间信道上通过使用本征模式矩阵，在不同的空间信道上使用导引矩阵，或者通过使用单位矩阵从不同的发射天线发送。 在从多个发射天线的发射之前，发射实体在频域或时域中进一步对空间处理的符号执行波束成形。 接收实体执行补充处理以恢复由发送实体发送的数据符号。 此外，接收实体可以基于该子带的MIMO信道响应导出每个子带的空间滤波器矩阵，并且通过使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）2010，JPO＆INPIT

    Open-loop rate control for tdd communication system
    35.
    发明专利
    Open-loop rate control for tdd communication system 有权
    TDD通信系统的开环速率控制

    公开(公告)号：JP2013168967A

    公开(公告)日：2013-08-29

    申请号：JP2013058281

    申请日：2013-03-21

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

    Inventor： WALTON JAY RODNEY ,  SURINENI SHRAVAN K ,  MEYLAN ARNAUD ,  NANDA SANJIV

    IPC: H04W28/06 ,  H04J99/00 ,  H04W28/18 ,  H04W72/04

    CPC classification number: H04L1/0015 ,  H04B17/309 ,  H04L1/0002 ,  H04L1/1607 ,  Y02D50/10

    Abstract: PROBLEM TO BE SOLVED: To provide techniques for performing open-loop rate control in a TDD communication system.SOLUTION: The channel quality of a first link is estimated based on a transmission received via the first link (114). The channel quality of a second link is estimated based on the estimated channel quality of the first link and an asymmetric parameter (116). At least one rate for a data transmission via the second link is selected based on the estimated channel quality of the second link (118). The estimated channel quality for each link may be given by a set of SNR estimates for a set of transmission channels on that link (120). The asymmetric parameter may be determined based on (1) the capabilities (e.g., transmit power, receiver noise figure, and number of antennas) of the transmitting and receiving stations or (2) received SNRs for the first and the second links.

    Abstract translation: 要解决的问题：提供在TDD通信系统中执行开环速率控制的技术。解决方案：基于经由第一链路（114）接收的传输来估计第一链路的信道质量。 基于第一链路的估计信道质量和非对称参数来估计第二链路的信道质量（116）。 基于第二链路（118）的估计信道质量来选择用于经由第二链路的数据传输的至少一个速率。 每个链路的估计信道质量可以由针对该链路（120）上的一组传输信道的一组SNR估计来给出。 可以基于（1）发射和接收站的能力（例如，发射功率，接收机噪声系数和天线数）来确定非对称参数，或者（2）第一和第二链路的接收SNR。

    Remote front-end for multi-antenna station
    36.
    发明专利
    Remote front-end for multi-antenna station 审中-公开
    多天线远端前端

    公开(公告)号：JP2013048429A

    公开(公告)日：2013-03-07

    申请号：JP2012204566

    申请日：2012-09-18

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

    Inventor： ZHANG XIANGDONG ,  WALTON JAY RODNEY

    IPC: H04B1/40 ,  H04J99/00

    CPC classification number: H04B1/18 ,  H04B1/48 ,  H04B7/04

    Abstract: PROBLEM TO BE SOLVED: To provide a technology for coupling antennas to a transceiver.SOLUTION: A multi-antenna station has multiple remote front-ends 140n coupled to multiple antennas 150n. Each remote front-end includes a power amplifier (PA), a low noise amplifier (LNA), and first and second coupling units. On a transmit path, a first RF signal is received via a first port, routed by the first coupling unit to the power amplifier, amplified to obtain a desired output power level, and routed by the second coupling unit to a second port for transmission via the antennas. On a receive path, a second RF signal is received via the second port, routed by the second coupling unit to the LNA, amplified to obtain a higher signal level, and routed by the first coupling unit to the first port for transmission to a transceiver 130.

    Abstract translation: 要解决的问题：提供将天线耦合到收发器的技术。 解决方案：多天线站具有耦合到多个天线150n的多个远端前端140n。 每个远程前端包括功率放大器（PA），低噪声放大器（LNA）以及第一和第二耦合单元。 在发送路径上，经由第一端口接收第一RF信号，由第一耦合单元路由到功率放大器，被放大以获得期望的输出功率电平，并由第二耦合单元路由到第二端口以便经由 天线。 在接收路径上，通过第二端口接收第二RF信号，由第二耦合单元路由到LNA，被放大以获得更高的信号电平，并由第一耦合单元路由到第一端口以传输到收发机 130.版权所有（C）2013，JPO＆INPIT

    Range extension techniques for wireless local area network
    39.
    发明专利
    Range extension techniques for wireless local area network 有权
    无线局域网的范围扩展技术

    公开(公告)号：JP2012114922A

    公开(公告)日：2012-06-14

    申请号：JP2011262030

    申请日：2011-11-30

    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

    IPC: H04B1/7087 ,  H04B1/707 ,  H04W56/00 ,  H04W72/12 ,  H04W74/02 ,  H04W84/12 ,  H04W88/02 ,  H04W88/04

    CPC classification number: H04L27/0014 ,  H04L27/2613 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2675 ,  H04L27/2676 ,  H04W74/02 ,  H04W84/12 ,  H04W88/04

    Abstract: PROBLEM TO BE SOLVED: To provide techniques for extending transmission range in a WLAN.SOLUTION: A receiving station determines the frequency error between a transmitting station and the receiving station based on one or more initial packet transmissions and corrects this frequency error for subsequent packet transmissions received from the transmitting station. The residual frequency error is small after correcting the frequency error and allows the receiving station to perform coherent accumulation/integration over a longer time interval to detect a packet transmission. The longer coherent accumulation interval improves detection performance, especially at low SNRs for extended transmission range. The techniques may be used whenever the receiving station knows the identity of the transmitting station. A preamble is generated with a longer spreading sequence and sent with each packet transmission.

    Abstract translation: 要解决的问题：提供用于扩展WLAN中的传输范围的技术。 解决方案：接收站基于一个或多个初始分组传输来确定发射站和接收站之间的频率误差，并且校正该频率误差以用于从发射站接收的后续分组传输。 修正频率误差后残差频率误差较小，允许接收台在更长的时间间隔内进行相干累加/积分，以检测分组传输。 较长的相干累加间隔提高了检测性能，特别是在扩展传输范围的低SNR时。 只要接收站知道发射台的身份，就可以使用这些技术。 产生具有较长扩展序列的前同步码，并与每个分组传输一起发送。 版权所有（C）2012，JPO＆INPIT

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